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BGP 会话的负载平衡
了解 BGP 多路径
BGP 多路径允许您将多个内部 BGP 路径和多个外部 BGP 路径安装到转发表。选择多条路径后，BGP 可以跨多个链路平衡通信负载。
如果 BGP 路径选择进程在将 IGP 成本与下一跳跃进行比较之后执行了并列断路，则会将该路径视为 BGP 等-成本路径（并用于转发）。默认情况下，在多路径选择过程中，将考虑与支持多路径的 BGP 邻居学习的所有相邻路径。
BGP 通常只为每个前缀选择一个最佳路径，并在转发表中安装该路由。启用 BGP 多路径时，设备会选择多个同等成本的 BGP 路径来到达给定目标，并且所有这些路径都将安装在转发表中。BGP 仅将活动路径通告至其邻接方，除非正在使用添加路径。
Junos OS BGP 多路径功能支持以下应用程序：
跨属于不同自治系统的两个路由设备之间的多个链路的负载平衡（As）
通过一个公共子网或多个子网将负载平衡到属于同一对等方的不同路由设备
跨属于不同外部联合体对等方的两个路由设备之间的多个链路的负载平衡
将公共子网或多个子网负载平衡到属于外部联合体对等方的不同路由设备
在常见负载平衡情况下，客户在存在点（POP）中是多个路由器或交换机的多主机。默认行为是仅通过一个可用链路发送所有流量。负载平衡会导致流量使用两个或更多链路。
BGP 多路径不适用于具有相同的 MED-V IGP 成本的路径，但 IGP 成本不同。多路径路径选择基于 IGP 成本指标，即使两个路径具有相同的 MED-V + IGP 成本也是如此。
从 Junos OS 版本 18.1 R1 开始 BGP 在[edit protocols bgp]层次结构级别全局支持多路径。您可以有选择地禁用某些 BGP 组和邻居上的多路径。包含disable在[edit protocols bgp group group-name multipath]层次结构级别，用于禁用组或特定 BGP 邻居的多路径选项。
从 Junos OS 版本 18.1 R1 开始，您可以推迟多路径计算，直到收到所有 BGP 路由。启用多路径时，每次添加新路由或现有路由发生变化时，BGP 都会将路由插入多路径队列中。通过 BGP 添加路径功能接收多条路径时，BGP 可能多次计算一个多路径路由。多路径计算减慢了筋（也称为路由表）学习率。为了加速筋学习，多路径计算可以推迟到 BGP 路由接收，或者可以根据您的要求降低多路径生成作业的优先级，直至解决 BGP 路由。在defer-initial-multipath-build层次结构级别推迟多[edit protocols bgp]路径计算配置。或者，您可以使用multipath-build-priority[edit protocols bgp]层次结构级别的配置语句降低 BGP 多路径生成作业优先级，以加速筋学习。
另请参阅
示例：负载平衡 BGP 流量
此示例演示如何将 BGP 配置为选择多个同等成本外部 BGP （EBGP）或内部 BGP （IBGP）路径作为活动路径。
要求
开始之前：
配置设备接口。
配置内部网关协议（IGP）。
配置 BGP。
将路由策略（例如直接路由或 IGP 路由）从路由表中配置为将路由导出到 BGP 中。
概述
以下步骤说明如何配置按数据包负载平衡：
定义负载平衡路由策略，方法是在
policy-statement[edit policy-options]层次结构级别包括一个或多个语句，定义load-balance per-packet以下操作：policy-statement policy-name { from { match-conditions; route-filter destination-prefix match-type <actions>; prefix-list name; } then { load-balance per-packet; } }将策略应用于从路由表导出到转发表的路由。为此，请包括
forwarding-table和export语句：forwarding-table { export policy-name; }
您不能将导出策略应用于 VRF 路由实例。
在分配与要通告的路由对应的标签时，指定该路由的所有下一跃点（如果存在）。
将 MPLS 的转发选项哈希密钥配置为包含 IP 有效负载。
注：
在某些平台上，您可以使用chassis maximum-ecmp语句来增加进行负载平衡的路径数量。借助此语句，您可以将等价负载平衡路径的最大数量更改为 32、64、128、256 或 512（每个平台的最大数量各不相同 —请参阅 最大 ecmp。） 从Junos OS版本19.1R1，您可以在交换机上指定最多 128 个等QFX10000路径。从 Junos OS 版 19.2R1 开始，您可以在 QFX10000 交换机上指定最多 512 个等价路径。— 请参阅 了解最多 512条成本相等路径的配置 （带可选的一致负载平衡）。
在此例中，设备 R1 在 AS 64500 中，并且连接到设备 R2 和设备 R3，两者均在 AS 64501 中。此示例显示设备 R1 上的配置。
配置
操作
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，然后将命令复制并粘贴到[edit]层次结构级别的 CLI 中。
set protocols bgp group external type external set protocols bgp group external peer-as 64501 set protocols bgp group external multipath set protocols bgp group external neighbor 10.0.1.1 set protocols bgp group external neighbor 10.0.0.2 set policy-options policy-statement loadbal from route-filter 10.0.0.0/16 orlonger set policy-options policy-statement loadbal then load-balance per-packet set routing-options forwarding-table export loadbal set routing-options autonomous-system 64500
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置 BGP 对等体会话：
配置 BGP 组。
[edit protocols bgp group external] user@R1# set type external user@R1# set peer-as 64501 user@R1# set neighbor 10.0.1.1 user@R1# set neighbor 10.0.0.2
使 BGP 组可以使用多个路径。
注：要禁用要求 BGP 多路径接受的路径必须具有相同邻接自治系统（AS）的默认检查，请包含
multiple-as选项。[edit protocols bgp group external] user@R1# set multipath
配置负载平衡策略。
[edit policy-options policy-statement loadbal] user@R1# set from route-filter 10.0.0.0/16 orlonger user@R1# set then load-balance per-packet
应用负载平衡策略。
[edit routing-options] user@R1# set forwarding-table export loadbal
配置本地自治系统（AS）编号。
[edit routing-options] user@R1# set autonomous-system 64500
成果
从配置模式，输入show protocols、 show policy-options和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
[edit]
user@R1# show protocols
bgp {
group external {
type external;
peer-as 64501;
multipath;
neighbor 10.0.1.1;
neighbor 10.0.0.2;
}
}
[edit]
user@R1# show policy-options
policy-statement loadbal {
from {
route-filter 10.0.0.0/16 orlonger;
}
then {
load-balance per-packet;
}
}
[edit]
user@R1# show routing-options
autonomous-system 64500;
forwarding-table {
export loadbal;
}
如果您完成了设备配置，请从commit配置模式进入。
针对
确认配置是否正常工作：
验证路由
用途
验证从邻接 AS 中的两个路由器获知了路由。
行动
从操作模式运行show route命令。
user@R1> show route 10.0.2.0
inet.0: 12 destinations, 15 routes (12 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.0.2.0/30 *[BGP/170] 03:12:32, localpref 100
AS path: 64501 I
to 10.0.1.1 via ge-1/2/0.0
> to 10.0.0.2 via ge-1/2/1.0
[BGP/170] 03:12:32, localpref 100
AS path: 64501 I
> to 10.0.1.1 via ge-1/2/0.0user@R1> show route 10.0.2.0 detail
inet.0: 12 destinations, 15 routes (12 active, 0 holddown, 0 hidden)
10.0.2.0/30 (2 entries, 1 announced)
*BGP Preference: 170/-101
Next hop type: Router, Next hop index: 262142
Next-hop reference count: 3
Source: 10.0.0.2
Next hop: 10.0.1.1 via ge-1/2/0.0
Next hop: 10.0.0.2 via ge-1/2/1.0, selected
State: <Active Ext>
Local AS: 64500 Peer AS: 64501
Age: 3:18:30
Task: BGP_64501.10.0.0.2+55402
Announcement bits (1): 2-KRT
AS path: 64501 I
Accepted Multipath
Localpref: 100
Router ID: 192.168.2.1
BGP Preference: 170/-101
Next hop type: Router, Next hop index: 602
Next-hop reference count: 5
Source: 10.0.1.1
Next hop: 10.0.1.1 via ge-1/2/0.0, selected
State: <NotBest Ext>
Inactive reason: Not Best in its group - Active preferred
Local AS: 64500 Peer AS: 64501
Age: 3:18:30
Task: BGP_64501.10.0.1.1+53135
AS path: 64501 I
Accepted
Localpref: 100
Router ID: 192.168.3.1含义
活动路径（用星号（*）表示）有两个下一个跃点：10.0.1.1 和10.0.0.2 到10.0.2.0 目标。10.0.1.1 下一跃点将从非活动路径复制至活动状态。
注：
命令show route detail输出将指定一个网关selected。此输出在负载平衡环境中可能会造成混淆。除了在 Junos OS 执行每数据包负载平衡时决定将哪个网关安装到内核中之外，所选网关还可用于许多用途。例如，此ping mpls命令在发送数据包时使用选定的网关。在某些情况下，多播协议使用所选网关来确定上游接口。因此，即使 Junos OS 通过转发表策略执行按数据包的负载平衡，所选的网关信息仍然是其他用途所必需的。显示选定网关以进行故障排除是很有用的。此外，还可以使用转发表策略重写内核中安装的内容（例如，使用install-nexthop操作）。在这种情况下，在转发表中安装的后一中继站网关可能是show route命令中显示的全部网关的子集。
验证转发
用途
验证转发表中是否安装了下一个跃点。
行动
从操作模式运行show route forwarding-table命令。
user@R1> show route forwarding-table destination 10.0.2.0
Routing table: default.inet
Internet:
Destination Type RtRef Next hop Type Index NhRef Netif
10.0.2.0/30 user 0 ulst 262142 2
10.0.1.1 ucst 602 5 ge-1/2/0.0
10.0.0.2 ucst 522 6 ge-1/2/1.0通过可选一致负载平衡了解高达512的同等成本路径的配置
您可以为外部 BGP 对等方配置具有高达512路径的同等成本多路径（ECMP）功能。能够配置多达 512 ECMP 下一跃点，使您可以增加与指定路由设备的直接 BGP 对等体连接数，从而提高延迟和优化数据流。您可以选择在该 ECMP 配置中包含一致的负载平衡。一致的负载平衡可确保如果 ECMP 成员（即路径）发生故障，则只会将流过故障成员的信息流重新分配给其他活动 ECMP 成员。一致负载平衡还可以确保如果添加了 ECMP 成员，则从现有 EMCP 成员到新 ECMP 成员的再分配将降至最低。
从256到512等高成本路径进行配置的准则和限制，可选择采用一致的负载平衡
此功能仅适用于单跳外部 BGP 对等方。（此功能不适用于 MPLS 路由。）
设备的路由进程 （RPD） 必须支持 64 位模式;不支持 32 位 RPD。
此功能仅适用于单播流量。
信息流分布可能甚至不是跨所有组成员 - 这取决于信息流模式和硬件中散列流集表的组织。在组中添加或删除成员时，一致的散列将流重新映射降至目标链路。
如果您使用
set forwarding-options enhanced-hash-key其中一个选项hash-mode进行配置，inetinet6或layer2，某些流可能会更改目标链路，因为新的哈希参数可能会为流生成新的哈希索引，从而产生新的目标链路。为了实现最佳的哈希精确性，此功能使用级联拓扑来实施下一跳结构，用于配置超过128的下一跃点。因此，散列准确性比 ECMP 不需要级联拓扑的下一中继站128配置稍小。
受影响的 ECMP 路径上的现有流和流入这些受影响的 ECMP 路径的新流可能会在本地路由修复期间切换路径，并且流量扭曲可能很明显。但是，在后续全局路由维修期间，任何此类扭曲都将得到纠正。
如果增加
maximum-ecmp该值，在路由前缀的下一次跳转事件期间将丢失一致性散列。如果向现有 ECMP 组添加新路径，则某些不受影响的路径上的流可能会移至新添加的路径。
快速重新路由（FRR）可能无法与一致的散列一起使用。
无法实现完美 ECMP 的流量分布。与其他路径相比，"包"路径的流量更多，而存储段更少（包是负载平衡表分布列表中映射到 ECMP 成员索引的条目）。
在网络拓扑变更事件期间，在某些情况下，网络前缀会丢失一致散列，因为这些前缀指向新的 ECMP 下一跃点，而该跃点没有前缀上一个 ECMP 下一跃点的所有属性。
如果多个网络前缀指向同一 ECMP 下一跳跃，并且语句启用了一个或多个这些前缀，则指向同一 ECMP 下一跳跃的所有网络前缀都显示一致
consistent-hash散列行为。仅在基于路由的相同BGP上支持一致散列。如果配置的其他协议或静态路由的优先级高于 BGP 路由，则不支持一致哈希。
如果配置与以下功能的配置结合使用，则一致散列可能有一些限制，因为这些功能具有隧道终止或信息流工程，不使用散列来选择路径—GRE 隧道;BUM 流量;EVPN-VXLAN;自动MPLS 流量工程，自动带维
有关配置最高 512 ECMP 下一跃点的说明，以及配置一致的负载平衡（可选）
准备好配置最多512下一跃点时，请使用以下配置说明：
配置 ECMP 下一跃点的最大数量 —例如，配置 512 个 ECMP 下一跃点：
[edit] user@host# set chassis maximum-ecmp 512
创建路由策略并启用按数据包负载平衡，从而在系统上全局启用 ECMP：
[edit] user@host# set routing-options forwarding-table export load-balancing-policy user@host# set policy-options policy-statement load-balancing-policy then load-balance per-packet
创建单独的路由策略，将传入路由与一个或多个目标前缀匹配，以在选定前缀上启用弹性，例如：
[edit] user@host# set policy-options policy-statement c-hash from route-filter 20.0.0.0/24 orlonger user@host# set policy-options policy-statement c-hash then load-balance consistent-hash
将 eBGP 导入策略（例如，"c-hash"）应用于外部BGP组：
[edit] user@host# set protocols bgp import c-hash
有关配置同等成本路径的详细信息，请参阅示例：负载平衡 BGP 信息流，这将在本文档前面显示。
（可选）有关配置一致负载平衡（也称为一致性散列）的详细信息，请参阅 为ECMP组配置一致负载平衡
另请参阅
示例：配置单跳 EBGP 对等方以接受远程下一跃点
此示例演示如何将单跳外部 BGP （EBGP）对等方配置为接受不共享公共子网的远程下一跳跃。
要求
在配置此示例之前，不需要进行设备初始化以外的特殊配置。
概述
在某些情况下，必须配置一个单跳 EBGP 对等方，以接受远程下一个不共享公共子网的后续跳跃。默认行为是指从单跳 EBGP 对接到的任何下一中继站地址，不被识别为共享要丢弃的公共子网。让单跳 EBGP 对等方接受未直接连接的远程下一跳跃的能力还可防止您将单跳 EBGP 邻域配置为多跳会话。在此情况下配置多跳会话时，通过此 EBGP 对等方获知的所有下一跃点路由都标记为间接，即使它们共享公共子网也是如此。这种情况会中断通过包含这些下一跳跃地址的路由以递归方式解析路由的多路径功能。配置accept-remote-nexthop语句时，允许单跳 EBGP 对等方接受远程下一跳跃，这将恢复通过这些下一跳地址解析的路由的多路径功能。您可在 BGP 的全局、组和邻居层次结构级别上配置此语句。逻辑系统和 VPN 路由和转发（VRF）路由实例类型也支持此语句。远程下一跳跃和 EBGP 对等方都必须支持BGP刷新路由，如 RFC 2918" BGP-4 中的路由更新功能 "中定义。如果远程对等方不支持 BGP 路由刷新，则会重置会话。
当您启用一个单跳 EBGP 对等方接受远程下一跳跃时，您还必须在 EBGP 对等方上配置一个用于指定远程下一中继站地址的导入路由策略。
此示例包含一个导入路由策略agg_route，允许单跳外部 BGP 对等体（设备 R1）接受远程下一中继站1.1.10.10，以便路由到 1.1.230.0/23 网络。在[edit protocols bgp]层次结构级别，该示例包含将import agg_route策略应用于外部 BGP 对等体的语句，并包含使单accept-remote-nexthop跳 EBGP 对等方能够接受远程下一跳跃的语句。
图 2显示了示例拓扑。
图 2： 用于接受远程下一跳跃的拓扑
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，然后将命令复制并粘贴到[edit]层次结构级别的 CLI 中。
设备 R0
set interfaces fe-1/2/0 unit 1 family inet address 1.1.0.1/30 set interfaces fe-1/2/1 unit 2 family inet address 1.1.1.1/30 set interfaces lo0 unit 1 family inet address 10.255.14.179/32 set protocols bgp group ext type external set protocols bgp group ext export test_route set protocols bgp group ext export agg_route set protocols bgp group ext peer-as 65000 set protocols bgp group ext multipath set protocols bgp group ext neighbor 1.1.0.2 set protocols bgp group ext neighbor 1.1.1.2 set policy-options policy-statement agg_route term 1 from protocol static set policy-options policy-statement agg_route term 1 from route-filter 1.1.230.0/23 exact set policy-options policy-statement agg_route term 1 then accept set policy-options policy-statement test_route term 1 from protocol static set policy-options policy-statement test_route term 1 from route-filter 1.1.10.10/32 exact set policy-options policy-statement test_route term 1 then accept set routing-options static route 1.1.10.10/32 reject set routing-options static route 1.1.230.0/23 reject set routing-options autonomous-system 65500
设备 R1
set interfaces fe-1/2/0 unit 3 family inet address 1.1.0.2/30 set interfaces fe-1/2/1 unit 4 family inet address 1.1.1.2/30 set interfaces fe-1/2/2 unit 5 family inet address 1.12.0.1/30 set interfaces lo0 unit 2 family inet address 10.255.71.24/32 set protocols bgp accept-remote-nexthop set protocols bgp group ext type external set protocols bgp group ext import agg_route set protocols bgp group ext peer-as 65500 set protocols bgp group ext multipath set protocols bgp group ext neighbor 1.1.0.1 set protocols bgp group ext neighbor 1.1.1.1 set protocols bgp group int type internal set protocols bgp group int local-address 10.255.71.24 set protocols bgp group int neighbor 10.255.14.177 set protocols ospf area 0.0.0.0 interface fe-1/2/1.4 set protocols ospf area 0.0.0.0 interface 10.255.71.24 set policy-options policy-statement agg_route term 1 from protocol bgp set policy-options policy-statement agg_route term 1 from route-filter 1.1.230.0/23 exact set policy-options policy-statement agg_route term 1 then next-hop 1.1.10.10 set policy-options policy-statement agg_route term 1 then accept set routing-options autonomous-system 65000
设备 R2
set interfaces fe-1/2/0 unit 6 family inet address 1.12.0.2/30 set interfaces lo0 unit 3 family inet address 10.255.14.177/32 set protocols bgp group int type internal set protocols bgp group int local-address 10.255.14.177 set protocols bgp group int neighbor 10.255.71.24 set protocols ospf area 0.0.0.0 interface fe-1/2/0.6 set protocols ospf area 0.0.0.0 interface 10.255.14.177 set routing-options autonomous-system 65000
设备 R0
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置设备 R0：
配置接口。
[edit interfaces fe-1/2/0 unit 1] user@R0# set family inet address 1.1.0.1/30 [edit interfaces fe-1/2/1 unit 2] user@R0# set family inet address 1.1.1.1/30 [edit interfaces lo0 unit 1] user@R0# set family inet address 10.255.14.179/32
配置 EBGP。
[edit protocols bgp group ext] user@R0# set type external user@R0# set peer-as 65000 user@R0# set neighbor 1.1.0.2 user@R0# set neighbor 1.1.1.2
在设备 R0 与设备 R1 之间启用多路径 BGP。
[edit protocols bgp group ext] user@R0# set multipath
配置远程网络的静态路由。 这些路由不是拓扑的一部分。这些路由的目的在于演示此示例中的功能。
[edit routing-options] user@R0# set static route 1.1.10.10/32 reject user@R0# set static route 1.1.230.0/23 reject
配置接受静态路由的路由策略。
[edit policy-options policy-statement agg_route term 1] user@R0# set from protocol static user@R0# set from route-filter 1.1.230.0/23 exact user@R0# set then accept [edit policy-options policy-statement test_route term 1] user@R0# set from protocol static user@R0# set from route-filter 1.1.10.10/32 exact user@R0# set then accept
将路由
agg_route表test_route中的和策略导出至 BGP。[edit protocols bgp group ext] user@R0# set export test_route user@R0# set export agg_route
配置自治系统（AS）编号。
[edit routing-options] user@R0# set autonomous-system 65500
成果
从配置模式， show interfaces输入、 show policy-optionsshow protocols、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R0# show interfaces
fe-1/2/0 {
unit 1 {
family inet {
address 1.1.0.1/30;
}
}
}
fe-1/2/1 {
unit 2 {
family inet {
address 1.1.1.1/30;
}
}
}
lo0 {
unit 1 {
family inet {
address 10.255.14.179/32;
}
}
}
user@R0# show policy-options
policy-statement agg_route {
term 1 {
from {
protocol static;
route-filter 1.1.230.0/23 exact;
}
then accept;
}
}
policy-statement test_route {
term 1 {
from {
protocol static;
route-filter 1.1.10.10/32 exact;
}
then accept;
}
}
user@R0# show protocols
bgp {
group ext {
type external;
export [ test_route agg_route ];
peer-as 65000;
multipath;
neighbor 1.1.0.2;
neighbor 1.1.1.2;
}
}
user@R0# show routing-options
static {
route 1.1.10.10/32 reject;
route 1.1.230.0/23 reject;
}
autonomous-system 65500;
如果您完成了设备配置，请从commit配置模式进入。
配置设备 R1
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置设备 R1：
配置接口。
[edit interfaces fe-1/2/0 unit 3] user@R1# set family inet address 1.1.0.2/30 [edit interfaces fe-1/2/1 unit 4] user@R1# set family inet address 1.1.1.2/30 [edit interfaces fe-1/2/2 unit 5] user@R1# set family inet address 1.12.0.1/30 [edit interfaces lo0 unit 2] user@R1# set family inet address 10.255.71.24/32
配置 OSPF。
[edit protocols ospf area 0.0.0.0] user@R1# set interface fe-1/2/1.4 user@R1# set interface 10.255.71.24
启用设备 R1 以接受远程下一跳跃。
[edit protocols bgp] user@R1# set accept-remote-nexthop
配置 IBGP。
[edit protocols bgp group int] user@R1# set type internal user@R1# set local-address 10.255.71.24 user@R1# set neighbor 10.255.14.177
配置 EBGP。
[edit protocols bgp group ext] user@R1# set type external user@R1# set peer-as 65500 user@R1# set neighbor 1.1.0.1 user@R1# set neighbor 1.1.1.1
在设备 R0 与设备 R1 之间启用多路径 BGP。
[edit protocols bgp group ext] user@R1# set multipath
配置路由策略，使单跳外部 BGP 对等体（设备 R1）接受远程下一中继站1.1.10.10，以便路由到 1.1.230.0/23 网络。
[edit policy-options policy-statement agg_route term 1] user@R1# set from protocol bgp user@R1# set from route-filter 1.1.230.0/23 exact user@R1# set then next-hop 1.1.10.10 user@R1# set then accept
将
agg_route策略导入设备 R1 上的路由表中。[edit protocols bgp group ext] user@R1# set import agg_route
配置自治系统（AS）编号。
[edit routing-options] user@R1# set autonomous-system 65000
成果
从配置模式， show interfaces输入、 show policy-optionsshow protocols、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R1# show interfaces
fe-1/2/0 {
unit 3 {
family inet {
address 1.1.0.2/30;
}
}
}
fe-1/2/1 {
unit 4 {
family inet {
address 1.1.1.2/30;
}
}
}
fe-1/2/2 {
unit 5 {
family inet {
address 1.12.0.1/30;
}
}
}
lo0 {
unit 2 {
family inet {
address 10.255.71.24/32;
}
}
}
user@R1# show policy-options
policy-statement agg_route {
term 1 {
from {
protocol bgp;
route-filter 1.1.230.0/23 exact;
}
then {
next-hop 1.1.10.10;
accept;
}
}
}
user@R1# show protocols
bgp {
accept-remote-nexthop;
group ext {
type external;
import agg_route;
peer-as 65500;
multipath;
neighbor 1.1.0.1;
neighbor 1.1.1.1;
}
group int {
type internal;
local-address 10.255.71.24;
neighbor 10.255.14.177;
}
}
ospf {
area 0.0.0.0 {
interface fe-1/2/1.4;
interface 10.255.71.24;
}
}
user@R1# show routing-options autonomous-system 65000;
如果您完成了设备配置，请从commit配置模式进入。
配置设备 R2
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
配置设备 R2：
配置接口。
[edit interfaces fe-1/2/0 unit 6] user@R2# set family inet address 1.12.0.2/30 [edit interfaces lo0 unit 3] user@R2# set family inet address 10.255.14.177/32
配置 OSPF。
[edit protocols ospf area 0.0.0.0] user@R2# set interface fe-1/2/0.6 user@R2# set interface 10.255.14.177
配置 IBGP。
[edit protocols bgp group int] user@R2# set type internal user@R2# set local-address 10.255.14.177 user@R2# set neighbor 10.255.71.24
配置自治系统（AS）编号。
[edit routing-options] user@R1# set autonomous-system 65000
成果
从配置模式，输入show interfaces、 show protocols和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R2# show interfaces
fe-1/2/0 {
unit 6 {
family inet {
address 1.12.0.2/30;
}
}
}
lo0 {
unit 3 {
family inet {
address 10.255.14.177/32;
}
}
}
user@R2# show protocols
bgp {
group int {
type internal;
local-address 10.255.14.177;
neighbor 10.255.71.24;
}
}
ospf {
area 0.0.0.0 {
interface fe-1/2/0.6;
interface 10.255.14.177;
}
}
user@R2# show routing-options autonomous-system 65000;
如果您完成了设备配置，请从commit配置模式进入。
针对
确认配置是否正常工作。
验证具有间接下一跳跃的多路径路由是否位于路由表中
用途
验证设备 R1 是否有到 1.1.230.0/23 网络的路由。
行动
在操作模式下，输入show route 1.1.230.0 extensive命令。
user@R1> show route 1.1.230.0 extensive
inet.0: 11 destinations, 13 routes (11 active, 0 holddown, 0 hidden)
Restart Complete
1.1.230.0/23 (2 entries, 1 announced)
TSI:
KRT in-kernel 1.1.230.0/23 -> {indirect(262142)}
Page 0 idx 1 Type 1 val 9168f6c
Nexthop: 1.1.10.10
Localpref: 100
AS path: [65000] 65500 I
Communities:
Path 1.1.230.0 from 1.1.0.1 Vector len 4. Val: 1
*BGP Preference: 170/-101
Next hop type: Indirect
Address: 0x90c44d8
Next-hop reference count: 4
Source: 1.1.0.1
Next hop type: Router, Next hop index: 262143
Next hop: 1.1.0.1 via fe-1/2/0.3, selected
Next hop: 1.1.1.1 via fe-1/2/2.5
Protocol next hop: 1.1.10.10
Indirect next hop: 91c0000 262142
State: <Active Ext>
Local AS: 65000 Peer AS: 65500
Age: 2:55:31 Metric2: 0
Task: BGP_65500.1.1.0.1+64631
Announcement bits (3): 2-KRT 3-BGP_RT_Background 4-Resolve tree 1
AS path: 65500 I
Accepted Multipath
Localpref: 100
Router ID: 10.255.14.179
Indirect next hops: 1
Protocol next hop: 1.1.10.10
Indirect next hop: 91c0000 262142
Indirect path forwarding next hops: 2
Next hop type: Router
Next hop: 1.1.0.1 via fe-1/2/0.3
Next hop: 1.1.1.1 via fe-1/2/2.5
1.1.10.10/32 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 2
Nexthop: 1.1.0.1 via fe-1/2/0.3
Nexthop: 1.1.1.1 via fe-1/2/2.5
BGP Preference: 170/-101
Next hop type: Indirect
Address: 0x90c44d8
Next-hop reference count: 4
Source: 1.1.1.1
Next hop type: Router, Next hop index: 262143
Next hop: 1.1.0.1 via fe-1/2/0.3, selected
Next hop: 1.1.1.1 via fe-1/2/2.5
Protocol next hop: 1.1.10.10
Indirect next hop: 91c0000 262142
State: <NotBest Ext>
Inactive reason: Not Best in its group - Update source
Local AS: 65000 Peer AS: 65500
Age: 2:55:27 Metric2: 0
Task: BGP_65500.1.1.1.1+53260
AS path: 65500 I
Accepted
Localpref: 100
Router ID: 10.255.14.179
Indirect next hops: 1
Protocol next hop: 1.1.10.10
Indirect next hop: 91c0000 262142
Indirect path forwarding next hops: 2
Next hop type: Router
Next hop: 1.1.0.1 via fe-1/2/0.3
Next hop: 1.1.1.1 via fe-1/2/2.5
1.1.10.10/32 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 2
Nexthop: 1.1.0.1 via fe-1/2/0.3
Nexthop: 1.1.1.1 via fe-1/2/2.5含义
输出显示，设备 R1 具有启用了多路径功能的1.1.230.0 网络的路由（Accepted Multipath）。输出还显示路由具有间接的下一跳跃1.1.10.10。
停用和重新激活接受-远程 nexthop 声明
用途
停用accept-remote-nexthop语句时，请确保从路由表中卸下带有间接下一跳跃的多路径路由。
行动
在配置模式下，输入
deactivate protocols bgp accept-remote-nexthop命令。user@R1# deactivate protocols bgp accept-remote-nexthop user@R1# commit
在操作模式下，输入
show route 1.1.230.0命令。user@R1> show route 1.1.230.0
从配置模式中，通过输入
activate protocols bgp accept-remote-nexthop命令重新激活该语句。user@R1# activate protocols bgp accept-remote-nexthop user@R1# commit
从操作模式中重新输入
show route 1.1.230.0命令。user@R1> show route 1.1.230.0 inet.0: 11 destinations, 13 routes (11 active, 0 holddown, 0 hidden) Restart Complete + = Active Route, - = Last Active, * = Both 1.1.230.0/23 *[BGP/170] 03:13:19, localpref 100 AS path: 65500 I > to 1.1.0.1 via fe-1/2/0.3 to 1.1.1.1 via fe-1/2/2.5 [BGP/170] 03:13:15, localpref 100, from 1.1.1.1 AS path: 65500 I > to 1.1.0.1 via fe-1/2/0.3 to 1.1.1.1 via fe-1/2/2.5
含义
停用accept-remote-nexthop该语句时，将从路由表中删除到1.1.230.0 网络的多路径路由。
了解分配给路径的带宽不相等的 BGP 流量的负载平衡
多路径选项从活动路由决策流程中删除 tiebreakers，从而允许从要安装到转发表的多个来源获知的其他成本 BGP 路由。但是，当可用路径不是相同的成本时，您可能希望以非对称方式对流量进行负载平衡。
在转发表中安装多个下一跃点后，Junos OS 按前缀的负载平衡算法选择特定转发下一个跳跃。该进程会针对数据包的源地址和目标地址进行散列，以确定性地将前缀对映射到可用的下一跃点之一。当为哈希功能提供大量前缀（例如，可能出现在 Internet 对等互连交换上）时，每前缀映射的效果最佳，并且可防止通信节点对之间的数据包重新排序。
企业网络通常想要改变 evoke每个数据包负载平衡算法的默认行为。这里强调的是每数据包，因为其使用 misnomer 原始互联网处理器 ASIC 的历史行为。事实上，当前瞻博网络路由器支持按前缀（默认）和按流量负载平衡。后者包含针对各种第3层和第4层标头进行哈希处理，包括源地址、目标地址、传输协议、传入接口和应用程序端口的某些部分。其效果是，现在将单个流散列到一个特定的下一跳跃，从而在可用的下一个跳跃之间实现更多分布，特别是在较少的源和目标对之间进行路由时。
借助按数据包负载平衡，在两个端点之间组成通信流的数据包可能是 resequenced，而单个流内的数据包则保持正确的顺序。无论您选择按前缀，还是按数据包负载平衡，访问链路的不对称性都可能带来技术挑战。无论采用哪种方式，当与映射到的流（例如快速以太网接入链路）相比，映射到 T1 链路的前缀或流将表现出性能下降。更糟的是，如果流量负载很重，则任何相等负载平衡的尝试都可能会导致 T1 链路的总饱和量和数据包丢失造成的会话中断。
幸运的是，瞻博网络的 BGP 实施支持带宽社区的概念。此扩展型社区对给定下一个跳跃的带宽进行编码，并在与多路径相结合时，负载平衡算法在一组下一跃点之间分配流量，与相对带宽成正比。换句话说，如果您有 10 Mbps 和 1 Mbps 的下一跳跃，则平均九个流量将映射到使用低速度的每个流的高速下一跳跃。
只有按数据包的负载平衡支持使用 BGP 带宽社区。
配置任务包括两个部分：
配置外部 BGP （EBGP）对等会话，启用多路径，并定义导入策略，以便使用可反映链路速度的带宽团体标记路由。
启用按数据包（实际上是按流量）负载平衡以实现信息流的最佳分布。
另请参阅
示例：分配给路径的带宽不相等的负载平衡 BGP 流量
此示例演示如何将 BGP 配置为选择多个不等成本路径作为活动路径。
BGP 社区可帮助您控制路由策略。BGP 社区的一个好用示例是不相等的负载平衡。当自治系统边界路由器（ASBR）收到来自直接连接外部 BGP （EBGP）邻居的路由时，ASBR 然后使用 IBGP 通告将这些路由公布到内部邻居中。在 IBGP adverisements 中，您可以连接链路带宽社区以传达公布的外部链路的带宽。当多个外部链路可用，并且您想要在链路上执行不相等的负载平衡时，这是很有用的。您可在 AS 的所有入口链路上配置链路带宽扩展社区。链路带宽扩展社区中的带宽信息基于 EBGP 链路的配置带宽。它不基于链路上的流量量。Junos OS支持BGP链路带宽和多路径负载平衡，如互联网草案 draft-ietf-idr-link-bandwidth-06、 BGP 链路带宽扩展社区 中所述。请注意，即使draft-ietf-idr-link-bandwidth-06指定不可传递的社区，Junos OS 实施也限于可传递社区。
要求
开始之前：
配置设备接口。
配置内部网关协议（IGP）。
配置 BGP。
将路由策略（例如直接路由或 IGP 路由）从路由表中配置为将路由导出到 BGP 中。
概述
在此例中，设备 R1 在 AS 64500 中，并且连接到设备 R2 和设备 R3，两者均在 AS 64501 中。
该示例使用带宽扩展社区。
默认情况下，使用 BGP 多路径时，将在计算的多个路径中平均分配流量。带宽扩展的社区允许向 BGP 路径添加额外的属性，从而允许 unequally 分布式信息流。主要应用是具有非对称带宽功能的给定网络存在多个外部路径的情况。在此类情况下，您可以标记带宽扩展社区接收的路由。当 BGP 多路径（内部或外部）在包含带宽属性的路由之间运行时，转发引擎可根据与每个路径对应的带宽 unequally 分配流量。
当 BGP 有多个候选路径可用于多路径目的时，除非所有候选路径都具有此属性，否则 BGP 不会根据带宽社区执行不相等的成本负载平衡。
带宽扩展社区的适用性受以下限制限制： BGP 多路径接受多个路径进行考虑。在执行负载平衡的路由器与多个出口点之间，IGP 距离显式地为 BGP。这可通过使用不跟踪相应 IGP 指标的标签交换路径（Lsp）的全网状来实现。但是，在电路的传播延迟非常大的网络中（例如，如果存在长距离电路），通常需要考虑不同路径的延迟特征。
按如下方式配置带宽社区：
[edit policy-options] user@host# set community members bandwidth:[1-65535]:[0-4294967295]
第一个16位数字代表本地自治系统。第二个32位数字表示链路带宽（以字节数/秒为单位）。
例如：
[edit policy-options] user@host# show community bw-t1 members bandwidth:10458:193000; community bw-t3 members bandwidth:10458:5592000; community bw-oc3 members bandwidth:10458:19440000;
其中10458是本地 AS 编号。这些值对应于 T1、T3 和 OC-3 路径的带宽（以字节/秒为单位）。指定为带宽值的值无需与特定接口的实际带宽相对应。使用的平衡系数作为指定总带宽的功能计算。要使用此扩展社区标记路由，请定义策略声明，如下所示：
[edit policy-options]
user@host# show
policy-statement link-bw-t1 {
then {
community set bw-t1;
}
accept;
}
将此作为对称带宽链路所面向的 BGP 对等会话的导入策略。尽管在理论中，社区属性可以在网络中的任何位置添加或删除，但在上述情况下，将社区用作外部链接的 EBGP 对等会话中的导入策略，从而允许该属性影响本地多路径决策，并且可能更容易管理。
配置
操作
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，然后将命令复制并粘贴到[edit]层次结构级别的 CLI 中。
设备 R1
set interfaces ge-1/2/0 unit 0 description R1->R3 set interfaces ge-1/2/0 unit 0 family inet address 10.0.0.1/30 set interfaces ge-1/2/1 unit 0 description R1->R2 set interfaces ge-1/2/1 unit 0 family inet address 10.0.1.2/30 set interfaces lo0 unit 0 family inet address 192.168.0.1/32 set protocols bgp group external type external set protocols bgp group external import bw-dis set protocols bgp group external peer-as 64501 set protocols bgp group external multipath set protocols bgp group external neighbor 10.0.1.1 set protocols bgp group external neighbor 10.0.0.2 set policy-options policy-statement bw-dis term a from protocol bgp set policy-options policy-statement bw-dis term a from neighbor 10.0.1.1 set policy-options policy-statement bw-dis term a then community add bw-high set policy-options policy-statement bw-dis term a then accept set policy-options policy-statement bw-dis term b from protocol bgp set policy-options policy-statement bw-dis term b from neighbor 10.0.0.2 set policy-options policy-statement bw-dis term b then community add bw-low set policy-options policy-statement bw-dis term b then accept set policy-options policy-statement loadbal from route-filter 10.0.0.0/16 orlonger set policy-options policy-statement loadbal then load-balance per-packet set policy-options community bw-high members bandwidth:65000:60000000 set policy-options community bw-low members bandwidth:65000:40000000 set routing-options autonomous-system 64500 set routing-options forwarding-table export loadbal
设备 R2
set interfaces ge-1/2/0 unit 0 description R2->R1 set interfaces ge-1/2/0 unit 0 family inet address 10.0.1.1/30 set interfaces ge-1/2/1 unit 0 description R2->R3 set interfaces ge-1/2/1 unit 0 family inet address 10.0.2.2/30 set interfaces ge-1/2/1 unit 0 family iso set interfaces lo0 unit 0 family inet address 192.168.0.2/32 set interfaces lo0 unit 0 family iso address 49.0001.1921.6800.0002.00 set protocols bgp group external type external set protocols bgp group external export bgp-default set protocols bgp group external export send-direct set protocols bgp group external peer-as 64500 set protocols bgp group external multipath set protocols bgp group external neighbor 10.0.1.2 set protocols isis interface ge-1/2/1.0 set protocols isis interface lo0.0 set policy-options policy-statement bgp-default from protocol static set policy-options policy-statement bgp-default from route-filter 172.16.0.0/16 exact set policy-options policy-statement bgp-default then accept set policy-options policy-statement send-direct term 1 from protocol direct set policy-options policy-statement send-direct term 1 then accept set routing-options static route 172.16.0.0/16 discard set routing-options static route 172.16.0.0/16 no-install set routing-options autonomous-system 64501
设备 R3
set interfaces ge-1/2/0 unit 0 description R3->R2 set interfaces ge-1/2/0 unit 0 family inet address 10.0.2.1/30 set interfaces ge-1/2/0 unit 0 family iso set interfaces ge-1/2/1 unit 0 description R3->R1 set interfaces ge-1/2/1 unit 0 family inet address 10.0.0.2/30 set interfaces lo0 unit 0 family inet address 192.168.0.3/32 set interfaces lo0 unit 0 family iso address 49.0001.1921.6800.0003.00 set protocols bgp group external type external set protocols bgp group external export send-direct set protocols bgp group external export bgp-default set protocols bgp group external peer-as 64500 set protocols bgp group external multipath set protocols bgp group external neighbor 10.0.0.1 set protocols isis interface ge-1/2/0.0 set protocols isis interface lo0.0 set policy-options policy-statement bgp-default from protocol static set policy-options policy-statement bgp-default from route-filter 172.16.0.0/16 exact set policy-options policy-statement bgp-default then accept set policy-options policy-statement send-direct term 1 from protocol direct set policy-options policy-statement send-direct term 1 then accept set routing-options static route 172.16.0.0/16 discard set routing-options static route 172.16.0.0/16 no-install set routing-options autonomous-system 64501
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置 BGP 对等体会话：
配置接口。
user@R1# set ge-1/2/0 unit 0 description R1->R3 user@R1# set ge-1/2/0 unit 0 family inet address 10.0.0.1/30 user@R1# set ge-1/2/1 unit 0 description R1->R2 user@R1# set ge-1/2/1 unit 0 family inet address 10.0.1.2/30 user@R1# set lo0 unit 0 family inet address 192.168.0.1/32
配置 BGP 组。
[edit protocols bgp group external] user@R1# set type external user@R1# set import bw-dis user@R1# set peer-as 64501 user@R1# set neighbor 10.0.1.1 user@R1# set neighbor 10.0.0.2
使 BGP 组可以使用多个路径。
注：要禁用要求 BGP 多路径接受的路径必须具有相同邻接自治系统（AS）的默认检查，请包含
multiple-as选项。如果邻居multiple-as处于不同的 as，请使用该选项。[edit protocols bgp group external] user@R1# set multipath
配置负载平衡策略。
[edit policy-options policy-statement loadbal] user@R1# set from route-filter 10.0.0.0/16 orlonger user@R1# set then load-balance per-packet
应用负载平衡策略。
[edit routing-options] user@R1# set forwarding-table export loadbal
配置 BGP 社区成员。
此示例假定带宽为 1 Gbps，并将 60% 分配为黑白、高达 40% 和 bw-低。参考带宽无需与链路带宽相同。
[edit policy-options] user@R1# set community bw-high members bandwidth:65000:60000000 user@R1# set community bw-low members bandwidth:65000:40000000
配置带宽分配策略。
[edit policy-options bw-dis] user@R1# set term a from protocol bgp user@R1# set term a from neighbor 10.0.1.1 user@R1# set term a then community add bw-high user@R1# set term a then accept user@R1# set term b from protocol bgp user@R1# set term b from neighbor 10.0.0.2 user@R1# set term b then community add bw-low user@R1# set term b then accept
配置本地自治系统（AS）编号。
[edit routing-options] user@R1# set autonomous-system 64500
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R1# show interfaces
ge-1/2/0 {
unit 0 {
description R1->R3;
family inet {
address 10.0.0.1/30;
}
}
}
ge-1/2/1 {
unit 0 {
description R1->R2;
family inet {
address 10.0.1.2/30;
}
}
}
lo0 {
unit 0 {
family inet {
address 192.168.0.1/32;
}
}
}
user@R1# show protocols
bgp {
group external {
type external;
import bw-dis;
peer-as 64501;
multipath;
neighbor 10.0.1.1;
neighbor 10.0.0.2;
}
}
user@R1# show policy-options
policy-statement bw-dis {
term a {
from {
protocol bgp;
neighbor 10.0.1.1;
}
then {
community add bw-high;
accept;
}
}
term b {
from {
protocol bgp;
neighbor 10.0.0.2;
}
then {
community add bw-low;
accept;
}
}
}
policy-statement loadbal {
from {
route-filter 10.0.0.0/16 orlonger;
}
then {
load-balance per-packet;
}
}
community bw-high members bandwidth:65000:60000000;
community bw-low members bandwidth:65000:40000000;
user@R1# show routing-options
autonomous-system 64500;
forwarding-table {
export loadbal;
}
如果您完成了设备配置，请从commit配置模式进入。
针对
确认配置是否正常工作：
验证路由
用途
确认选择了两个路由，并且路由上的下一个跃点显示的余额为 60%/40%。
行动
从操作模式运行show route protocol bgp detail 命令。
user@R1> show route 172.16/16 protocol bgp detail
inet.0: 9 destinations, 13 routes (9 active, 0 holddown, 0 hidden)
172.16.0.0/16 (2 entries, 1 announced)
*BGP Preference: 170/-101
Next hop type: Router, Next hop index: 262143
Address: 0x93fc078
Next-hop reference count: 3
Source: 10.0.0.2
Next hop: 10.0.0.2 via ge-1/2/0.0 balance 40%
Next hop: 10.0.1.1 via ge-1/2/1.0 balance 60%, selected
State: **Active Ext>
Local AS: 64500 Peer AS: 64501
Age: 3:22:55
Task: BGP_64501.10.0.0.2+55344
Announcement bits (1): 0-KRT
AS path: 64501 I
Communities: bandwidth:65000:40000000
Accepted Multipath
Localpref: 100
Router ID: 192.168.0.3
BGP Preference: 170/-101
Next hop type: Router, Next hop index: 658
Address: 0x9260520
Next-hop reference count: 4
Source: 10.0.1.1
Next hop: 10.0.1.1 via ge-1/2/1.0, selected
State: <NotBest Ext>
Inactive reason: Not Best in its group - Active preferred
Local AS: 64500 Peer AS: 64501
Age: 3:22:55
Task: BGP_65001.10.0.1.1+62586
AS path: 64501 I
Communities: bandwidth:65000:60000000
Accepted MultipathContrib
Localpref: 100
Router ID: 192.168.0.2user@R1> show route 10.0.2.0 protocol bgp detail
inet.0: 9 destinations, 13 routes (9 active, 0 holddown, 0 hidden)
10.0.2.0/30 (2 entries, 1 announced)
*BGP Preference: 170/-101
Next hop type: Router, Next hop index: 262143
Address: 0x93fc078
Next-hop reference count: 3
Source: 10.0.1.1
Next hop: 10.0.0.2 via ge-1/2/0.0 balance 40%
Next hop: 10.0.1.1 via ge-1/2/1.0 balance 60%, selected
State: <Active Ext>
Local AS: 64500 Peer AS: 64501
Age: 3:36:37
Task: BGP_65001.10.0.1.1+62586
Announcement bits (1): 0-KRT
AS path: 64501 I
Communities: bandwidth:65000:60000000
Accepted Multipath
Localpref: 100
Router ID: 192.168.0.2
BGP Preference: 170/-101
Next hop type: Router, Next hop index: 657
Address: 0x92604d8
Next-hop reference count: 4
Source: 10.0.0.2
Next hop: 10.0.0.2 via ge-1/2/0.0, selected
State: <NotBest Ext>
Inactive reason: Not Best in its group - Active preferred
Local AS: 64500 Peer AS: 65001
Age: 3:36:36
Task: BGP_65001.10.0.0.2+55344
AS path: 64501 I
Communities: bandwidth:65000:40000000
Accepted MultipathContrib
Localpref: 100
Router ID: 192.168.0.3含义
活动路径（用星号（*）表示）有两个下一个跃点：10.0.1.1 和10.0.0.2 到 172.16/16 目的地。
同样，以星号（*）表示的活动路径还有两个下一个跃点：10.0.1.1 和10.0.0.2 到10.0.2.0 目标。
在这两种情况下，10.0.1.1 next 跳跃都将从非活动路径复制到活动状态。
40% 和 60% 的余额显示在show route输出中。这表示信息流正在两个下一跃点之间分配，并且该流量在第一个路径之后为 60%，而 40% 则位于第二个路径之后。
在外部 BGP 链路上通告聚合带宽，以实现负载平衡概述
从其内部对等方负载中接收多个路径的 BGP 对等体这些路径之间的流量。在之前的 Junos OS 版本中，从其内部对端接收多个路径的 BGP 发言者仅通告与活动路由关联的链路带宽。BGP 使用链路带宽扩展社区，通告跨外部链路的多个路由的聚合带宽。BGP 计算带宽分配不相等的 multipaths 的聚合带宽，并向外部 BGP 对等方通告聚合带宽。可以配置聚合带宽的阈值，以限制 BGP 组的带宽使用。IPv4 和 IPv6 路由（包括任意广播地址）都支持聚合带宽。
要播发多路径路由的聚合带宽并设置最大阈值，请配置策略，然后在 aggregate-bandwidthlimit-bandwidth [edit policy-options policy-statement name， then] 层次结构级别配置策略和操作。
图 4： 在外部 BGP 链路上通告聚合带宽以实现负载平衡
在 中，自治系统 1 （AS1） 将其 3 个多路径路由的带宽聚合到远程前缀，然后使用链路带宽扩展社区以 30 的带宽通告自治系统 图 4 4 （AS4）。如果在 AS3 和 AS4 之间出现链路故障，AS4 将60从其公布的带宽中减去到 AS6，并修改从130到70的广告带宽。
当 BGP 对等体传播使用聚合带宽社区配置的多路径路由时，将添加一个新链路带宽社区，其中包含传入带宽社区或该前缀的带宽总和。可用链路带宽从接口速度动态地派生而来。链路带宽以可传递扩展社区的形式发送。但是，如果设备将链路带宽作为非可传递链路带宽扩展社区接收，Junos OS 会忽略此社区，但会将其与可传递链路带宽扩展社区一起传播。如果每个传入多路径路由都未收到链路带宽社区，则链路带宽社区不会公布到其外部对等方。
当其中一个多路径链路发生故障时，BGP readvertises 从传出链路带宽社区减去发生故障链路带宽的路由。如果发现聚合链路带宽超过配置的限制，则通告的聚合带宽将被截断为两个对等方之间配置的链路带宽限制。
另请参阅
示例：配置策略以在外部 BGP 链路上通告聚合带宽以实现负载平衡
此示例说明如何配置策略以在外部 BGP 链路上通告聚合带宽以实现负载平衡，并为配置的聚合带宽指定阈值。BGP 可增加 multipaths 的可用链路带宽并计算聚合带宽。如果链路发生故障，聚合带宽将调整以反映可用带宽的当前状态。
要求
此示例使用以下硬件和软件组件：
具有负载平衡功能的四个路由器
在所有设备上运行 Junos OS Release 17.4 或更高版本
概述
从 Junos OS Release 17.4 R1 开始，BGP 发言者从其内部对等方负载中接收多条路径，将平衡这些路径之间的流量。在之前的 Junos OS 版本中，从其内部对端接收多个路径的 BGP 发言者仅通告与活动路由关联的链路带宽。BGP 使用具有聚合带宽的新链路带宽扩展社区标记 multipaths，并在其停火区链路上通告这些多个路由的聚合带宽。要播发聚合多个路由，请配置策略，然后在 aggregate-bandwidthlimit bandwidth [edit policy-options policy-statement name] 层次结构级别中配置策略和操作。
拓扑
图 5： 配置策略以在外部 BGP 链路上通告聚合带宽以实现负载平衡
在 中，路由器 R1 负载通过路由器 R2 中的下一跃点 图 5 10.0.1.1（每秒 60，000，000 字节，以及路由器 R3 中的 40，000，000 字节/秒）平衡到远程目标的信息流。路由器 R1 向路由器 R 4 通告目标10.0.2.0。路由器 R1 计算可用带宽的聚合，每秒10000000字节。但是，在路由器 R1 上配置的策略将聚合带宽的阈值设置为每秒80000000字节。因此，R1 每秒公布80000000字节，而不是每秒的10000000字节数。
注：
如果其中一个多路径链路中断，则故障链路的带宽不会添加到已通告给 BGP 邻居的聚合带宽中。
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后从commit配置模式进入。
路由器 R1
set interfaces ge-0/0/0 unit 0 description R1->R3 set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.1/30 set interfaces ge-0/0/1 unit 0 description R1->R2 set interfaces ge-0/0/1 unit 0 family inet address 10.0.1.2/30 set interfaces ge-0/0/2 unit 0 description R1->R4 set interfaces ge-0/0/2 unit 0 family inet address 10.0.4.1/30 set interfaces lo0 unit 0 family inet address 192.168.0.1/32 set routing-options autonomous-system 65000 set protocols bgp group external type external set protocols bgp group external import bw-dis set protocols bgp group external peer-as 65001 set protocols bgp group external multipath set protocols bgp group external neighbor 10.0.1.1 set protocols bgp group external neighbor 10.0.0.2 set protocols bgp group external2 type external set protocols bgp group external2 peer-as 65002 set policy-options policy-statement bw-dis term a from protocol bgp set policy-options policy-statement bw-dis term a from neighbor 10.0.1.1 set policy-options policy-statement bw-dis term a then community add bw-high set policy-options policy-statement bw-dis term a then accept set policy-options policy-statement bw-dis term b from protocol bgp set policy-options policy-statement bw-dis term b from neighbor 10.0.0.2 set policy-options policy-statement bw-dis term b then community add bw-low set policy-options policy-statement bw-dis term b then accept set policy-options policy-statement aggregate_bw_and_limit_capacity then aggregate-bandwidth set policy-options policy-statement aggregate_bw_and_limit_capacity then limit-bandwidth 80000000 set policy-options policy-statement aggregate_bw_and_limit_capacity then accept set protocols bgp group external2 neighbor 10.0.4.2 export aggregate_bw_and_limit_capacity set policy-options policy-statement loadbal from route-filter 10.0.0.0/16 orlonger set policy-options policy-statement loadbal then load-balance per-packet set routing-options forwarding-table export loadbal set policy-options community bw-high members bandwidth:65000:60000000 set policy-options community bw-low members bandwidth:65000:40000000
路由器 R2
set interfaces ge-0/0/0 unit 0 description R2->R3 set interfaces ge-0/0/0 unit 0 family inet address 10.0.2.2/30 set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/1 unit 0 description R2->R1 set interfaces ge-0/0/1 unit 0 family inet address 10.0.1.1/30 set interfaces lo0 unit 0 family inet address 192.168.0.2/32 set interfaces lo0 unit 0 family iso address 49.0001.1921.6800.0002.00 set routing-options static route 172.16.0.0/16 discard set routing-options static route 172.16.0.0/16 no-install set routing-options autonomous-system 65001 set protocols bgp group external type external set protocols bgp group external export bgp-default set protocols bgp group external export send-direct set protocols bgp group external peer-as 65000 set protocols bgp group external multipath set protocols bgp group external neighbor 10.0.1.2 set protocols isis interface ge-0/0/0.0 set protocols isis interface lo0.0 set policy-options policy-statement bgp-default from protocol static set policy-options policy-statement bgp-default from route-filter 172.16.0.0/16 exact set policy-options policy-statement bgp-default then accept set policy-options policy-statement send-direct term 1 from protocol direct set policy-options policy-statement send-direct term 1 then accept
路由器 R3
set interfaces ge-0/0/0 description R3->R2 set interfaces ge-0/0/0 unit 0 family inet address 10.0.2.1/30 set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/1 unit 0 description R3->R1 set interfaces ge-0/0/1 unit 0 family inet address 10.0.0.2/30 set interfaces lo0 unit 0 family inet address 192.168.0.3/32 set interfaces lo0 unit 0 family iso address 49.0001.1921.6800.0003.00 set routing-options static route 172.16.0.0/16 discard set routing-options static route 172.16.0.0/16 no-install set routing-options autonomous-system 65001 set protocols bgp group external type external set protocols bgp group external export bgp-default set protocols bgp group external export send-direct set protocols bgp group external peer-as 65000 set protocols bgp group external multipath set protocols bgp group external neighbor 10.0.0.1 set protocols isis interface ge-0/0/0.0 set protocols isis interface lo0.0 set policy-options policy-statement bgp-default from protocol static set policy-options policy-statement bgp-default from route-filter 172.16.0.0/16 exact set policy-options policy-statement bgp-default then accept set policy-options policy-statement send-direct term 1 from protocol direct set policy-options policy-statement send-direct term 1 then accept
路由器 R 4
set interfaces ge-0/0/0 unit 0 description R4->R1 set interfaces ge-0/0/0 unit 0 family inet address 10.0.4.2/30 set interfaces lo0 unit 0 family inet address 192.168.0.4/32 set routing-options autonomous-system 65002 set protocols bgp group external type external set protocols bgp group external peer-as 65000 set protocols bgp group external neighbor 10.0.4.1
配置路由器，从 R1 开始
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航 CLI 的信息，请参阅Cli 用户指南中的使用配置模式中的 CLI 编辑器。
配置策略以通告聚合带宽到 BGP 对等方（从路由器 R1 开始）：
注：
修改相应的接口名称、地址和其他参数后，在路由器 R2、R3 和 R 4 上重复此过程。
使用 IPv4 地址配置接口。
[edit interfaces] user@R1# set ge-0/0/0 unit 0 description R1->R3 user@R1# set ge-0/0/0 unit 0 family inet address 10.0.0.1/30 user@R1# set ge-0/0/1 unit 0 description R1->R2 user@R1# set ge-0/0/1 unit 0 family inet address 10.0.1.2/30 user@R1# set ge-0/0/2 unit 0 description R1->R4 user@R1# set ge-0/0/2 unit 0 family inet address 10.0.4.1/30
配置环回地址。
[edit interfaces] user@R1# set lo0 unit 0 family inet address 192.168.0.1/32
为 BGP 主机配置自治系统。
[edit routing-options] user@R1# set autonomous-system 65000
在外部边缘路由器上配置 EBGP。
[edit protocols] user@R1# set bgp group external type external user@R1# set bgp group external import bw-dis user@R1# set bgp group external peer-as 65001 user@R1# set bgp group external multipath user@R1# set bgp group external neighbor 10.0.1.1 user@R1# set bgp group external neighbor 10.0.0.2 user@R1# set bgp group external2 type external user@R1# set bgp group external2 peer-as 65002
定义带宽分配策略，为目标为路由器 R3 的流量分配高带宽社区。
[edit policy-options] user@R1# set policy-statement bw-dis term a from protocol bgp user@R1# set policy-statement bw-dis term a from neighbor 10.0.1.1 user@R1# set policy-statement bw-dis term a then community add bw-high user@R1# set policy-statement bw-dis term a then accept
定义带宽分配策略，以便将低带宽社区分配到发往路由器 R2 的流量。
[edit policy-options] user@R1# set policy-statement bw-dis term b from protocol bgp user@R1# set policy-statement bw-dis term b from neighbor 10.0.0.2 user@R1# set policy-statement bw-dis term b then community add bw-low user@R1# set policy-statement bw-dis term b then accept
启用此功能可将80000000字节的聚合带宽公布到 BGP 个会话上的 EBGP 对等路由器 R 4。
[edit policy-options] user@R1# set policy-statement aggregate_bw_and_limit_capacity then aggregate-bandwidth user@R1# set policy-statement aggregate_bw_and_limit_capacity then limit-bandwidth 80000000 user@R1# set policy-statement aggregate_bw_and_limit_capacity then accept
将 aggregate_bw_and limit_capacity 策略应用于 EBGP group
external2。[edit protocols] user@R1# set bgp group external2 neighbor 10.0.4.2 export aggregate_bw_and_limit_capacity
定义负载平衡策略。
[edit policy-options] user@R1# set policy-statement loadbal from route-filter 10.0.0.0/16 orlonger user@R1# set policy-statement loadbal then load-balance per-packet
应用负载平衡策略。
[edit routing-options] user@R1# set forwarding-table export loadbal
配置 BGP 社区成员。第一个16位数字代表本地自治系统。第二个32位数字表示链路带宽（以字节数/秒为单位）。配置具有 60% 1-Gbps 链路的社区和另一个具有
bw-highbw-low40% 1-Gbps 链路的社区。将 1 Gbps 链路的 60% 配置为黑白-高，将 40% 设置为 bw 低的社区。
[edit policy-options] user@R1# set community bw-high members bandwidth:65000:60000000 user@R1# set community bw-low members bandwidth:65000:40000000
成果
从配置模式， show interfaces输入、 show protocolsshow routing-options、和show policy-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
[edit]
user@R1# show interfaces
interfaces {
ge-0/0/0 {
unit 0 {
description R1->R3;
family inet {
address 10.0.0.1/30;
}
}
}
ge-0/0/1 {
unit 0 {
description R1->R2;
family inet {
address 10.0.1.2/30;
}
}
}
ge-0/0/2 {
unit 0 {
description R1->R4;
family inet {
address 10.0.4.1/30;
}
}
}
lo0 {
unit 0 {
family inet {
address 192.168.0.1/32;
}
}
}
}
[edit]
user@R1# show protocols
protocols {
bgp {
group external {
type external;
import bw-dis;
peer-as 65001;
multipath;
neighbor 10.0.1.1;
neighbor 10.0.0.2;
}
group external2 {
type external;
peer-as 65002;
neighbor 10.0.4.2 {
export aggregate_bw_and_limit_capacity;
}
}
}
}
[edit]
user@R1# show routing-options
routing-options {
autonomous-system 65000;
forwarding-table {
export loadbal;
}
}
[edit]
user@R1# show policy-options
policy-options {
policy-statement bw-dis {
term a {
from {
protocol bgp;
neighbor 10.0.1.1;
}
then {
community add bw-high;
accept;
}
}
term b {
from {
protocol bgp;
neighbor 10.0.0.2;
}
then {
community add bw-low;
accept;
}
}
}
policy-statement aggregate_bw_and_limit_capacity {
then {
aggregate-bandwidth;
limit-bandwidth 80000000;
accept;
}
}
policy-statement loadbal {
from {
route-filter 10.0.0.0/16 orlonger;
}
then {
load-balance per-packet;
}
}
community bw-high members bandwidth:65000:60000000;
community bw-low members bandwidth:65000:40000000;
}
针对
验证是否建立 BGP 会话
用途
要验证 BGP 对等互连是否已完成，以及路由器之间是否建立了 BGP 会话
行动
user@R1> show bgp summary
Groups: 2 Peers: 3 Down peers: 0
Table Tot Paths Act Paths Suppressed History Damp State Pending
inet.0
12 8 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
10.0.0.2 65001 153 149 0 0 1:07:23 4/6/6/0 0/0/0/0
10.0.1.1 65001 229 226 0 0 1:41:44 4/6/6/0 0/0/0/0
10.0.4.2 65002 1227 1227 0 0 9:10:27 0/0/0/0 0/0/0/0
含义
路由器 R1 已完成与路由器 R2、R3 和 R 4 的对等连接。
验证每个路径中是否存在聚合带宽
用途
验证每个路由路径是否都存在扩展的社区。
行动
从操作模式运行show route protocol bgp detail命令。
user@R1> show route 10.0.2.0 protocol bgp detail
inet.0: 20 destinations, 26 routes (20 active, 0 holddown, 0 hidden)
10.0.2.0/30 (2 entries, 1 announced)
*BGP Preference: 170/-101
Next hop type: Router, Next hop index: 0
Address: 0xb618990
Next-hop reference count: 3
Source: 10.0.1.1
Next hop: 10.0.0.2 via ge-0/0/0.0 balance 40%
Session Id: 0x0
Next hop: 10.0.1.1 via ge-0/0/1.0 balance 60%, selected
Session Id: 0x0
State: <Active Ext>
Local AS: 65000 Peer AS: 65001
Age: 20:33
Validation State: unverified
Task: BGP_65001.10.0.1.1
Announcement bits (3): 0-KRT 2-BGP_Listen.0.0.0.0+179 3-BGP_RT_Background
AS path: 65001 I
Communities: bandwidth:65000:60000000
Accepted Multipath
Localpref: 100
Router ID: 128.49.121.137
BGP Preference: 170/-101
Next hop type: Router, Next hop index: 595
Address: 0xb7a1330
Next-hop reference count: 9
Source: 10.0.0.2
Next hop: 10.0.0.2 via ge-0/0/0.0, selected
Session Id: 0x141
State: <NotBest Ext>
Inactive reason: Not Best in its group - Active preferred
Local AS: 65000 Peer AS: 65001
Age: 20:33
Validation State: unverified
Task: BGP_65001.10.0.0.2
AS path: 65001 I
Communities: bandwidth:65000:40000000
Accepted MultipathContrib
Localpref: 100
Router ID: 128.49.121.132 含义
验证路由器 R1 是否正在通告其邻接路由器的聚合带宽 R 4
用途
验证路由器 R1 是否向其外部邻接方通告聚合带宽。
行动
user@R1> show route advertising-protocol bgp 10.0.4.2 10.0.2.0/30 detail
inet.0: 20 destinations, 26 routes (20 active, 0 holddown, 0 hidden)
* 10.0.2.0/30 (2 entries, 1 announced)
BGP group external2 type External
Nexthop: Self
AS path: [65000] 65001 I
Communities: bandwidth:65000:80000000
含义
路由器 R1 正在向其邻接方通告80000000字节的聚合带宽。
了解对 BGP 中单个目标的多条路径的通告
BGP 对等方在更新消息中通告彼此之间的路由。BGP 将其路由存储在 Junos OS 路由表（inet.0）中。对于路由表中的每个前缀，路由协议进程将选择一个称为活动路径的最佳路径。除非将 BGP 配置为向同一目标通告多个路径，否则 BGP 仅通告活动路径。
您可以将 BGP 配置为向目标通告多个路径，而不是仅公布到目标的活动路径。在自治系统（AS）内，到达目标的多个出口点的可用性具有以下优势：
容错 — 路径多样性可缩短故障后的恢复时间。例如，在为同一目标接收多条路径之后的边界可以预先计算备份路径并准备好，以便在主路径变为无效时，边界路由设备可以使用备份快速恢复连接。如果不使用备份路径，则恢复时间取决于 BGP 再融合，包括网络中的撤消和通告消息，在学习新的最佳路径之前也是如此。
负载平衡 — 如果流量内的路由满足某些限制，则多个路径可以到达同一目标，从而AS均衡流量负载。
维护 - 备用出口点的可用性允许路由器的平稳维护操作。
以下限制适用于在 BGP 中公布多个路由：
支持的地址族：
IPv4 单播（
family inet unicast）IPv6 单播（
family inet6 unicast）IPv4 标记为单播
family inet labeled-unicast（）IPv6 标记为单播
family inet6 labeled-unicast（）IPv4 VPN 单播（
family inet-vpn unicast）IPv6 VPN 单播（
family inet6-vpn unicast）
以下示例显示了 IPv4 VPN 单播和 IPv6 VPN 单播系列的配置：
bgp { group <group-name> { family inet-vpn unicast { add-path { send { include-backup-path include-backup-path; multipath; path-count path-count; path-selection-mode { (all-paths | equal-cost-paths); } prefix-policy [ policy-names ... ]; } receive; } family inet6-vpn unicast { add-path { send { include-backup-path include-backup-path; multipath; path-count path-count; path-selection-mode { (all-paths | equal-cost-paths); } prefix-policy [ policy-names ... ]; } receive; } } }在内部路由 （IBGP） BGP外部路由 （EBGP） 对等BGP上支持。我们支持默认接收的 EBGP 添加路径，以及由层级的配置语句发送的 EBGP 添加
[edit logical-systems logical-system-name protocols bgp group group-name family family]路径。仅限 Master 实例。不支持路由实例。
支持平滑重新启动和不间断活动路由（NSR）。
无 BGP 监控协议（BMP）支持。
通过使用前缀策略，您可以过滤已配置为向目标播发多个路径的路由器上的路由。前缀策略只能与前缀匹配。它们不能与路由属性匹配，也不能更改路由的属性。
从Junos OS版本18.4R1，BGP除了多个 ECMP 路径之外，还可以通告最多 2 个 添加路径路由。
要公布最多64添加路径或同等成本路径的所有添加通道，请在path-selection-mode[edit protocols bgp group group-name family name addpath send]层次结构级别上包括。您不能同时multipath同时path-selection-mode启用和。
另请参阅
示例：在 BGP 中公布多条路径
在此示例中，BGP 路由器配置为通告多个路径，而不是仅公布活动路径。RFC 7911 BGP中的多路径通告 中指定了多 条路径，BGP。
要求
此示例使用以下硬件和软件组件：
八个支持 BGP 的设备。
BGP 支持的五个设备不一定需要是路由器。例如，它们可以是 EX 系列以太网交换机。
BGP 支持的三个设备都配置为发送多个路径或接收多个路径（或者发送和接收多条路径）。这三个支持 BGP 的设备必须 M Series 多服务边缘路由器、MX 系列5G 通用路由平台或 T Series 核心路由器。
三台路由器必须运行 Junos OS 版本11.4 或更高版本。
概述
以下语句用于配置目标的多个路径：
[edit protocols bgp group group-name family family] add-path { receive; send { include-backup-path include-backup-path; multipath; path-count path-count; path-selection-mode { (all-paths | equal-cost-paths); } prefix-policy [ policy-names ... ]; } }
在此示例中，路由器 R5、路由器 R6 和路由器 R7 将静态路由重新分配给 BGP。路由器 R1 和路由器 R 4 是路由反射器。路由器 R2 和路由器 R3 是客户端路由反射器 R1。路由器 R8 是路由反射器 R 4 的客户端。
在 BGP 中启用多路径广告时，路由反射是可选的。
通过add-path send path-count 6配置，路由器 R1 配置为将多达6个路径（每个目的地）发送到路由器 r 4。
add-path receive配置后，路由器 r 4 配置为从路由器 R1 接收多个路径。
add-path send path-count 6配置后，路由器 r 4 配置为向路由器 R8 发送多达六条路径。
add-path receive配置后，路由器 R8 配置为从路由器 r 4 接收多个路径。
add-path send prefix-policy allow_199策略配置（以及相应的路由过滤器）将路由器 r 4 限制为仅为 172.16.199.1/32 路由发送多个路径。
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，然后将命令复制并粘贴到[edit]层次结构级别的 CLI 中。
路由器 R1
set interfaces fe-0/0/0 unit 12 family inet address 10.0.12.1/24 set interfaces fe-0/0/1 unit 13 family inet address 10.0.13.1/24 set interfaces fe-1/0/0 unit 14 family inet address 10.0.14.1/24 set interfaces fe-1/2/0 unit 15 family inet address 10.0.15.1/24 set interfaces lo0 unit 10 family inet address 10.0.0.10/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.10 set protocols bgp group rr cluster 10.0.0.10 set protocols bgp group rr neighbor 10.0.0.20 set protocols bgp group rr neighbor 10.0.0.30 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.15.2 local-address 10.0.15.1 set protocols bgp group e1 neighbor 10.0.15.2 peer-as 2 set protocols bgp group rr_rr type internal set protocols bgp group rr_rr local-address 10.0.0.10 set protocols bgp group rr_rr neighbor 10.0.0.40 family inet unicast add-path send path-count 6 set protocols ospf area 0.0.0.0 interface lo0.10 passive set protocols ospf area 0.0.0.0 interface fe-0/0/0.12 set protocols ospf area 0.0.0.0 interface fe-0/0/1.13 set protocols ospf area 0.0.0.0 interface fe-1/0/0.14 set protocols ospf area 0.0.0.0 interface fe-1/2/0.15 set routing-options router-id 10.0.0.10 set routing-options autonomous-system 1
路由器 R2
set interfaces fe-1/2/0 unit 21 family inet address 10.0.12.2/24 set interfaces fe-1/2/1 unit 26 family inet address 10.0.26.1/24 set interfaces lo0 unit 20 family inet address 10.0.0.20/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.20 set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.26.2 peer-as 2 set protocols ospf area 0.0.0.0 interface lo0.20 passive set protocols ospf area 0.0.0.0 interface fe-1/2/0.21 set protocols ospf area 0.0.0.0 interface fe-1/2/1.28 set policy-options policy-statement set_nh_self then next-hop self set routing-options autonomous-system 1
路由器 R3
set interfaces fe-1/0/1 unit 31 family inet address 10.0.13.2/24 set interfaces fe-1/0/2 unit 37 family inet address 10.0.37.1/24 set interfaces lo0 unit 30 family inet address 10.0.0.30/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.30 set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.37.2 peer-as 2 set protocols ospf area 0.0.0.0 interface lo0.30 passive set protocols ospf area 0.0.0.0 interface fe-1/0/1.31 set protocols ospf area 0.0.0.0 interface fe-1/0/2.37 set policy-options policy-statement set_nh_self then next-hop self set routing-options autonomous-system 1
路由器 R 4
set interfaces fe-1/2/0 unit 41 family inet address 10.0.14.2/24 set interfaces fe-1/2/1 unit 48 family inet address 10.0.48.1/24 set interfaces lo0 unit 40 family inet address 10.0.0.40/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.40 set protocols bgp group rr family inet unicast add-path receive set protocols bgp group rr neighbor 10.0.0.10 set protocols bgp group rr_client type internal set protocols bgp group rr_client local-address 10.0.0.40 set protocols bgp group rr_client cluster 10.0.0.40 set protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send path-count 6 set protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send prefix-policy allow_199 set protocols ospf area 0.0.0.0 interface fe-1/2/0.41 set protocols ospf area 0.0.0.0 interface lo0.40 passive set protocols ospf area 0.0.0.0 interface fe-1/2/1.48 set policy-options policy-statement allow_199 from route-filter 172.16.199.1/32 exact set policy-options policy-statement allow_199 term match_199 from prefix-list match_199 set policy-options policy-statement allow_199 then add-path send-count 20 set policy-options policy-statement allow_199 then accept set routing-options autonomous-system 1
路由器 R5
set interfaces fe-1/2/0 unit 51 family inet address 10.0.15.2/24 set interfaces lo0 unit 50 family inet address 10.0.0.50/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.15.1 export s2b set protocols bgp group e1 neighbor 10.0.15.1 peer-as 1 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then as-path-expand 2 set policy-options policy-statement s2b then accept set routing-options autonomous-system 2 set routing-options static route 172.16.199.1/32 reject set routing-options static route 172.16.198.1/32 reject
路由器 R6
set interfaces fe-1/2/0 unit 62 family inet address 10.0.26.2/24 set interfaces lo0 unit 60 family inet address 10.0.0.60/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.26.1 export s2b set protocols bgp group e1 neighbor 10.0.26.1 peer-as 1 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then accept set routing-options autonomous-system 2 set routing-options static route 172.16.199.1/32 reject set routing-options static route 172.16.198.1/32 reject
路由器 R7
set interfaces fe-1/2/0 unit 73 family inet address 10.0.37.2/24 set interfaces lo0 unit 70 family inet address 10.0.0.70/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.37.1 export s2b set protocols bgp group e1 neighbor 10.0.37.1 peer-as 1 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then accept set routing-options autonomous-system 2 set routing-options static route 172.16.199.1/32 reject
路由器 R8
set interfaces fe-1/2/0 unit 84 family inet address 10.0.48.2/24 set interfaces lo0 unit 80 family inet address 10.0.0.80/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.80 set protocols bgp group rr neighbor 10.0.0.40 family inet unicast add-path receive set protocols ospf area 0.0.0.0 interface lo0.80 passive set protocols ospf area 0.0.0.0 interface fe-1/2/0.84 set routing-options autonomous-system 1
配置路由器 R1
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置路由器 R1：
将接口配置为路由器 R2、路由器 R3、路由器 R 4 和路由器 R5，然后配置回传（lo0）接口。
[edit interfaces] user@R1# set fe-0/0/0 unit 12 family inet address 10.0.12.1/24 user@R1# set fe-0/0/1 unit 13 family inet address 10.0.13.1/24 user@R1# set fe-1/0/0 unit 14 family inet address 10.0.14.1/24 user@R1# set fe-1/2/0 unit 15 family inet address 10.0.15.1/24 user@R1#set lo0 unit 10 family inet address 10.0.0.10/32
在接口上配置 BGP，并配置 IBGP 路由反射。
[edit protocols bgp] user@R1# set group rr type internal user@R1# set group rr local-address 10.0.0.10 user@R1# set group rr cluster 10.0.0.10 user@R1# set group rr neighbor 10.0.0.20 user@R1# set group rr neighbor 10.0.0.30 user@R1# set group rr_rr type internal user@R1# set group rr_rr local-address 10.0.0.10 user@R1# set group e1 type external user@R1# set group e1 neighbor 10.0.15.2 local-address 10.0.15.1 user@R1# set group e1 neighbor 10.0.15.2 peer-as 2
配置路由器 R1，将最多六条路径发送至其相邻节点、路由器 R 4。
路径的目标可以是路由器 R1 可通过多个路径到达的任何目标。
[edit protocols bgp] user@R1# set group rr_rr neighbor 10.0.0.40 family inet unicast add-path send path-count 6
在接口上配置 OSPF。
[edit protocols ospf] user@R1# set area 0.0.0.0 interface lo0.10 passive user@R1# set area 0.0.0.0 interface fe-0/0/0.12 user@R1# set area 0.0.0.0 interface fe-0/0/1.13 user@R1# set area 0.0.0.0 interface fe-1/0/0.14 user@R1# set area 0.0.0.0 interface fe-1/2/0.15
配置路由器 ID 和自治系统编号。
[edit routing-options] user@R1# set router-id 10.0.0.10 user@R1# set autonomous-system 1
如果您完成了设备配置，请提交配置。
user@R1# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R1# show interfaces
fe-0/0/0 {
unit 12 {
family inet {
address 10.0.12.1/24;
}
}
}
fe-0/0/1 {
unit 13 {
family inet {
address 10.0.13.1/24;
}
}
}
fe-1/0/0 {
unit 14 {
family inet {
address 10.0.14.1/24;
}
}
}
fe-1/2/0 {
unit 15 {
family inet {
address 10.0.15.1/24;
}
}
}
lo0 {
unit 10 {
family inet {
address 10.0.0.10/32;
}
}
}
user@R1# show protocols
bgp {
group rr {
type internal;
local-address 10.0.0.10;
cluster 10.0.0.10;
neighbor 10.0.0.20;
neighbor 10.0.0.30;
}
group e1 {
type external;
neighbor 10.0.15.2 {
local-address 10.0.15.1;
peer-as 2;
}
}
group rr_rr {
type internal;
local-address 10.0.0.10;
neighbor 10.0.0.40 {
family inet {
unicast {
add-path {
send {
path-count 6;
}
}
}
}
}
}
}
ospf {
area 0.0.0.0 {
interface lo0.10 {
passive;
}
interface fe-0/0/0.12;
interface fe-0/0/1.13;
interface fe-1/0/0.14;
interface fe-1/2/0.15;
}
}
user@R1# show routing-options router-id 10.0.0.10; autonomous-system 1;
配置路由器 R2
分步过程
要配置路由器 R2：
将回传（lo0）接口和接口配置为路由器 R6 和路由器 R1。
[edit interfaces] user@R2# set fe-1/2/0 unit 21 family inet address 10.0.12.2/24 user@R2# set fe-1/2/1 unit 26 family inet address 10.0.26.1/24 user@R2# set lo0 unit 20 family inet address 10.0.0.20/32
在BGP R2 OSPF上配置路由接口和接口。
[edit protocols] user@R2# set bgp group rr type internal user@R2# set bgp group rr local-address 10.0.0.20 user@R2# set bgp group e1 type external user@R2# set bgp group e1 neighbor 10.0.26.2 peer-as 2 user@R2# set ospf area 0.0.0.0 interface lo0.20 passive user@R2# set ospf area 0.0.0.0 interface fe-1/2/0.21 user@R2# set ospf area 0.0.0.0 interface fe-1/2/1.28
对于从路由器 R2 发送至路由器 R1 的路由，将路由器 R2 播发为下一跳跃，因为路由器 R1 在 10.0.26.0/24 网络上没有路由器 R6 地址的路由。
[edit] user@R2# set policy-options policy-statement set_nh_self then next-hop self user@R2# set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self
配置自治系统编号。
[edit] user@R2# set routing-options autonomous-system 1
如果您完成了设备配置，请提交配置。
user@R2# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R2# show interfaces
fe-1/2/0 {
unit 21 {
family inet {
address 10.0.12.2/24;
}
}
}
fe-1/2/1 {
unit 26 {
family inet {
address 10.0.26.1/24;
}
}
}
lo0 {
unit 20 {
family inet {
address 10.0.0.20/32;
}
}
}
user@R2# show protocols
bgp {
group rr {
type internal;
local-address 10.0.0.20;
neighbor 10.0.0.10 {
export set_nh_self;
}
}
group e1 {
type external;
neighbor 10.0.26.2 {
peer-as 2;
}
}
}
ospf {
area 0.0.0.0 {
interface lo0.20 {
passive;
}
interface fe-1/2/0.21;
interface fe-1/2/1.28;
}
}
user@R2# show policy-options
policy-statement set_nh_self {
then {
next-hop self;
}
}
user@R2# show routing-options autonomous-system 1;
配置路由器 R3
分步过程
要配置路由器 R3：
将回传（lo0）接口和接口配置为路由器 R7 和路由器 R1。
[edit interfaces] user@R3# set fe-1/0/1 unit 31 family inet address 10.0.13.2/24 user@R3# set fe-1/0/2 unit 37 family inet address 10.0.37.1/24 user@R3# set lo0 unit 30 family inet address 10.0.0.30/32
在BGP R3 OSPF上配置数据包转发和路由。
[edit protocols] user@R3# set bgp group rr type internal user@R3# set bgp group rr local-address 10.0.0.30 user@R3# set bgp group e1 type external user@R3# set bgp group e1 neighbor 10.0.37.2 peer-as 2 user@R3# set ospf area 0.0.0.0 interface lo0.30 passive user@R3# set ospf area 0.0.0.0 interface fe-1/0/1.31 user@R3# set ospf area 0.0.0.0 interface fe-1/0/2.37
对于从路由器 R3 发送至路由器 R1 的路由，将路由器 R3 播发为下一跳跃，因为路由器 R1 在 10.0.37.0/24 网络上没有路由器 R7 地址的路由。
[edit] user@R3# set policy-options policy-statement set_nh_self then next-hop self user@R3# set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self
配置自治系统编号。
[edit] user@R3# set routing-options autonomous-system 1
如果您完成了设备配置，请提交配置。
user@R3# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R3# show interfaces
fe-1/0/1 {
unit 31 {
family inet {
address 10.0.13.2/24;
}
}
}
fe-1/0/2 {
unit 37 {
family inet {
address 10.0.37.1/24;
}
}
}
lo0 {
unit 30 {
family inet {
address 10.0.0.30/32;
}
}
}
user@R3# show protocols
bgp {
group rr {
type internal;
local-address 10.0.0.30;
neighbor 10.0.0.10 {
export set_nh_self;
}
}
group e1 {
type external;
neighbor 10.0.37.2 {
peer-as 2;
}
}
}
ospf {
area 0.0.0.0 {
interface lo0.30 {
passive;
}
interface fe-1/0/1.31;
interface fe-1/0/2.37;
}
}
user@R3# show policy-options
policy-statement set_nh_self {
then {
next-hop self;
}
}
user@R3# show routing-options autonomous-system 1;
配置路由器 R 4
分步过程
要配置路由器 R 4：
将接口配置为路由器 R1 和路由器 R8，并配置回传（lo0）接口。
[edit interfaces] user@R4# set fe-1/2/0 unit 41 family inet address 10.0.14.2/24 user@R4# set fe-1/2/1 unit 48 family inet address 10.0.48.1/24 user@R4# set lo0 unit 40 family inet address 10.0.0.40/32
在接口上配置 BGP，并配置 IBGP 路由反射。
[edit protocols bgp] user@R4# set group rr type internal user@R4# set group rr local-address 10.0.0.40 user@R4# set group rr neighbor 10.0.0.10 user@R4# set group rr_client type internal user@R4# set group rr_client local-address 10.0.0.40 user@R4# set group rr_client cluster 10.0.0.40
将路由器 R 4 配置为向其相邻节点、路由器 R8 发送最多六条路径。
路径的目标可以是路由器 R 4 可通过多个路径到达的任何目标。
[edit protocols bgp] user@R4# set group rr_client neighbor 10.0.0.80 family inet unicast add-path send path-count 6
将路由器 R 4 配置为从其邻接方、路由器 R1 接收多个路径。
路径的目标可以是路由器 R1 可通过多个路径到达的任何目标。
[edit protocols bgp group rr family inet unicast] user@R4# set add-path receive
在接口上配置 OSPF。
[edit protocols ospf area 0.0.0.0] user@R4# set interface fe-1/2/0.41 user@R4# set interface lo0.40 passive user@R4# set interface fe-1/2/1.48
配置允许路由器 R 4 将路由器 R8 的多条路径发送至 172.16.199.1/32 路由的策略。
路由器 R 4 接收 172.16.198.1/32 路由和 172.16.199.1/32 路由的多个路径。但是，由于此策略的原因，路由器 R 4 仅为 172.16.199.1/32 路由发送多个路径。
[edit protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast] user@R4# set add-path send prefix-policy allow_199 [edit policy-options policy-statement allow_199] user@R4# set from route-filter 172.16.199.1/32 exact user@R4# set then accept
路由器 R 4 也可配置为为添加路径的一部分附加广告前缀发送最多 20 BGP
add-path路由。[edit policy-options policy-statement allow_199] user@R4# set term match_199 from prefix-list match_199 user@R4# set then add-path send-count 20
配置自治系统编号。
[edit routing-options] user@R4# set autonomous-system 1
如果您完成了设备配置，请提交配置。
user@R4# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R4# show interfaces
fe-1/2/0 {
unit 41 {
family inet {
address 10.0.14.2/24;
}
}
}
fe-1/2/1 {
unit 48 {
family inet {
address 10.0.48.1/24;
}
}
}
lo0 {
unit 40 {
family inet {
address 10.0.0.40/32;
}
}
}
user@R4# show protocols
bgp {
group rr {
type internal;
local-address 10.0.0.40;
family inet {
unicast {
add-path {
receive;
}
}
}
neighbor 10.0.0.10;
}
group rr_client {
type internal;
local-address 10.0.0.40;
cluster 10.0.0.40;
neighbor 10.0.0.80 {
family inet {
unicast {
add-path {
send {
path-count 6;
prefix-policy allow_199;
}
}
}
}
}
}
}
ospf {
area 0.0.0.0 {
interface lo0.40 {
passive;
}
interface fe-1/2/0.41;
interface fe-1/2/1.48;
}
}
user@R4# show policy-options
policy-statement allow_199 {
from {
route-filter 172.16.199.1/32 exact;
}
from term match_199 {
prefix-list match_199;
}
then add-path send-count 20;
then accept;
}
user@R4# show routing-options autonomous-system 1;
配置路由器 R5
分步过程
要配置路由器 R5：
将回传（lo0）接口和接口配置为路由器 R1。
[edit interfaces] user@R5# set fe-1/2/0 unit 51 family inet address 10.0.15.2/24 user@R5# set lo0 unit 50 family inet address 10.0.0.50/32
在BGP R5 接口上配置路由接口。
[edit protocols bgp group e1] user@R5# set type external user@R5# set neighbor 10.0.15.1 peer-as 1
创建用于再分配至 BGP 的静态路由。
[edit routing-options] user@R5# set static route 172.16.199.1/32 reject user@R5# set static route 172.16.198.1/32 reject
将静态和直接路由重新分发至 BGP。
[edit protocols bgp group e1 neighbor 10.0.15.1] user@R5# set export s2b [edit policy-options policy-statement s2b] user@R5# set from protocol static user@R5# set from protocol direct user@R5# set then as-path-expand 2 user@R5# set then accept
配置自治系统编号。
[edit routing-options] user@R5# set autonomous-system 2
如果您完成了设备配置，请提交配置。
user@R5# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R5# show interfaces
fe-1/2/0 {
unit 51 {
family inet {
address 10.0.15.2/24;
}
}
}
lo0 {
unit 50 {
family inet {
address 10.0.0.50/32;
}
}
}
user@R5# show protocols
bgp {
group e1 {
type external;
neighbor 10.0.15.1 {
export s2b;
peer-as 1;
}
}
}
user@R5# show policy-options
policy-statement s2b {
from protocol [ static direct ];
then {
as-path-expand 2;
accept;
}
}
user@R5# show routing-options
static {
route 172.16.198.1/32 reject;
route 172.16.199.1/32 reject;
}
autonomous-system 2;
配置路由器 R6
分步过程
要配置路由器 R6：
将回传（lo0）接口和接口配置为路由器 R2。
[edit interfaces] user@R6# set fe-1/2/0 unit 62 family inet address 10.0.26.2/24 user@R6# set lo0 unit 60 family inet address 10.0.0.60/32
在BGP R6 接口上配置路由接口。
[edit protocols] user@R6# set bgp group e1 type external user@R6# set bgp group e1 neighbor 10.0.26.1 peer-as 1
创建用于再分配至 BGP 的静态路由。
[edit] user@R6# set routing-options static route 172.16.199.1/32 reject user@R6# set routing-options static route 172.16.198.1/32 reject
从路由器 R6 的路由表中重新分配静态和直接路由，BGP。
[edit protocols bgp group e1 neighbor 10.0.26.1] user@R6# set export s2b [edit policy-options policy-statement s2b] user@R6# set from protocol static user@R6# set from protocol direct user@R6# set then accept
配置自治系统编号。
[edit routing-options] user@R6# set autonomous-system 2
如果您完成了设备配置，请提交配置。
user@R6# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R6# show interfaces
fe-1/2/0 {
unit 62 {
family inet {
address 10.0.26.2/24;
}
}
}
lo0 {
unit 60 {
family inet {
address 10.0.0.60/32;
}
}
}
user@R6# show protocols
bgp {
group e1 {
type external;
neighbor 10.0.26.1 {
export s2b;
peer-as 1;
}
}
}
user@R6# show policy-options
policy-statement s2b {
from protocol [ static direct ];
then accept;
}
user@R6# show routing-options
static {
route 172.16.198.1/32 reject;
route 172.16.199.1/32 reject;
}
autonomous-system 2;
配置路由器 R7
分步过程
要配置路由器 R7：
将回传（lo0）接口和接口配置为路由器 R3。
[edit interfaces] user@R7# set fe-1/2/0 unit 73 family inet address 10.0.37.2/24 user@R7# set lo0 unit 70 family inet address 10.0.0.70/32
在BGP R7 接口上配置路由接口。
[edit protocols bgp group e1] user@R7# set type external user@R7# set neighbor 10.0.37.1 peer-as 1
创建用于再分配至 BGP 的静态路由。
[edit] user@R7# set routing-options static route 172.16.199.1/32 reject
从路由器 R7 的路由表中重新分配静态和直接路由，BGP。
[edit protocols bgp group e1 neighbor 10.0.37.1] user@R7# set export s2b [edit policy-options policy-statement s2b] user@R7# set from protocol static user@R7# set from protocol direct user@R7# set then accept
配置自治系统编号。
[edit routing-options] user@R7# set autonomous-system 2
如果您完成了设备配置，请提交配置。
user@R7# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R7# show interfaces
fe-1/2/0 {
unit 73 {
family inet {
address 10.0.37.2/24;
}
}
}
lo0 {
unit 70 {
family inet {
address 10.0.0.70/32;
}
}
}
user@R7# show protocols
bgp {
group e1 {
type external;
neighbor 10.0.37.1 {
export s2b;
peer-as 1;
}
}
}
user@R7# show policy-options
policy-statement s2b {
from protocol [ static direct ];
then accept;
}
user@R7# show routing-options
static {
route 172.16.199.1/32 reject;
}
autonomous-system 2;
配置路由器 R8
分步过程
要配置路由器 R8：
将回传（lo0）接口和接口配置为路由器 R 4。
[edit interfaces] user@R8# set fe-1/2/0 unit 84 family inet address 10.0.48.2/24 user@R8# set lo0 unit 80 family inet address 10.0.0.80/32
在BGP R8 OSPF上配置路由接口和接口。
[edit protocols] user@R8# set bgp group rr type internal user@R8# set bgp group rr local-address 10.0.0.80 user@R8# set ospf area 0.0.0.0 interface lo0.80 passive user@R8# set ospf area 0.0.0.0 interface fe-1/2/0.84
将路由器 R8 配置为从其邻接方、路由器 R 4 中接收多个路径。
路径的目标可以是路由器 R 4 可通过多个路径到达的任何目标。
[edit protocols] user@R8# set bgp group rr neighbor 10.0.0.40 family inet unicast add-path receive
配置自治系统编号。
[edit] user@R8# set routing-options autonomous-system 1
如果您完成了设备配置，请提交配置。
user@R8# commit
成果
从配置模式， show interfaces输入、 show protocolsshow policy-options、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@R8# show interfaces
fe-1/2/0 {
unit 84 {
family inet {
address 10.0.48.2/24;
}
}
}
lo0 {
unit 80 {
family inet {
address 10.0.0.80/32;
}
}
}
user@R8# show protocols
bgp {
group rr {
type internal;
local-address 10.0.0.80;
neighbor 10.0.0.40 {
family inet {
unicast {
add-path {
receive;
}
}
}
}
}
}
ospf {
area 0.0.0.0 {
interface lo0.80 {
passive;
}
interface fe-1/2/0.84;
}
}
user@R8# show routing-options autonomous-system 1;
针对
确认配置是否正常工作。
验证 BGP 对等方是否能够发送和接收多条路径
用途
请确保以下一个或两个字符串显示在show bgp neighbor命令输出中：
NLRI's for which peer can receive multiple paths: inet-unicastNLRI's for which peer can send multiple paths: inet-unicast
行动
user@R1> show bgp neighbor 10.0.0.40 Peer: 10.0.0.40+179 AS 1 Local: 10.0.0.10+64227 AS 1 Type: Internal State: Established Flags: <Sync> ... NLRI's for which peer can receive multiple paths: inet-unicast ...
user@R4> show bgp neighbor 10.0.0.10 Peer: 10.0.0.10+64227 AS 1 Local: 10.0.0.40+179 AS 1 Type: Internal State: Established Flags: <Sync> ... NLRI's for which peer can send multiple paths: inet-unicast ...
user@R4> show bgp neighbor 10.0.0.80 Peer: 10.0.0.80+55416 AS 1 Local: 10.0.0.40+179 AS 1 Type: Internal State: Established (route reflector client)Flags: <Sync> ,,, NLRI's for which peer can receive multiple paths: inet-unicast ...
user@R8> show bgp neighbor 10.0.0.40 Peer: 10.0.0.40+179 AS 1 Local: 10.0.0.80+55416 AS 1 Type: Internal State: Established Flags: <Sync> ... NLRI's for which peer can send multiple paths: inet-unicast ...
验证路由器 R1 是否公布多个路径
用途
确保将 172.16.198.1/32 目标的多条路径和 172.16.199.1/32 目标的多条路径公布到路由器 R 4。
行动
user@R1> show route advertising-protocol bgp 10.0.0.40
inet.0: 21 destinations, 25 routes (21 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 10.0.0.50/32 10.0.15.2 100 2 2 I
* 10.0.0.60/32 10.0.0.20 100 2 I
* 10.0.0.70/32 10.0.0.30 100 2 I
* 172.16.198.1/32 10.0.0.20 100 2 I
10.0.15.2 100 2 2 I
* 172.16.199.1/32 10.0.0.20 100 2 I
10.0.0.30 100 2 I
10.0.15.2 100 2 2 I
* 172.16.200.0/30 10.0.0.20 100 2 I
含义
当您看到一个前缀和多个下一跃点时，表示多条路径通告到路由器 R 4。
验证路由器 R 4 是否正在接收和公布多条路径
用途
请确保从路由器 R1 接收到 172.16.199.1/32 目标的多个路径，并通告至路由器 R8。请确保从路由器 R1 接收到 172.16.198.1/32 目标的多个路径，但只有一个指向此目标的路径通告给路由器 R8。
行动
user@R4> show route receive-protocol bgp 10.0.0.10
inet.0: 19 destinations, 22 routes (19 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 10.0.0.50/32 10.0.15.2 100 2 2 I
* 10.0.0.60/32 10.0.0.20 100 2 I
* 10.0.0.70/32 10.0.0.30 100 2 I
* 172.16.198.1/32 10.0.0.20 100 2 I
10.0.15.2 100 2 2 I
* 172.16.199.1/32 10.0.0.20 100 2 I
10.0.0.30 100 2 I
10.0.15.2 100 2 2 I
* 172.16.200.0/30 10.0.0.20 100 2 I
user@R4> show route advertising-protocol bgp 10.0.0.80
inet.0: 19 destinations, 22 routes (19 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 10.0.0.50/32 10.0.15.2 100 2 2 I
* 10.0.0.60/32 10.0.0.20 100 2 I
* 10.0.0.70/32 10.0.0.30 100 2 I
* 172.16.198.1/32 10.0.0.20 100 2 I
* 172.16.199.1/32 10.0.0.20 100 2 I
10.0.0.30 100 2 I
10.0.15.2 100 2 2 I
* 172.16.200.0/30 10.0.0.20 100 2 I
含义
此show route receive-protocol命令显示路由器 r 4 收到 172.16.198.1/32 目标的两条路径和 172.16.199.1/32 目标的三条路径。此show route advertising-protocol命令显示路由器 r 4 仅通告 172.16.198.1/32 目标的一条路径，并将所有三个路径公布到 172.16.199.1/32 目标。
由于应用于路由器 R 4 的前缀策略，路由器 R 4 不会向 172.16.198.1/32 目标通告多个路径。路由器 R 4 仅公布指向 172.16.198.1/32 目标的一个路径，即使它接收到达此目标的多条路径也是如此。
验证路由器 R8 是否正在接收多个路径
用途
确保路由器 R8 通过路由器 R 4 接收到 172.16.199.1/32 目标的多个路径。确保路由器 R8 仅接收到 172.16.198.1/32 目的地的一条路径到路由器 R 4。
行动
user@R8> show route receive-protocol bgp 10.0.0.40
inet.0: 18 destinations, 20 routes (18 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 10.0.0.50/32 10.0.15.2 100 2 2 I
* 10.0.0.60/32 10.0.0.20 100 2 I
* 10.0.0.70/32 10.0.0.30 100 2 I
* 172.16.198.1/32 10.0.0.20 100 2 I
* 172.16.199.1/32 10.0.0.20 100 2 I
10.0.0.30 100 2 I
10.0.15.2 100 2 2 I
* 200.1.1.0/30 10.0.0.20 100 2 I
检查路径 ID
用途
在下游设备上，路由器 R 4 和路由器 R8，验证路径 ID 是否唯一标识路径。查找Addpath Path ID:字符串。
行动
user@R4> show route 172.16.199.1/32 detail
inet.0: 18 destinations, 20 routes (18 active, 0 holddown, 0 hidden)
172.16.199.1/32 (3 entries, 3 announced)
*BGP Preference: 170/-101
Next hop type: Indirect
Next-hop reference count: 9
Source: 10.0.0.10
Next hop type: Router, Next hop index: 676
Next hop: 10.0.14.1 via lt-1/2/0.41, selected
Protocol next hop: 10.0.0.20
Indirect next hop: 92041c8 262146
State: <Active Int Ext>
Local AS: 1 Peer AS: 1
Age: 1:44:37 Metric2: 2
Task: BGP_1.10.0.0.10+64227
Announcement bits (3): 2-KRT 3-BGP RT Background 4-Resolve tree 1
AS path: 2 I (Originator) Cluster list: 10.0.0.10
AS path: Originator ID: 10.0.0.20
Accepted
Localpref: 100
Router ID: 10.0.0.10
Addpath Path ID: 1
BGP Preference: 170/-101
Next hop type: Indirect
Next-hop reference count: 4
Source: 10.0.0.10
Next hop type: Router, Next hop index: 676
Next hop: 10.0.14.1 via lt-1/2/0.41, selected
Protocol next hop: 10.0.0.30
Indirect next hop: 92042ac 262151
State: <NotBest Int Ext>
Inactive reason: Not Best in its group - Router ID
Local AS: 1 Peer AS: 1
Age: 1:44:37 Metric2: 2
Task: BGP_1.10.0.0.10+64227
Announcement bits (1): 3-BGP RT Background
AS path: 2 I (Originator) Cluster list: 10.0.0.10
AS path: Originator ID: 10.0.0.30
Accepted
Localpref: 100
Router ID: 10.0.0.10
Addpath Path ID: 2
BGP Preference: 170/-101
Next hop type: Indirect
Next-hop reference count: 4
Source: 10.0.0.10
Next hop type: Router, Next hop index: 676
Next hop: 10.0.14.1 via lt-1/2/0.41, selected
Protocol next hop: 10.0.15.2
Indirect next hop: 92040e4 262150
State: <Int Ext>
Inactive reason: AS path
Local AS: 1 Peer AS: 1
Age: 1:44:37 Metric2: 2
Task: BGP_1.10.0.0.10+64227
Announcement bits (1): 3-BGP RT Background
AS path: 2 2 I
Accepted
Localpref: 100
Router ID: 10.0.0.10
Addpath Path ID: 3user@R8> show route 172.16.199.1/32 detail
inet.0: 17 destinations, 19 routes (17 active, 0 holddown, 0 hidden)
172.16.199.1/32 (3 entries, 1 announced)
*BGP Preference: 170/-101
Next hop type: Indirect
Next-hop reference count: 9
Source: 10.0.0.40
Next hop type: Router, Next hop index: 1045
Next hop: 10.0.48.1 via lt-1/2/0.84, selected
Protocol next hop: 10.0.0.20
Indirect next hop: 91fc0e4 262148
State: <Active Int Ext>
Local AS: 1 Peer AS: 1
Age: 1:56:51 Metric2: 3
Task: BGP_1.10.0.0.40+179
Announcement bits (2): 2-KRT 4-Resolve tree 1
AS path: 2 I (Originator) Cluster list: 10.0.0.40 10.0.0.10
AS path: Originator ID: 10.0.0.20
Accepted
Localpref: 100
Router ID: 10.0.0.40
Addpath Path ID: 1
BGP Preference: 170/-101
Next hop type: Indirect
Next-hop reference count: 4
Source: 10.0.0.40
Next hop type: Router, Next hop index: 1045
Next hop: 10.0.48.1 via lt-1/2/0.84, selected
Protocol next hop: 10.0.0.30
Indirect next hop: 91fc1c8 262152
State: <NotBest Int Ext>
Inactive reason: Not Best in its group - Router ID
Local AS: 1 Peer AS: 1
Age: 1:56:51 Metric2: 3
Task: BGP_1.10.0.0.40+179
AS path: 2 I (Originator) Cluster list: 10.0.0.40 10.0.0.10
AS path: Originator ID: 10.0.0.30
Accepted
Localpref: 100
Router ID: 10.0.0.40
Addpath Path ID: 2
BGP Preference: 170/-101
Next hop type: Indirect
Next-hop reference count: 4
Source: 10.0.0.40
Next hop type: Router, Next hop index: 1045
Next hop: 10.0.48.1 via lt-1/2/0.84, selected
Protocol next hop: 10.0.15.2
Indirect next hop: 91fc2ac 262153
State: <Int Ext>
Inactive reason: AS path
Local AS: 1 Peer AS: 1
Age: 1:56:51 Metric2: 3
Task: BGP_1.10.0.0.40+179
AS path: 2 2 I (Originator) Cluster list: 10.0.0.40
AS path: Originator ID: 10.0.0.10
Accepted
Localpref: 100
Router ID: 10.0.0.40
Addpath Path ID: 3示例：配置用于负载平衡的 BGP 多条路径的选择性广告
此示例说明如何配置 BGP 多条路径的选择性广告。广告所有可用的多路径可能会导致处理设备内存的开销大，也会考虑扩展。您可以将 BGP 路由反射器配置为仅通告贡献者 multipaths 以实现负载平衡。
要求
配置此示例之前，不需要在设备初始化之外进行特殊配置。
此示例使用以下硬件和软件组件：
八个路由器，可以是 M Series、MX 系列或 T Series 路由器的组合
设备上的 Junos OS Release 16.1 r 或更高版本
概述
从 Junos OS Release 16.1 r 开始，您可以将 BGP add-path限制为仅供广告贡献者使用多个路径。您可以限制和配置 BGP multipath算法选择的六个前缀。对多条路径进行选择性广告有助于 Internet 服务提供商和数据中心使用路由反射器在 IBGP 中构建路径内多样性。您可以启用 BGP 路由反射器来通告作为负载平衡的参与者路径。
拓扑
在 图 7 中，RR1 和 RR4 是路由反射器。路由器 R2 和 R3 是路由反射器 RR1 的客户端。路由器 R8 是路由反射器 RR4 的客户端。为多路径配置带邻设备 R2 和 R3 的 RR1 组。路由器 R5、R6 和路由器 R7 将静态路由 199.1.1.1/32 和 198.1.1.1/32 重新分配给BGP。
在路由器 RR1 中配置负载平衡策略，以计算 199.1.1.1/32 路由的多路径。多路径功能配置在邻接 RR4 的 add-path 下。但是，路由器 RR4 未配置负载平衡多路径。路由器 RR1 配置为从多路径候选路由中选择最多 6 个添加路径路由至 199.1.1.1/32 发送路由器 RR4。
图 7： 示例：配置用于负载平衡的 BGP 多条路径的选择性广告
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后进入从配置模式提交。
路由器 RR1
set interfaces ge-1/0/10 unit 0 description RR1->R2 set interfaces ge-1/0/10 unit 0 family inet address 10.0.12.1/24 set interfaces ge-1/0/11 unit 0 description RR1->RR4 set interfaces ge-1/0/11 unit 0 family inet address 10.0.14.1/24 set interfaces ge-1/0/12 unit 0 description RR1->R5 set interfaces ge-1/0/12 unit 0 family inet address 10.0.15.1/24 set interfaces ge-1/0/13 unit 0 description RR1->R3 set interfaces ge-1/0/13 unit 0 family inet address 10.0.13.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.10/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.10 set protocols bgp group rr cluster 10.0.0.10 set protocols bgp group rr multipath set protocols bgp group rr neighbor 10.0.0.20 set protocols bgp group rr neighbor 10.0.0.30 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.15.2 local-address 10.0.15.1 set protocols bgp group e1 neighbor 10.0.15.2 peer-as 64502 set protocols bgp group rr_rr type internal set protocols bgp group rr_rr local-address 10.0.0.10 set protocols bgp group rr_rr neighbor 10.0.0.40 family inet unicast add-path send path-count 6 set protocols bgp group rr_rr neighbor 10.0.0.40 family inet unicast add-path send multipath set protocols ospf area 0.0.0.0 interface lo0.10 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface ge-1/0/13 set protocols ospf area 0.0.0.0 interface ge-1/0/11 set protocols ospf area 0.0.0.0 interface ge-1/0/12 set policy-options prefix-list match_199 199.1.1.1/32 set policy-options policy-statement loadbal_199 term match_100 from prefix-list match_199 set policy-options policy-statement loadbal_199 from route-filter 199.1.1.1/32 exact set policy-options policy-statement loadbal_199 then load-balance per-packet set routing-options router-id 10.0.0.10 set routing-options autonomous-system 64501 set routing-options forwarding-table export loadbal_199
路由器 R2
set interfaces ge-1/0/10 unit 0 description R2->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.12.2/24 set interfaces ge-1/0/11 unit 0 description R2->R6 set interfaces ge-1/0/11 unit 0 family inet address 10.0.26.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.20/32 set protocols bgp group rr local-address 10.0.0.20 set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.26.2 peer-as 64502 set protocols ospf area 0.0.0.0 interface lo0.20 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface ge-1/0/11 set policy-options policy-statement set_nh_self then next-hop self set routing-options autonomous-system 64501
路由器 R3
set interfaces ge-1/0/10 unit 0 description R3->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.13.2/24 set interfaces ge-1/0/11 unit 0 description R3->R7 set interfaces ge-1/0/11 unit 0 family inet address 10.0.37.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.30/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.30 set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.37.2 peer-as 64502 set protocols ospf area 0.0.0.0 interface lo0.30 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface ge-1/0/13 set policy-options policy-statement set_nh_self then next-hop self set routing-options autonomous-system 64501
路由器 RR4
set interfaces ge-1/0/10 unit 0 description RR4->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.14.2/24 set interfaces ge-1/0/11 unit 0 description RR4->R8 set interfaces ge-1/0/11 unit 0 family inet address 10.0.48.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.40/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.40 set protocols bgp group rr family inet unicast add-path receive set protocols bgp group rr neighbor 10.0.0.10 set protocols bgp group rr_client type internal set protocols bgp group rr_client local-address 10.0.0.40 set protocols bgp group rr_client cluster 10.0.0.40 set protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send prefix-policy addpath-communities-send-4713-100 set protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send path-count 2 set protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send multipath set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface lo0.40 passive set protocols ospf area 0.0.0.0 interface ge-1/0/11 set policy-options prefix-list match_199 199.1.1.1/32 set routing-options autonomous-system 64501
路由器 R5
set interfaces ge-1/0/10 unit 0 description R5->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.15.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.50/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.15.1 export s2b set protocols bgp group e1 neighbor 10.0.15.1 peer-as 64501 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then community add addpath-community set policy-options policy-statement s2b then as-path-expand 2 set policy-options policy-statement s2b then accept set policy-options community addpath-community members 4713:100 set routing-options static route 199.1.1.1/32 reject set routing-options static route 198.1.1.1/32 reject set routing-options autonomous-system 64502
路由器 R6
set interfaces ge-1/0/10 unit 0 description R6->R2 set interfaces ge-1/0/10 unit 0 family inet address 10.0.26.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.60/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.26.1 export s2b set protocols bgp group e1 neighbor 10.0.26.1 peer-as 64501 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then community add addpath-community set policy-options policy-statement s2b then accept set policy-options community addpath-community members 4713:100 set routing-options static route 199.1.1.1/32 reject set routing-options static route 198.1.1.1/32 reject set routing-options autonomous-system 64502
路由器 R7
set interfaces ge-1/0/10 unit 0 description R7->R3 set interfaces ge-1/0/10 unit 0 family inet address 10.0.37.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.70/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.37.1 export s2b set protocols bgp group e1 neighbor 10.0.37.1 peer-as 64501 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then community add addpath-community set policy-options policy-statement s2b then accept set policy-options community addpath-community members 4713:100 set routing-options static route 199.1.1.1/32 reject set routing-options autonomous-system 64502
路由器 R8
set interfaces ge-1/0/10 unit 0 description R8->RR4 set interfaces ge-1/0/10 unit 0 family inet address 10.0.48.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.80/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.80 set protocols bgp group rr neighbor 10.0.0.40 family inet unicast add-path receive set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10.8 set routing-options autonomous-system 64501 set chassis fpc 1 pic 0 tunnel-services bandwidth 1g
配置路由器 RR1
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航 CLI 的信息，请参阅Cli 用户指南中的使用配置模式中的 CLI 编辑器。
要配置路由器 RR1：
注：
修改相应接口名称、地址和其他参数之后，对其他路由器重复此过程。
使用 IPv4 地址配置接口。
[edit interfaces] user@RR1# set ge-1/0/10 unit 0 description RR1->R2 user@RR1# set ge-1/0/10 unit 0 family inet address 10.0.12.1/24 user@RR1# set ge-1/0/11 unit 0 description RR1->RR4 user@RR1# set ge-1/0/11 unit 0 family inet address 10.0.14.1/24 user@RR1# set ge-1/0/12 unit 0 description RR1->R5 user@RR1# set ge-1/0/12 unit 0 family inet address 10.0.15.1/24 user@RR1# set ge-1/0/13 unit 0 description RR1->R3 user@RR1# set ge-1/0/13 unit 0 family inet address 10.0.13.1/24
配置环回地址。
[edit interfaces] user@RR1# set lo0 unit 0 family inet address 10.0.0.10/32
配置内部网关协议（IGP），例如 OSPF 或 IS-IS。
[edit protocols] user@RR1# set ospf area 0.0.0.0 interface lo0.10 passive user@RR1# set ospf area 0.0.0.0 interface ge-1/0/10 user@RR1# set ospf area 0.0.0.0 interface ge-1/0/13 user@RR1# set ospf area 0.0.0.0 interface ge-1/0/11 user@RR1# set ospf area 0.0.0.0 interface ge-1/0/12
为连接到内部路由器 R2 和 R3 的接口配置内部组 rr。
[edit protocols] user@RR1# set bgp group rr type internal user@RR1# set bgp group rr local-address 10.0.0.10 user@RR1# set bgp group rr cluster 10.0.0.10 user@RR1# set bgp group rr neighbor 10.0.0.20 user@RR1# set bgp group rr neighbor 10.0.0.30
为内部 BGP 组 rr 配置负载平衡。
[edit protocols] user@RR1# set bgp group rr multipath
配置路由rr_rr的内部组路由。
[edit protocols] user@RR1# set bgp group rr_rr type internal user@RR1# set bgp group rr_rr local-address 10.0.0.10
将 addpath 多路径功能配置为仅通告贡献者多条路径，并将公布的 multipaths 数量限制为6。
[edit protocols] user@RR1# set bgp group rr_rr neighbor 10.0.0.40 family inet unicast add-path send multipath user@RR1# set bgp group rr_rr neighbor 10.0.0.40 family inet unicast add-path send path-count 6
在连接到外部边缘路由器的接口上配置 EBGP。
[edit protocols] user@RR1# set bgp group e1 type external user@RR1# set bgp group e1 neighbor 10.0.15.2 local-address 10.0.15.1 user@RR1# set bgp group e1 neighbor 10.0.15.2 peer-as 64502
为每个数据包负载平衡定义策略 loadbal_199。
[edit policy-options] user@RR1# set prefix-list match_199 199.1.1.1/32 user@RR1# set policy-statement loadbal_199 term match_100 from prefix-list match_199 user@RR1# set policy-statement loadbal_199 from route-filter 199.1.1.1/32 exact user@RR1# set policy-statement loadbal_199 then load-balance per-packet
应用定义的导出策略 loadbal_199。
[edit routing-options] user@RR1# set forwarding-table export loadbal_199
为 BGP 主机配置路由器 ID 和自治系统。
[edit routing-options] user@RR1# set router-id 10.0.0.10 user@RR1# set autonomous-system 64501
成果
从配置模式， show interfaces输入、 show protocolsshow routing-options、和show policy-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
[edit]
user@RR1# show interfaces
ge-1/0/10 {
unit 0 {
description RR1->R2;
family inet {
address 10.0.12.1/24;
}
}
}
ge-1/0/11 {
unit 0 {
description RR1->RR4;
family inet {
address 10.0.14.1/24;
}
}
}
ge-1/0/12 {
unit 0 {
description RR1->R5;
family inet {
address 10.0.15.1/24;
}
}
}
ge-1/0/13 {
unit 0 {
description RR1->R3;
family inet {
address 10.0.13.1/24;
}
}
}
lo0 {
unit 0 {
family inet {
address 10.0.0.10/32;
}
}
}
[edit]
user@RR1# show protocols
bgp {
group rr {
type internal;
local-address 10.0.0.10;
cluster 10.0.0.10;
multipath;
neighbor 10.0.0.20;
neighbor 10.0.0.30;
}
group e1 {
type external;
neighbor 10.0.15.2 {
local-address 10.0.15.1;
peer-as 64502;
}
}
group rr_rr {
type internal;
local-address 10.0.0.10;
neighbor 10.0.0.40 {
family inet {
unicast {
add-path {
send {
path-count 6;
multipath;
}
}
}
}
}
}
}
ospf {
area 0.0.0.0 {
interface all;
interface fxp0.0 {
disable;
}
interface lo0.10 {
passive;
}
interface ge-1/0/10;
interface ge-1/0/13;
interface ge-1/0/11;
interface ge-1/0/12;
}
}
[edit]
user@RR1# show routing-options
router-id 10.0.0.10;
autonomous-system 64501;
forwarding-table {
export load-bal_199;
}
[edit]
user@RR1# show policy-options
prefix-list match_199 {
199.1.1.1/32;
}
policy-statement loadbal_199 {
term match_100 {
from {
prefix-list match_199;
}
}
from {
route-filter 199.1.1.1/32 exact;
}
then {
load-balance per-packet;
}
}
如果您完成了设备配置，请提交配置。
user@RR1# commit
针对
确认配置是否正常工作。
验证静态路由的多路径路由 199.1.1.1/32
用途
验证目标 199.1.1.1/32 的可用多路径路由。
行动
在操作模式下，在路由器 show route 199.1.1.1/32 detail RR1 上运行 命令。
user@RR1> show route 199.1.1.1/32 detail
inet.0: 22 destinations, 26 routes (22 active, 0 holddown, 0 hidden)
199.1.1.1/32 (3 entries, 2 announced)
*BGP Preference: 170/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xae5cc90
Next-hop reference count: 1
Source: 10.0.0.20
Next hop type: Router, Next hop index: 1118
Next hop: 10.0.12.2 via lt-1/0/10.1, selected
Session Id: 0x0
Next hop type: Router, Next hop index: 1115
Next hop: 10.0.13.2 via lt-1/0/10.9
Session Id: 0x0
Protocol next hop: 10.0.0.20
Indirect next hop: 0xc409410 1048574 INH Session ID: 0x0
Protocol next hop: 10.0.0.30
Indirect next hop: 0xc409520 1048575 INH Session ID: 0x0
State: <Active Int Ext>
Local AS: 1 Peer AS: 1
Age: 4:03:29 Metric2: 1
Validation State: unverified
Task: BGP_1.10.0.0.20
Announcement bits (3): 2-KRT 3-BGP_RT_Background 4-Resolve tree 2
AS path: 2 I
Communities: 4713:100
Accepted Multipath
Localpref: 100
Router ID: 10.0.0.20
BGP Preference: 170/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xae0ec10
Next-hop reference count: 4
Source: 10.0.0.30
Next hop type: Router, Next hop index: 1115
Next hop: 10.0.13.2 via lt-1/0/10.9, selected
Session Id: 0x0
Protocol next hop: 10.0.0.30
Indirect next hop: 0xc409520 1048575 INH Session ID: 0x0
State: <NotBest Int Ext>
Inactive reason: Not Best in its group - Router ID
Local AS: 64501 Peer AS: 64501
Age: 4:03:29 Metric2: 1
Validation State: unverified
Task: BGP_1.10.0.0.30
Announcement bits (1): 3-BGP_RT_Background
AS path: 2 I
Communities: 4713:100
Accepted MultipathContrib
Localpref: 100
Router ID: 10.0.0.30
BGP Preference: 170/-101
Next hop type: Router, Next hop index: 1105
Address: 0xae0e970
Next-hop reference count: 5
Source: 10.0.15.2
Next hop: 10.0.15.2 via lt-1/0/10.6, selected
Session Id: 0x0
State: <Ext>
Inactive reason: AS path
Local AS: 1 Peer AS: 2
Age: 4:05:01
Validation State: unverified
Task: BGP_2.10.0.15.2
AS path: 2 2 I
Communities: 4713:100
Accepted
Localpref: 100
Router ID: 10.0.0.50 含义
路由器 RR1 上已启用选择性广告多路径功能，且路由 199.1.1.1/32 会提供多个下一个hop。路由 199.1.1.1/32 的两个可用的下一跃点是10.0.0.20 和10.0.0.30。
验证多路径路由是否已从路由器 RR1 播发至路由器 RR4
用途
验证路由器 RR1 是否正在广告多路径路由。
行动
在操作模式下，在路由器 show route advertising-protocol bgp 10.0.0.40 RR1 上运行 命令。
user@RR1> show route advertising-protocol bgp 10.0.0.40
inet.0: 22 destinations, 26 routes (22 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 10.0.0.50/32 10.0.15.2 100 2 2 I
* 10.0.0.60/32 10.0.0.20 100 2 I
* 10.0.0.70/32 10.0.0.30 100 2 I
* 198.1.1.1/32 10.0.0.20 100 2 I
* 199.1.1.1/32 10.0.0.20 100 2 I
10.0.0.30 100 2 I
user@RR1> show route advertising-protocol bgp 10.0.0.40 detail
inet.0: 22 destinations, 26 routes (22 active, 0 holddown, 0 hidden)
* 10.0.0.50/32 (1 entry, 1 announced)
BGP group rr_rr type Internal
Nexthop: 10.0.15.2
Localpref: 100
AS path: [1] 2 2 I
Communities: 4713:100
Addpath Path ID: 1
….* 199.1.1.1/32 (3 entries, 2 announced)
BGP group rr_rr type Internal
Nexthop: 10.0.0.20
Localpref: 100
AS path: [1] 2 I
Communities: 4713:100
Cluster ID: 10.0.0.10
Originator ID: 10.0.0.20
Addpath Path ID: 1
BGP group rr_rr type Internal
Nexthop: 10.0.0.30
Localpref: 100
AS path: [1] 2 I
Communities: 4713:100
Cluster ID: 10.0.0.10
Originator ID: 10.0.0.30
Addpath Path ID: 2
含义
路由器 RR1 向路由器 RR4 发送两个下一跳跃 10.0.0.20 和 10.0.0.30。
验证路由器 RR4 是否已将 199.1.1.1/32 的一个路由播发至路由器 R8
用途
多路径未在路由器 RR4 上配置，因此路由 199.1.1.1/32 没有添加路径资格。验证路由器 RR4 是否仅将 199.1.1.1/32 的一个路由播发至路由器 R8。
行动
在操作模式下，在路由器 show route advertising-protocol bgp 10.0.0.80 RR4 上运行 命令。
user@RR4> show route advertising-protocol bgp 10.0.0.80 detail
inet.0: 20 destinations, 21 routes (20 active, 0 holddown, 0 hidden)
* 10.0.0.50/32 (1 entry, 1 announced)
BGP group rr_client type Internal
Nexthop: 10.0.15.2
Localpref: 100
AS path: [1] 2 2 I
Communities: 4713:100
Cluster ID: 10.0.0.40
Originator ID: 10.0.0.10
Addpath Path ID: 1
…
* 198.1.1.1/32 (1 entry, 1 announced)
BGP group rr_client type Internal
Nexthop: 10.0.0.20
Localpref: 100
AS path: [1] 2 I (Originator)
Cluster list: 10.0.0.10
Originator ID: 10.0.0.20
Communities: 4713:100
Cluster ID: 10.0.0.40
Addpath Path ID: 1
* 199.1.1.1/32 (2 entries, 1 announced)
BGP group rr_client type Internal
Nexthop: 10.0.0.20
Localpref: 100
AS path: [1] 2 I (Originator)
Cluster list: 10.0.0.10
Originator ID: 10.0.0.20
Communities: 4713:100
Cluster ID: 10.0.0.40
Addpath Path ID: 1
含义
由于路由器 RR4 上未启用多路径，因此向路由器 R8 播发路径 10.0.0.20。
示例：根据 BGP 社区价值配置路由策略以选择和公布 Multipaths
广告所有可用的多路径可能会导致在设备内存中处理的开销大。如果您希望公布有限的部分前缀，但又不实际知道这些前缀，则可以使用 BGP 社区值来识别需要通告到 BGP 邻居的前缀路由。此示例说明如何定义路由策略，以根据已知 BGP 社区值过滤和公布多个路径。
要求
配置此示例之前，不需要在设备初始化之外进行特殊配置。
此示例使用以下硬件和软件组件：
八个路由器，可以是 M Series、MX 系列或 T Series 路由器的组合
设备上的 Junos OS Release 16.1 r 或更高版本
概述
从 Junos OS 16.1 R2 开始，您可以定义一个策略，根据社区值识别合格的多个路径前缀。BGP 会将这些与社区标记的路由（除了活动路径）公布到给定目标。如果路由的社区价值与策略中定义的团体值不匹配，则 BGP 不会通告该路由。此功能允许BGP将不超过 20 个路径通告到给定目标。您可以限制和配置 BGP 考虑多个路径的前缀数，而无需事先知道前缀。而已知 BGP 社区值将决定是否通告前缀。
拓扑
在 图 8 中，RR1 和 RR4 是路由反射器。路由器 R2 和 R3 是路由反射器 RR1 的客户端。路由器 R8 是路由反射器 RR4 的客户端。路由器 R5、R6 和路由器 R7 将静态路由重新分布到 BGP 中。路由器 R5 使用群组值4713:100 通告静态路由 199.1.1.1/32 和 198.1.1.1/32。
路由器 RR1 配置为向路由器 RR4 发送最多六条路径（每个目标）。路由器 RR4 配置为向路由器 R8 发送最多六条路径。路由器 R8 配置为从路由器 RR4 接收多个路径。添加路径社区配置限制路由器 RR4 为仅包含 4713：100 社区值的路由发送多个路径。路由器 RR4 过滤并通告仅包含 4714：100 社区值的多路径。
图 8： 示例：根据群组价值配置 BGP 以通告 Multipaths
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后进入从配置模式提交。
路由器 RR1
set interfaces ge-1/0/10 unit 0 description RR1->R2 set interfaces ge-1/0/10 unit 0 family inet address 10.0.12.1/24 set interfaces ge-1/0/11 unit 0 description RR1->RR4 set interfaces ge-1/0/11 unit 0 family inet address 10.0.14.1/24 set interfaces ge-1/0/12 unit 0 description RR1->R5 set interfaces ge-1/0/12 unit 0 family inet address 10.0.15.1/24 set interfaces ge-1/0/13 unit 0 description RR1->R3 set interfaces ge-1/0/13 unit 0 family inet address 10.0.13.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.10/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.10 set protocols bgp group rr cluster 10.0.0.10 set protocols bgp group rr multipath set protocols bgp group rr neighbor 10.0.0.20 set protocols bgp group rr neighbor 10.0.0.30 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.15.2 local-address 10.0.15.1 set protocols bgp group e1 neighbor 10.0.15.2 peer-as 64502 set protocols bgp group rr_rr type internal set protocols bgp group rr_rr local-address 10.0.0.10 set protocols bgp group rr_rr neighbor 10.0.0.40 family inet unicast add-path send path-count 6 set protocols ospf area 0.0.0.0 interface lo0.10 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface ge-1/0/13 set protocols ospf area 0.0.0.0 interface ge-1/0/11 set protocols ospf area 0.0.0.0 interface ge-1/0/12 set routing-options router-id 10.0.0.10 set routing-options autonomous-system 64501
路由器 R2
set interfaces ge-1/0/10 unit 0 description R2->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.12.2/24 set interfaces ge-1/0/11 unit 0 description R2->R6 set interfaces ge-1/0/11 unit 0 family inet address 10.0.26.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.20/32 set protocols bgp group rr local-address 10.0.0.20 set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.26.2 peer-as 64502 set protocols ospf area 0.0.0.0 interface lo0.20 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface ge-1/0/11 set policy-options policy-statement set_nh_self then next-hop self set routing-options autonomous-system 64501
路由器 R3
set interfaces ge-1/0/10 unit 0 description R3->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.13.2/24 set interfaces ge-1/0/11 unit 0 description R3->R7 set interfaces ge-1/0/11 unit 0 family inet address 10.0.37.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.30/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.30 set protocols bgp group rr neighbor 10.0.0.10 export set_nh_self set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.37.2 peer-as 64502 set protocols ospf area 0.0.0.0 interface lo0.30 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface ge-1/0/13 set policy-options policy-statement set_nh_self then next-hop self set routing-options autonomous-system 64501
路由器 RR4
set interfaces ge-1/0/10 unit 0 description RR4->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.14.2/24 set interfaces ge-1/0/11 unit 0 description RR4->R8 set interfaces ge-1/0/11 unit 0 family inet address 10.0.48.1/24 set interfaces lo0 unit 0 family inet address 10.0.0.40/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.40 set protocols bgp group rr family inet unicast add-path receive set protocols bgp group rr neighbor 10.0.0.10 set protocols bgp group rr_client type internal set protocols bgp group rr_client local-address 10.0.0.40 set protocols bgp group rr_client cluster 10.0.0.40 set protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send prefix-policy addpath-communities-send-4713-100 set protocols bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send path-count 6 set protocols ospf area 0.0.0.0 interface ge-1/0/10 set protocols ospf area 0.0.0.0 interface lo0.40 passive set protocols ospf area 0.0.0.0 interface ge-1/0/11 set policy-options community addpath-community-members 4713:100 set policy-options community addpath-communities-send-4713:100 set policy-options policy-statement addpath-communitiesunities-send-4713-100 term term1 from protocol bgp set policy-options policy-statement addpath-communities-send-4713-100 term term1 from community addpath-4713-100-community set policy-options policy-statement addpath-communitiesunities-send-4713-100 term term1 then add-path send-count 6 set policy-options policy-statement addpath-communities-send-4713-100 term term1 then add-path accept set routing-options autonomous-system 64501
路由器 R5
set interfaces ge-1/0/10 unit 0 description R5->RR1 set interfaces ge-1/0/10 unit 0 family inet address 10.0.15.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.50/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.15.1 export s2b set protocols bgp group e1 neighbor 10.0.15.1 peer-as 64501 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then community add addpath-community set policy-options policy-statement s2b then as-path-expand 2 set policy-options policy-statement s2b then accept set policy-options community addpath-community members 4713:100 set routing-options static route 199.1.1.1/32 reject set routing-options static route 198.1.1.1/32 reject set routing-options autonomous-system 64502
路由器 R6
set interfaces ge-1/0/10 unit 0 description R6->R2 set interfaces ge-1/0/10 unit 0 family inet address 10.0.26.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.60/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.26.1 export s2b set protocols bgp group e1 neighbor 10.0.26.1 peer-as 64501 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then community add addpath-community set policy-options policy-statement s2b then accept set policy-options community addpath-community members 4713:100 set routing-options static route 199.1.1.1/32 reject set routing-options static route 198.1.1.1/32 reject set routing-options autonomous-system 64502
路由器 R7
set interfaces ge-1/0/10 unit 0 description R7->R3 set interfaces ge-1/0/10 unit 0 family inet address 10.0.37.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.70/32 set protocols bgp group e1 type external set protocols bgp group e1 neighbor 10.0.37.1 export s2b set protocols bgp group e1 neighbor 10.0.37.1 peer-as 64501 set policy-options policy-statement s2b from protocol static set policy-options policy-statement s2b from protocol direct set policy-options policy-statement s2b then community add addpath-community set policy-options policy-statement s2b then accept set policy-options community addpath-community members 4713:100 set routing-options static route 199.1.1.1/32 reject set routing-options autonomous-system 64502
路由器 R8
set interfaces ge-1/0/10 unit 0 description R8->RR4 set interfaces ge-1/0/10 unit 0 family inet address 10.0.48.2/24 set interfaces lo0 unit 0 family inet address 10.0.0.80/32 set protocols bgp group rr type internal set protocols bgp group rr local-address 10.0.0.80 set protocols bgp group rr neighbor 10.0.0.40 family inet unicast add-path receive set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-1/0/10.8 set routing-options autonomous-system 64501 set chassis fpc 1 pic 0 tunnel-services bandwidth 1g
配置路由器 RR4
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航 CLI 的信息，请参阅Cli 用户指南中的使用配置模式中的 CLI 编辑器。
要配置路由器 RR4：
注：
修改相应接口名称、地址和其他参数之后，对其他路由器重复此过程。
使用 IPv4 地址配置接口。
[edit interfaces] user@RR4# set ge-1/0/10 unit 0 description RR4->RR1 user@RR4# set ge-1/0/10 unit 0 family inet address 10.0.14.2/24 user@RR4# set ge-1/0/11 unit 0 description RR4->R8 user@RR4# set ge-1/0/11 unit 0 family inet address 10.0.48.1/24
配置环回地址。
[edit interfaces] user@RR4# set lo0 unit 0 family inet address 10.0.0.40/32
配置OSPF任何其他内部网关协议 （IGP）。
[edit protocols] user@RR4# set ospf area 0.0.0.0 interface lo0.40 passive user@RR4# set ospf area 0.0.0.0 interface ge-1/0/10 user@RR4# set ospf area 0.0.0.0 interface ge-1/0/11
为路由反射器的客户端配置路由反射器和 rr_client 的两个 IBGP 组 rr。
[edit protocols] user@RR4# set bgp group rr type internal user@RR4# set bgp group rr local-address 10.0.0.40 user@RR4# set bgp group rr family inet unicast add-path receive user@RR4# set bgp group rr neighbor 10.0.0.10 user@RR4# set bgp group rr_client type internal user@RR4# set bgp group rr_client local-address 10.0.0.40 user@RR4# set bgp group rr_client cluster 10.0.0.40
将功能配置为仅发送包含4713:100 社区值的多个路径，并将播发的 multipaths 数限制为6。
[edit protocols] user@RR4# set bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send prefix-policy addpath-communities-send-4713-100 user@RR4# set bgp group rr_client neighbor 10.0.0.80 family inet unicast add-path send path-count 6
定义一个策略
addpath-community-members 4713:100以使用社区值4713:100 过滤前缀，并限制设备向路由器 R8 发送多达16条路径。此限制将覆盖 BGP 组层次结构级别上的先前配置的添加路径发送路径计数为6。[edit policy-options] user@RR4# set community addpath-community-members 4713:100 user@RR4# set community addpath-communities-send-4713:100 user@RR4# set policy-statement addpath-communitiesunities-send-4713-100 term term1 from protocol bgp user@RR4# set policy-statement addpath-communities-send-4713-100 term term1 from community addpath-4713-100-community user@RR4# set policy-statement addpath-communitiesunities-send-4713-100 term term1 then add-path send-count 16 user@RR4# set policy-statement addpath-communities-send-4713-100 term term1 then add-path accept
为 BGP 主机配置路由器 ID 和自治系统。
[edit routing-options] user@RR4# set router-id 10.0.0.40 user@RR4# set autonomous-system 64501
成果
从配置模式， show interfaces输入、 show protocolsshow routing-options、和show policy-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
[edit]
user@RR4# show interfaces
ge-1/0/10 {
unit 0 {
description RR4->RR1;
family inet {
address 10.0.14.2/24;
}
}
}
ge-1/0/11 {
unit 0 {
description RR4->R8;
family inet {
address 10.0.48.1/24;
}
}
}
lo0 {
unit 0 {
family inet {
address 10.0.0.10/32;
}
}
}
[edit]
user@RR4# show protocols
bgp {
group rr {
type internal;
local-address 10.0.0.40;
family inet {
unicast {
add-path {
receive;
}
}
}
neighbor 10.0.0.10;
}
group rr_client {
type internal;
local-address 10.0.0.40;
cluster 10.0.0.40;
neighbor 10.0.0.80 {
family inet {
unicast {
add-path {
send {
prefix-policy addpath-communities-send-4713-100;
path-count 6;
}
}
}
}
}
}
}
ospf {
area 0.0.0.0 {
interface ge-1/0/10.0;
interface lo0.40 {
passive;
}
interface ge-1/0/11.0;
}
}
[edit]
user@RR4# show policy-options
policy-options {
policy-statement addpath-communities-send-4713-100 {
term term1 {
from community addpath-4713-100-community;
}
}
policy-statement addpath-communitiesunities-send-4713-100 {
term term1 {
from protocol bgp;
then {
add-path send-count 16;
}
}
}
}
[edit] user@RR4# show routing-options router-id 10.0.0.40; autonomous-system 64501;
如果您完成了设备配置，请提交配置。
user@RR4# commit
针对
确认配置是否正常工作。
- 验证多路径路由是否已从路由器 RR4 通告至路由器 R8
- 验证路由器 R8 是否接收路由器 RR4 通告的多路径路由
- 验证路由器 RR4 是否仅向路由器 R8 广告具有社区值 4713：100 的多路径路由
验证多路径路由是否已从路由器 RR4 通告至路由器 R8
用途
验证路由器 RR4 是否可以将多个路径发送到路由器 R8。
行动
在操作模式下，在路由器 show route advertising-protocol bgp neighbor-address RR4 上运行 命令。
user@RR4> show route advertising-protocol bgp 10.0.0.80
inet.0: 20 destinations, 23 routes (20 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 10.0.0.50/32 10.0.15.2 100 2 2 I
* 10.0.0.60/32 10.0.0.20 100 2 I
* 10.0.0.70/32 10.0.0.30 100 2 I
* 198.1.1.1/32 10.0.0.20 100 2 I
10.0.15.2 100 2 2 I
* 199.1.1.1/32 10.0.0.20 100 2 I
10.0.0.30 100 2 I
10.0.15.2 100 2 2 I
含义
路由器 RR4 正在向路由器 R8 广告多个路径 10.0.0.20、10.0.0.30 和 10.0.15.2。
验证路由器 R8 是否接收路由器 RR4 通告的多路径路由
用途
验证路由器 R8 是否从路由器 RR4 接收多路径路由。
行动
在操作模式下，在路由器 show route receive-protocol bgp neighbor-address R8 上运行 命令。
user@R8> show route receive-protocol bgp 10.0.0.40
inet.0: 19 destinations, 22 routes (19 active, 0 holddown, 0 hidden)
Prefix Nexthop MED Lclpref AS path
* 10.0.0.50/32 10.0.15.2 100 2 2 I
* 10.0.0.60/32 10.0.0.20 100 2 I
* 10.0.0.70/32 10.0.0.30 100 2 I
* 198.1.1.1/32 10.0.0.20 100 2 I
10.0.15.2 100 2 2 I
* 199.1.1.1/32 10.0.0.20 100 2 I
10.0.0.30 100 2 I
10.0.15.2 100 2 2 I
含义
对于路由 199.1.1.1.1/32，路由器 R8 正在从路由器 RR4 接收多个下一跃点 10.0.0.20、10.0.0.30 和 10.0.15.2。
验证路由器 RR4 是否仅向路由器 R8 广告具有社区值 4713：100 的多路径路由
用途
路由器 RR4 只能将社区值 4713：100 的多路径路由播发至路由器 R8。
行动
在操作模式下，在路由器 show route 199.1.1.1/32 detail RR4 上运行 命令。
user@RR4> show route 199.1.1.1/32 detail
inet.0: 20 destinations, 23 routes (20 active, 0 holddown, 0 hidden)
199.1.1.1/32 (3 entries, 3 announced)
*BGP Preference: 170/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xae0ea90
Next-hop reference count: 6
Source: 10.0.0.10
Next hop type: Router, Next hop index: 1115
Next hop: 10.0.14.1 via ge-1/0/10.4, selected
Session Id: 0x0
Protocol next hop: 10.0.0.20
Indirect next hop: 0xc4091f0 1048581 INH Session ID: 0x0
State: <Active Int Ext>
Local AS: 1 Peer AS: 1
Age: 4d 20:56:53 Metric2: 2
Validation State: unverified
Task: BGP_1.10.0.0.10
Announcement bits (3): 2-KRT 3-BGP_RT_Background 4-Resolve tree 2
AS path: 2 I (Originator)
Cluster list: 10.0.0.10
Originator ID: 10.0.0.20
Communities: 4713:100
Accepted
Localpref: 100
Router ID: 10.0.0.10
Addpath Path ID: 1
BGP Preference: 170/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xae0eb50
Next-hop reference count: 3
Source: 10.0.0.10
Next hop type: Router, Next hop index: 1115
Next hop: 10.0.14.1 via lt-1/0/10.4, selected
Session Id: 0x0
Protocol next hop: 10.0.0.30
Indirect next hop: 0xc409300 1048582 INH Session ID: 0x0
State: <NotBest Int Ext>
Inactive reason: Not Best in its group - Router ID
Local AS: 1 Peer AS: 1
Age: 4d 20:56:53 Metric2: 2
Validation State: unverified
Task: BGP_1.10.0.0.10
Announcement bits (1): 3-BGP_RT_Background
AS path: 2 I (Originator)
Cluster list: 10.0.0.10
Originator ID: 10.0.0.30
Communities: 4713:100
Accepted
Localpref: 100
Router ID: 10.0.0.10
Addpath Path ID: 2
BGP Preference: 170/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xae0e9d0
Next-hop reference count: 4
Source: 10.0.0.10
Next hop type: Router, Next hop index: 1115
Next hop: 10.0.14.1 via lt-1/0/10.4, selected
Session Id: 0x0
Protocol next hop: 10.0.15.2
Indirect next hop: 0xc4090e0 1048580 INH Session ID: 0x0
State: <Int Ext>
Inactive reason: AS path
Local AS: 1 Peer AS: 1
Age: 4d 20:56:53 Metric2: 2
Validation State: unverified
Task: BGP_1.10.0.0.10
Announcement bits (1): 3-BGP_RT_Background
AS path: 2 2 I
Communities: 4713:100
Accepted
Localpref: 100
Router ID: 10.0.0.10
Addpath Path ID: 3
含义
路由器 RR4 正在向路由器 R8 广告三个社区值为 4713：100 的路径。
通过 BGP 多路径配置递归解析
从 Junos OS Release 17.3 R1 开始，当具有单个协议下一跃点的 BGP 前缀通过具有多个解析路径（unilist）的另一个 BGP 前缀进行解析时，将选择所有路径以用于协议下一跃点解析。在早期的 Junos OS 版本中，仅为协议下一跃点解析选取其中一个路径，因为解析器不支持 IBGP 多路径路由的所有路径上的负载平衡。路由协议进程中的解析器（rpd）将协议下一跳地址（PNH）解析为立即转发下一个跳跃。BGP 递归解析功能增强了解析器以解析 IBGP 多路径路由上的路由，并使用所有可行路径作为下一个跃点。此功能受益于密集互连网络，其中 BGP 用于使用高同等成本的多路径和无缝 MPLS 拓扑建立基础架构连接，例如 WAN 网络。
开始配置 BGP 多路径的递归分辨率之前，必须执行以下操作：
配置设备接口。
配置 OSPF 或任何其他 IGP 协议。
配置 MPLS 和 LDP。
配置 BGP。
要配置多路径上的递归解析，
另请参阅
为 RSVP 和 LDP Lsp 配置 ECMP 下一跳跃以实现负载平衡
Junos OS 支持具有增强的 CFEB、M320、M120、MX 系列和 T Series 路由器以及路由设备的 M10i 路由器上的 RSVP 和 LDP Lsp 的16、32或64等高成本多路径（ECMP）下一跃点的配置。对于具有大容量流量的网络，这提供了更大的灵活性，可在多达 64 Lsp 上对流量进行负载平衡。
要配置 ECMP 下一跃点的最大限制， maximum-ecmp next-hops请将语句[edit chassis]包含在层次结构级别：
[edit chassis] maximum-ecmp next-hops;
您可以使用此语句，将最大 ECMP 下一跳跃限制配置为16、32或64。默认限制为16。
注：
安装有一个或多个模块化端口集中器（MPC）卡、Junos OS 11.4 或更低版本）的 MX 系列路由器maximum-ecmp支持仅有16个 next 跃点的语句配置。不应使用32或maximum-ecmp 64 next 跃点配置语句。使用32或64下一跃点提交配置时，将显示以下警告消息：
Error: Number of members in Unilist NH exceeds the maximum supported 16 on Trio.
以下类型的路由支持 ECMP 最大下一跃点配置，适用于多达 64 ECMP 网关：
具有直接和间接的下一中继站 ECMPs 的静态 IPv4 和 IPv6 路由
通过关联 IGP 路由获知的 LDP 入口和中转路由
RSVP ECMP 为 Lsp 创建的下一跃点
OSPF IPv4 和 IPv6 路由 ECMPs
IS-IS IPv4 和 IPv6 路由 ECMPs
EBGP IPv4 和 IPv6 路由 ECMPs
IBGP （通过 IGP 路由进行解析） IPv4 和 IPv6 路由 ECMPs
最多 64 ECMP 的增强型 ECMP 限制也适用于第3层 Vpn、第2层 Vpn、2层电路和 VPLS 服务，可通过 MPLS 路由进行解析，因为 MPLS 路由中的可用 ECMP 路径也可以供此类流量使用。
注：
以下 Fpc on M320、T640 和 T1600 路由器仅支持 16 ECMP 下一跃点：
（仅 M320、T640 和 T1600 路由器）增强型 II FPC1
（仅 M320、T640 和 T1600 路由器）增强型 II FPC2
（仅限 M320 和 T640 路由器）增强型 II FPC3
（仅限 T640 和 T1600 路由器）FPC2
（仅限 T640 和 T1600 路由器）FPC3
如果安装了上述任何 Fpc 的 M320、 32 T640 64或 T1600 路由器上的最大 ECMP 下跳跃限制或配置，则这些 Fpc 上的数据包转发引擎将仅使用前 16 ECMP 下一跃点。对于仅支持 16 ECMP 下一跃点的 Fpc 上的数据包转发引擎，如果最多 ECMP 下一中继站32或64配置了，则 Junos OS 将生成系统日志消息。但是，对于在路由器上安装的其他 Fpc 上的数据包转发引擎，最大配置的32 ECMP 64限制或 ECMP 的下一跃点均适用。
注：
如果 RSVP Lsp 配置了带宽分配，则对于 ECMP 的下一跃点，具有超过16个 Lsp，流量将根据配置的带宽进行最佳分配。具有较小分配带宽的某些 Lsp 的流量比使用更高带宽的配置所得到的信息流多。流量分布并不严格符合配置的带宽分配。此注意事项适用于以下路由器：
T1600 和 T640 路由器增强了扩展 FPC1，增强型扩展 FPC2，增强型扩展 FPC3，增强型扩展 FPC 4，以及所有类型 4 Fpc
具有增强型 III FPC1、增强型 III FPC2 和增强型 III FPC3 的 M320 路由器
MX 系列路由器，具有所有类型的 Fpc 和 Dpc，不包括 Mpc。此注意事项不适用于带有基于 Junos Trio 芯片组的线卡的 MX 系列路由器。
1类、2类和3类 M120 路由器 Fpc
具有增强 CFEB 的 M10i 路由器
支持增强的负载平衡功能的 T Series 路由器上的下一跳克隆和排列（增强型扩展 FPC1、增强型扩展 FPC2、增强型扩展 FPC3 和增强型扩展 FPC 4）禁用。因此，对于高度扩展系统，在 ECMP 或聚合接口上具有大量下一跃点的内存利用率将减少。具有类型 4 Fpc 的 T Series 路由器上也禁用了下一跳克隆和排列。
要查看 ECMP 下一个跳跃的详细信息，请发出show route命令。show route summary command还显示最大 ECMP 限制的当前配置。要查看 ECMP LDP 路径的详细信息，请发出traceroute mpls ldp命令。
另请参阅
为 ECMP 组配置一致的负载平衡
按数据包负载平衡允许您跨多个等成本路径传播流量。默认情况下，当一个或多个路径发生故障时，哈希算法将重新计算所有路径的下一跳跃，通常会导致重新分配所有流。一致负载平衡允许您覆盖此行为，以便仅重定向处于非活动状态的链路的信息流。所有现有活动流都保持不中断。在数据中心环境中，链路发生故障时，所有流的重新分配可能导致重大信息流丢失或链路保持活动的服务器的服务中断。一致负载平衡维护所有活动链路，而仅重新映射受一个或多个链路故障影响的那些信息流。此功能可确保连接到保持活动的链路的流继续不中断。
此功能适用于在单跳 BGP 会话中，同等成本多路径（ECMP）组的成员是外部 BGP 相邻的拓扑。添加新 ECMP 路径或以任何方式修改现有路径时，一致的负载平衡不适用。要添加具有最小中断的新路径，请在不修改现有路径的情况下定义新的 ECMP 组。通过这种方式，客户端可以在不终止现有连接的情况下逐渐移动到新组。
（在 MX 系列上）仅支持模块化端口集中器（Mpc）。
IPv4 和 IPv6 路径均受支持。
也支持作为虚拟路由和转发（VRF）实例或其他路由实例的一部分的 ECMP 组。
不支持多播信息流。
支持聚合接口，但链路聚合（LAG）束成员不支持一致负载平衡。当一个或多个成员链路发生故障时，来自 LAG 束的活动成员的流量可能会移至另一个活动成员。当一个或多个 LAG 成员链路发生故障时，信息流会 rehashed。
强烈建议对每个路由器或交换机将一致的负载平衡应用到最多1000个 IP 前缀。
支持集成路由和桥接（IRB）接口的3层邻接关系。
当 ECMP 组中的一个或多个路径发生故障时，可将 BGP添加路径功能配置为启用新的主动路径的故障路径更换。配置更换故障路径可确保仅重定向故障路径上的信息流。活动路径上的信息流将保持不变。
注：
在通用路由封装（GRE）通道接口上配置一致负载平衡时，必须指定远端 GRE 接口的 inet 地址，以便将 GRE 通道接口上的第3层邻接正确安装在转发表。但是，在一致负载平衡期间，不支持通过 GRE 通道接口的 ECMP 快速重新路由（FRR）。您可以在
[edit interfaces interface name unit unit name family inet address address]层次结构级别上为配置具有一致负载平衡的路由器指定目标地址。例如：[edit interfaces] user@host# set interfaces gr-4/0/0 unit 21 family inet address 10.10.31.2/32 destination 10.10.31.1
有关通用路由封装的详细信息，请参阅配置通用路由封装隧道。
一致负载平衡不支持 EBGP 邻居 BGP 多跳。因此，不要在配置有
multihop一致负载平衡的设备上启用该选项。
要为 ECMP 组配置一致的负载平衡：
另请参阅
了解标记为单播 LSP 的 BGP 的熵标签
什么是熵标签？
平均信息量标签是一种特殊负载平衡标签，可增强路由器跨等价多路径 （ECMP） 路径或链路聚合组 （GS） 负载平衡流量的能力。熵标签允许路由器仅使用标签堆栈（而非深度包检测（DPI））高效地平衡流量负载。DPI 需要的路由器处理能力更多，并非所有路由器共享的功能。
当 IP 数据包有多条路径可到达其目标时，Junos OS 将使用数据包标头的某些字段将数据包散列为确定性路径。数据包的源或目标地址和端口号用于散列，以避免给定流的数据包重新排序。如果核心标签交换路由器（LSR）不能执行 DPI 来识别流或不能在线速执行此操作，则仅使用标签堆栈进行 ECMP 哈希。这需要一个熵标签，这是一个可传输信息流信息的特殊负载平衡标签。入口 LSR 具有比传输 Lsr 更多的关于传入数据包的上下文和信息。因此，入口标签边缘路由器（LER）可以检查数据包的流信息，将其映射到熵标签，然后将其插入标签堆栈中。Lsr 在核心中，只需将熵标签用作将数据包哈希到正确路径的密钥。
熵标签可以是16到1048575之间的任何标签值（常规的20位标签范围）。由于此范围与现有常规标签区域重叠，因此称为熵标签标记（黎国）的特殊标签将插入熵标签之前。黎国是一种特殊标签，其值为 7 IANA。
图 9 说明了 RSVP 标签交换系列 （LSP） 数据包标签堆栈中的平均信息量标签。标签堆栈由熵标签标记（国明）、熵标签和 IP 数据包组成。
图 9： RSVP LSP 的熵标签
标记为单播的 BGP 的熵标签
BGP 标记的单播跨多个内部网关协议（IGP）区域或多个自治系统（内部 Lsp）连接 RSVP 或 LDP Lsp。当入口 Pe 和出口 Pe 位于不同 IGP 区域时，标记为单播 Lsp 的区域间 BGP 通常会携带 VPN 和 IP 流量。当 BGP 标记的单播连接 RSVP 或 LDP Lsp 时，Junos OS 会在标记为单播 LSP 入口的 BGP 上插入熵标签，以实现端到端熵标签负载平衡。这是因为 RSVP 或 LDP 熵标签通常在倒数第二跳跃节点与 RSVP 或 LDP 标签一起弹出，而在中间点处没有熵标签，也就是两个区域或两个 As 之间的路由器。因此，在缺少平均信息量标签的情况下，拼接点的路由器使用BGP标签来转发数据包。说明了 RSVP BGP堆栈中带有平均信息量标签的组播单播 图 10 数据包标签堆栈。RSVP 标签堆栈由熵标签标记（黎国）、熵标签、BGP 标签和 IP 数据包组成。RSVP 熵标签在倒数第二跳跃节点上弹出。
图 10： 区域间 BGP 标记为使用 RSVP 熵的单播标签
标记为单播缝合节点的 BGP 不能使用熵标签进行负载平衡，除非结算节点在 BGP 出口时发出熵标记功能。如果对提供商边缘路由器 BGP 熵标签功能（ELC） BGP 标记为单播缝合节点信号，则标记为单播 LSP 入口的 BGP 将注意到标记为单播 LSP 出口的 BGP 可以处理熵标签，并插入熵标签标记和BGP 标签下面的熵标签。所有 Lsr 都可以使用熵标签进行负载平衡。虽然BGP单播 LSP 可能跨不同区域或多个路由器和 AS，但某些分段可能支持平均信息量标签，而其他分段可能不支持。 图 11 说明了该标签堆栈中的平均BGP值标签。位于缝合节点的标签堆栈由黎国明、熵标签和 IP 数据包组成。
图 11： 在带缝合点的 BGP 熵标签的区域间 BGP 标记为单播
注：
要禁用在出口节点上标记为 unicast 的 BGP 的熵标签功能，请在no-entropy-label-capability[edit policy-options policy-statement policy-name then]层次结构级别上使用选项定义策略。
[edit policy-options policy-statement policy-name then]user@PE#no-entropy-label-capability
默认情况下，支持熵标签的路由器在[edit forwarding-options]层次结构级别上配置了负载平衡标签功能声明，以基于每个 LSP 指示标签。如果对等路由器未配置为可处理负载平衡标签，则可通过在no-load-balance-label-capability[edit forwarding-options]层次结构级别上对此语句来阻止熵标签功能的信号。
[edit forwarding-options]user@PE#no-load-balance-label-capability
支持和不支持的功能
Junos OS 支持在以下情况下标记为单播的 BGP 的熵标签：
Lsp 的所有节点都有熵标签功能。
Lsp 的某些节点具有熵标签功能。
LSP 通过另一运营商的 VPN 隧道。
定义入口策略以选择 BGP 标记为单播 Lsp 的一部分，以便在入口处插入熵标签。
定义用于禁用熵标签功能通告的出口政策。
Junos OS 不支持以下功能，以获取标记为单播的 BGP 的熵标签：
当 BGP 标记单播 LSP 通过另一运营商的 VPN 进行隧道时，没有真正的端到端平均信息量标签，因为 Junos OS 不会在运营商-运营商网络网络 VPN 标签下面插入平均信息量标签或平均信息量标签。
目前，Junos OS 不支持使用自己的熵标签标记为单播 Lsp 的 IPv6 BGP。但是，标记为单路广播 Lsp 的 IPv6 BGP 可能会使用来自底层 RSVP、LDP 或 BGP Lsp 的熵标签。
另请参阅
为标记为单播 LSP 的 BGP 配置熵标签
为标记为单播 LSP 的 BGP 配置熵标签，以实现端到端熵标签负载平衡。熵标签是一种特殊的负载平衡标签，可传输数据包的信息流信息。标记为单播的 BGP 通常跨多个 IGP 区域或多个自治系统（As）连接 RSVP 或 LDP Lsp。RSVP 或 LDP 熵标签将在倒数第二跳跃节点与 RSVP 或 LDP 标签一起弹出。此功能支持在中间点（即两个区域或 As 之间的路由器）使用熵标签，以实现用于 BGP 流量的端到端熵标签负载平衡。此功能支持在标记为单播 LSP 入口的 BGP 中插入熵标签。
熵标签可以是16到1048575之间的任何标签值（常规的20位标签范围）。由于此范围与现有常规标签区域重叠，因此称为熵标签标记（黎国）的特殊标签将插入熵标签之前。黎国是一种特殊标签，其值为 7 IANA。
在为标记为单播的 BGP 配置熵标签之前，请确保：
配置设备接口。
配置 OSPF 或任何其他 IGP 协议。
配置 BGP。
配置 LDP。
配置 RSVP。
配置 MPLS。
要为标记为单播 LSP 的 BGP 配置熵标签：
另请参阅
示例：为标记为单播 LSP 的 BGP 配置熵标签
此示例演示如何为标记为单播的 BGP 配置熵标签，以便使用熵标签实现端到端负载平衡。当 IP 数据包有多条路径可到达其目标时，Junos OS 将使用数据包标头的某些字段将数据包散列为确定性路径。这需要一个熵标签，这是一个可传输信息流信息的特殊负载平衡标签。Lsr 在核心中，只需将熵标签用作将数据包散列为正确路径的密钥即可。熵标签可以是16到1048575之间的任何标签值（常规的20位标签范围）。由于此范围与现有常规标签区域重叠，因此称为熵标签标记（黎国）的特殊标签将插入熵标签之前。黎国是一种特殊标签，其值为 7 IANA。
标记为单播的 BGP 通常跨多个 IGP 区域或多个自治系统连接 RSVP 或 LDP Lsp。RSVP 或 LDP 熵标签将在倒数第二跳跃节点与 RSVP 或 LDP 标签一起弹出。此功能允许在中间点使用熵标签，以弥补倒数第二跳跃节点与缝合点之间的差距，以便为 BGP 流量实现端到端熵标签负载平衡。
要求
此示例使用以下硬件和软件组件：
七个带 Mpc 的 MX 系列路由器
在所有设备上运行 Junos OS Release 15.1 或更高版本
在为标记为单播的 BGP 配置熵标签之前，请确保：
配置设备接口。
配置 OSPF 或任何其他 IGP 协议。
配置 BGP。
配置 RSVP。
配置 MPLS。
概述
当 BGP 标记的单播跨多个 IGP 区域或多个自治系统连接 RSVP 或 LDP Lsp 时，RSVP 或 LDP 熵标签将在倒数第二跳跃节点上弹出，同时 RSVP 或 LDP 标签。但是，在这些缝合点（即两个区域之间的路由器）中没有熵标签。因此，使用 BGP 标签来转发数据包的装订点上的路由器。
从 Junos OS 版本15.1 开始，您可以为带有单播的 BGP 配置熵标签，以实现端到端熵标签负载平衡。此功能允许在准备点使用熵标签，以便实现 BGP 流量的端到端熵标签负载平衡。Junos OS 允许在标记为单播 LSP 入口的 BGP 中插入熵标签。
默认情况下，支持熵标签的路由器配置为load-balance-label-capability[edit forwarding-options]层次结构级别上的语句，以每个 LSP 指示标签。如果对等路由器未配置为可处理负载平衡标签，则可以通过在no-load-balance-label-capability[edit forwarding-options]层次结构级别上对熵标签功能加以限制，从而避免信号。
[edit forwarding-options]user@PE#no-load-balance-label-capability
注：
您可以使用no-entropy-label-capability[edit policy-options policy-statement policy name then]层次结构选项在策略中指定的路由，显式禁用广告熵标签功能。
[edit policy-options policy-statement policy-name then]user@PE#no-entropy-label-capability
拓扑
在图 12中，路由器 PE1 是入口路由器，路由器 PE2 是出口路由器。路由器 P1 和 P2 是传输路由器。路由器 ABR 是区域0与区域1之间的区域桥接路由器。LAG 在提供商路由器上配置，用于负载平衡流量。入口路由器 PE1 上启用了标记为 unicast 的 BGP 的熵标签功能。
图 12： 为标记为单播的 BGP 配置熵标签
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后从commit配置模式进入。
路由器 PE1
set interfaces ge-0/0/0 unit 0 family inet address 1.5.0.1/24 set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/0 unit 0 family inet6 address 2000::1:5:0:1/120 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 unit 0 family inet address 1.1.0.1/24 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family inet6 address 2000::1:1:0:1/120 set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 unit 0 family inet address 50.0.1.1/24 set interfaces ge-0/0/2 unit 0 family inet6 address 2000::1:34:0:2/120 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 520 set interfaces ge-0/0/3 unit 0 family inet address 1.0.0.2/16 set interfaces lo0 unit 0 family inet address 10.255.101.100/32 primary set routing-options router-id 10.255.101.100 set routing-options autonomous-system 1 set protocols rsvp interface all set protocols mpls icmp-tunneling set protocols mpls no-cspf set protocols mpls label-switched-path r0-r2 to 10.255.102.102 set protocols mpls label-switched-path r0-r2 entropy-label set protocols mpls interface all set protocols bgp group ibgp type internal set protocols bgp group ibgp local-address 10.255.101.100 set protocols bgp group ibgp family inet labeled-unicast entropy-label set protocols bgp group ibgp neighbor 10.255.102.102 family inet labeled-unicast rib inet.3 set protocols bgp group ibgp neighbor 10.255.101.200 family inet-vpn unicast set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface all set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.0 interface lo0.0 passive set policy-options prefix-list el-fec 10.255.101.200/32 set policy-options prefix-list el-fec-2 10.255.102.102/32 set policy-options policy-statement EL from prefix-list el-fec set policy-options policy-statement EL then accept set policy-options policy-statement EL-2 from prefix-list el-fec-2 set policy-options policy-statement EL-2 then accept set policy-options policy-statement bgp-to-ospf from protocol bgp set policy-options policy-statement bgp-to-ospf then accept set policy-options policy-statement ospf-to-bgp from protocol ospf set policy-options policy-statement ospf-to-bgp then accept set policy-options policy-statement stat-to-bgp from protocol static set policy-options policy-statement stat-to-bgp then accept set policy-options community VPN members target:100:1 set routing-instances VPN-l3vpn instance-type vrf set routing-instances VPN-l3vpn interface ge-0/0/2.0 set routing-instances VPN-l3vpn interface ge-0/0/3.0 set routing-instances VPN-l3vpn route-distinguisher 100.100.100.100:100 set routing-instances VPN-l3vpn vrf-target target:100:1 set routing-instances VPN-l3vpn routing-options static route 5.0.0.0/16 next-hop 1.0.0.1 set routing-instances VPN-l3vpn protocols ospf export bgp-to-ospf set routing-instances VPN-l3vpn protocols ospf area 0.0.0.0 interface ge-0/0/2.0
路由器 P1
set interfaces ge-0/0/0 unit 0 family inet address 1.5.0.2/24 set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/0 unit 0 family inet6 address 2000::1:5:0:2/120 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 gigether-options 802.3ad ae0 set interfaces ge-0/0/2 unit 0 family inet address 1.1.0.2/24 set interfaces ge-0/0/2 unit 0 family iso set interfaces ge-0/0/2 unit 0 family inet6 address 2000::1:1:0:2/120 set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/3 gigether-options 802.3ad ae0 set interfaces ae0 unit 0 family inet address 1.12.0.1/24 set interfaces ae0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.101/32 primary set forwarding-options hash-key family mpls label-1 set forwarding-options hash-key family mpls label-2 set forwarding-options hash-key family mpls label-3 set forwarding-options enhanced-hash-key family mpls no-payload set routing-options router-id 10.255.102.101 set routing-options autonomous-system 1 set routing-options forwarding-table export pplb set protocols rsvp interface all set protocols mpls icmp-tunneling set protocols mpls interface all set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.0 interface all set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 set policy-options policy-statement pplb then load-balance per-packet
路由器 ABR
set interfaces ge-0/0/0 gigether-options 802.3ad ae0 set interfaces ge-0/0/1 gigether-options 802.3ad ae1 set interfaces ge-0/0/2 gigether-options 802.3ad ae0 set interfaces ge-0/0/3 gigether-options 802.3ad ae1 set interfaces ae0 unit 0 family inet address 1.12.0.2/24 set interfaces ae0 unit 0 family mpls set interfaces ae1 unit 0 family inet address 1.23.0.1/24 set interfaces ae1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.102/32 primary set forwarding-options hash-key family mpls label-1 set forwarding-options hash-key family mpls label-2 set forwarding-options hash-key family mpls label-3 set forwarding-options enhanced-hash-key family mpls no-payload set routing-options router-id 10.255.102.102 set routing-options autonomous-system 1 set routing-options forwarding-table export pplb set protocols rsvp interface all set protocols mpls icmp-tunneling set protocols mpls label-switched-path r2-r0 to 10.255.101.100 set protocols mpls label-switched-path r2-r0 entropy-label set protocols mpls label-switched-path r2-r4 to 10.255.101.200 set protocols mpls label-switched-path r2-r4 entropy-label set protocols mpls interface all set protocols bgp group ibgp type internal set protocols bgp group ibgp local-address 10.255.102.102 set protocols bgp group ibgp family inet labeled-unicast rib inet.3 set protocols bgp group ibgp neighbor 10.255.101.100 export send-inet3-R4 set protocols bgp group ibgp neighbor 10.255.101.200 export send-inet3-R0 set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 set protocols ospf area 0.0.0.0 interface ae0.0 set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.1 interface ge-0/0/3.0 set protocols ospf area 0.0.0.1 interface ge-0/0/1.0 set protocols ospf area 0.0.0.1 interface ae1.0 set protocols ldp interface all set policy-options policy-statement pplb then load-balance per-packet set policy-options policy-statement send-inet3-R0 from route-filter 10.255.101.100/32 exact set policy-options policy-statement send-inet3-R0 then accept set policy-options policy-statement send-inet3-R4 from route-filter 10.255.101.200/32 exact set policy-options policy-statement send-inet3-R4 then accept
路由器 P2
set chassis aggregated-devices ethernet device-count 3 set interfaces ge-0/0/0 gigether-options 802.3ad ae0 set interfaces ge-0/0/1 unit 0 family inet address 1.34.0.1/24 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family inet6 address 2000::1:34:0:1/120 set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 gigether-options 802.3ad ae0 set interfaces ae1 unit 0 family inet address 1.23.0.2/24 set interfaces ae1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.102.103/32 primary set forwarding-options enhanced-hash-key family mpls no-payload set routing-options router-id 10.255.102.103 set routing-options autonomous-system 1 set routing-options forwarding-table export pplb set protocols rsvp interface all set protocols mpls icmp-tunneling set protocols mpls interface all set protocols ospf traffic-engineering set protocols ospf area 0.0.0.1 interface lo0.0 passive set protocols ospf area 0.0.0.1 interface fxp0.0 disable set protocols ospf area 0.0.0.1 interface all set policy-options policy-statement pplb then load-balance per-packet
路由器 PE2
set interfaces ge-0/0/0 unit 0 family inet address 1.34.0.2/24 set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/0 unit 0 family inet6 address 2000::1:34:0:2/120 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 520 set interfaces ge-0/0/1 unit 0 family inet address 2.0.0.2/16 set interfaces ge-0/0/2 unit 0 family inet address 50.4.1.1/24 set interfaces ge-0/0/2 unit 0 family inet6 address 2000::1:34:0:2/120 set interfaces lo0 unit 0 family inet address 10.255.101.200/32 primary set routing-options router-id 10.255.101.200 set routing-options autonomous-system 1 set protocols rsvp interface all set protocols mpls icmp-tunneling set protocols mpls no-cspf set protocols mpls label-switched-path r4-r2 to 10.255.102.102 set protocols mpls label-switched-path r4-r2 entropy-label set protocols mpls interface all set protocols bgp group ibgp type internal set protocols bgp group ibgp local-address 10.255.101.200 set protocols bgp group ibgp neighbor 10.255.102.102 family inet labeled-unicast rib inet.3 set protocols bgp group ibgp neighbor 10.255.101.100 family inet-vpn unicast set protocols ospf traffic-engineering set protocols ospf area 0.0.0.1 interface all set protocols ospf area 0.0.0.1 interface fxp0.0 disable set protocols ospf area 0.0.0.1 interface lo0.0 passive set policy-options prefix-list el-fec 10.255.101.100/32 set policy-options policy-statement EL term el from prefix-list el-fec set policy-options policy-statement EL term el then accept set policy-options policy-statement bgp-to-ospf from protocol bgp set policy-options policy-statement bgp-to-ospf then accept set policy-options policy-statement ospf-to-bgp from protocol ospf set policy-options policy-statement ospf-to-bgp then accept set policy-options policy-statement stat-to-bgp from protocol static set policy-options policy-statement stat-to-bgp then accept set policy-options community VPN members target:100:1 set routing-instances VPN-l3vpn instance-type vrf set routing-instances VPN-l3vpn interface ge-0/0/1.0 set routing-instances VPN-l3vpn interface ge-0/0/2.0 set routing-instances VPN-l3vpn route-distinguisher 100.100.100.100:104 set routing-instances VPN-l3vpn vrf-target target:100:1 set routing-instances VPN-l3vpn routing-options static route 6.0.0.0/16 next-hop 2.0.0.1 set routing-instances VPN-l3vpn protocols ospf export bgp-to-ospf set routing-instances VPN-l3vpn protocols ospf area 0.0.0.0 interface ge-0/0/2.0 set routing-instances VPN-l3vpn protocols ospf area 0.0.0.0 interface ge-0/0/1.0
配置路由器 PE1
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航 CLI 的信息，请参阅Cli 用户指南中的使用配置模式中的 CLI 编辑器。
要配置路由器 PE1：
注：
修改相应的接口名称、地址和其他参数后，对路由器 PE2 重复此过程。
使用 IPv4 和 IPv6 地址配置接口。
[edit interfaces] user@PE1# set ge-0/0/0 unit 0 family inet address 1.5.0.1/24 user@PE1# set ge-0/0/0 unit 0 family iso user@PE1# set ge-0/0/0 unit 0 family inet6 address 2000::1:5:0:1/120 user@PE1# set ge-0/0/0 unit 0 family mpls user@PE1# set ge-0/0/1 unit 0 family inet address 1.1.0.1/24 user@PE1# set ge-0/0/1 unit 0 family iso user@PE1# set ge-0/0/1 unit 0 family inet6 address 2000::1:1:0:1/120 user@PE1# set ge-0/0/1 unit 0 family mpls user@PE1# set ge-0/0/2 unit 0 family inet address 50.0.1.1/24 user@PE1# set ge-0/0/2 unit 0 family inet6 address 2000::1:34:0:2/120 user@PE1# set ge-0/0/3 vlan-tagging user@PE1# set ge-0/0/3 unit 0 vlan-id 520 user@PE1# set ge-0/0/3 unit 0 family inet address 1.0.0.2/16
配置回传接口。
[edit interfaces] user@PE1# set lo0 unit 0 family inet address 10.255.101.100/32 primary
设置路由器 ID 和自治系统编号。
[edit routing-options] user@PE1# set router-id 10.255.101.100 user@PE1# set autonomous-system 1
为所有接口配置 RSVP 协议。
[edit protocols] user@PE1# set protocols rsvp interface all
在路由器 PE1 的所有接口上启用 MPLS 并指定 LSP。
[edit protocols] user@PE1# set mpls icmp-tunneling user@PE1# set mpls no-cspf user@PE1# set mpls label-switched-path r0-r2 to 10.255.102.102 user@PE1# set mpls label-switched-path r0-r2 entropy-label user@PE1# set mpls interface all
在内部路由器上配置 IBGP。
[edit protocols] user@PE1# set bgp group ibgp type internal user@PE1# set bgp group ibgp local-address 10.255.101.100
为用于内部 BGP group ibgp 的标记为单播的 BGP 启用熵标签功能。
user@PE1# set bgp group ibgp family inet labeled-unicast entropy-label user@PE1# set bgp group ibgp neighbor 10.255.102.102 family inet labeled-unicast rib inet.3 user@PE1# set bgp group ibgp neighbor 10.255.101.200 family inet-vpn unicast
在区域边界路由器（ABR）的所有接口上启用 OSPF 协议。
[edit protocols] user@PE1# set ospf traffic-engineering user@PE1# set ospf area 0.0.0.0 interface all user@PE1# set ospf area 0.0.0.0 interface fxp0.0 disable user@PE1# set ospf area 0.0.0.0 interface lo0.0 passive
定义前缀列表以指定具有熵标签功能的路由。
[edit policy-options ] user@PE1# set policy-options prefix-list el-fec 10.255.101.200/32 user@PE1# set policy-options prefix-list el-fec-2 10.255.102.102/32
定义策略 EL 以指定具有熵标签功能的路由。
[edit policy-options ] user@PE1# set policy-statement EL from prefix-list el-fec user@PE1# set policy-statement EL then accept
定义另一个策略 EL-2，以指定具有熵标签功能的路由。
[edit policy-options ] user@PE1# set policy-statement EL-2 from prefix-list el-fec-2 user@PE1# set policy-statement EL-2 then accept
定义将 BGP 路由导出到 OSPF 路由表的策略。
[edit policy-options ] user@PE1# set policy-statement bgp-to-ospf from protocol bgp user@PE1# set policy-statement bgp-to-ospf then accept
定义将 OSPF 路由导出到 BGP 路由表的策略。
[edit policy-options ] user@PE1# set policy-statement ospf-to-bgp from protocol ospf user@PE1# set policy-statement ospf-to-bgp then accept
定义将静态路由导出至 BGP 路由表的策略。
[edit policy-options ] user@PE1# set policy-statement stat-to-bgp from protocol static user@PE1# set policy-statement stat-to-bgp then accept
为 VPN 社区配置 VPN 目标。
[edit policy-options ] user@PE1# set community VPN members target:100:1
配置3层 VPN 路由实例 VPN-l3vpn。
[edit routing-instances] user@PE1# set VPN-l3vpn instance-type vrf
为 VPN-l3vpn 路由实例分配接口。
[edit routing-instances] user@PE1# set VPN-l3vpn interface ge-0/0/2.0 user@PE1# set VPN-l3vpn interface ge-0/0/3.0
为 VPN-l3vpn 路由实例配置路由 distinguisher。
[edit routing-instances] user@PE1# set VPN-l3vpn route-distinguisher 100.100.100.100:100
为 VPN-l3vpn 路由实例配置 VPN 路由和转发（VRF）目标。
[edit routing-instances] user@PE1# set VPN-l3vpn vrf-target target:100:1
使用 VPN-l3vpn 路由实例的第3层 VPN 协议配置到设备 CE1 的静态路由。
[edit routing-instances] user@PE1# set VPN-l3vpn routing-options static route 5.0.0.0/16 next-hop 1.0.0.1
将 BGP 路由导出到 VPN l3vpn 路由实例的 OSPF 路由表。
[edit routing-instances] user@PE1# set VPN-l3vpn protocols ospf export bgp-to-ospf
为 VPN l3vpn 路由实例分配 OSPF 接口。
[edit routing-instances] user@PE1# set VPN-l3vpn protocols ospf area 0.0.0.0 interface ge-0/0/2.0
配置路由器 P1
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航 CLI 的信息，请参阅Cli 用户指南中的使用配置模式中的 CLI 编辑器。
要配置路由器 P1：
注：
修改相应的接口名称、地址和其他参数后，对路由器 P2 重复此过程。
使用 IPv4 和 IPv6 地址配置接口。
[edit interfaces] user@P1# set ge-0/0/0 unit 0 family inet address 1.5.0.2/24 user@P1# set ge-0/0/0 unit 0 family iso user@P1# set ge-0/0/0 unit 0 family inet6 address 2000::1:5:0:2/120 user@P1# set ge-0/0/0 unit 0 family mpls user@P1# set ge-0/0/2 unit 0 family inet address 1.1.0.2/24 user@P1# set ge-0/0/2 unit 0 family iso user@P1# set ge-0/0/2 unit 0 family inet6 address 2000::1:1:0:2/120 user@P1# set ge-0/0/2 unit 0 family mpls user@P1# set ge-0/0/1 gigether-options 802.3ad ae0 user@P1# set ge-0/0/3 gigether-options 802.3ad ae0
在接口上配置链路聚合。
user@P1# set ae0 unit 0 family inet address 1.12.0.1/24 user@P1# set ae0 unit 0 family mpls
配置回传接口。
[edit interfaces] user@P1# set lo0 unit 0 family inet address 10.255.102.101/32 primary
配置路由器用于将数据包散列到其目的地以实现负载平衡的 MPLS 标签。
[edit forwarding-options] user@P1# set hash-key family mpls label-1 user@P1# set hash-key family mpls label-2 user@P1# set hash-key family mpls label-3 user@P1# set enhanced-hash-key family mpls no-payload
设置路由器 ID 和自治系统编号。
[edit routing-options] user@P1# set router-id 10.255.102.101 user@P1# set autonomous-system 1
启用每个数据包负载平衡。
[edit routing-options] user@P1# set forwarding-table export pplb
为所有接口配置 RSVP 协议。
[edit protocols] user@P1# set protocols rsvp interface all
在路由器 P1 的所有接口上启用 MPLS 并指定 LSP。
[edit protocols] user@P1# set protocols mpls icmp-tunneling user@P1# set protocols mpls interface all
在不包括管理接口的路由器 P1 的所有接口上启用 OSPF 协议。
[edit protocols] user@P1# set protocols ospf traffic-engineering user@P1# set protocols ospf area 0.0.0.0 interface lo0.0 passive user@P1# set protocols ospf area 0.0.0.0 interface fxp0.0 disable user@P1# set protocols ospf area 0.0.0.0 interface all user@P1# set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 user@P1# set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
定义每个数据包负载平衡的策略。
[edit policy-options]] user@P1# set policy-statement pplb then load-balance per-packet
配置路由器 ABR
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航 CLI 的信息，请参阅Cli 用户指南中的使用配置模式中的 CLI 编辑器。
要配置路由器 ABR：
使用 IPv4 和 IPv6 地址配置接口。
[edit interfaces] user@ABR# set ge-0/0/0 gigether-options 802.3ad ae0 user@ABR# set ge-0/0/1 gigether-options 802.3ad ae1 user@ABR# set ge-0/0/2 gigether-options 802.3ad ae0 user@ABR# set ge-0/0/3 gigether-options 802.3ad ae1
配置回传接口。
[edit interfaces] user@ABR# set lo0 unit 0 family inet address 10.255.102.102/32 primary
在接口上配置链路聚合。
[edit interfaces] user@ABR# set ae0 unit 0 family inet address 1.12.0.2/24 user@ABR# set ae0 unit 0 family mpls user@ABR# set ae1 unit 0 family inet address 1.23.0.1/24 user@ABR# set ae1 unit 0 family mpls
配置路由器用于将数据包散列到其目的地以实现负载平衡的 MPLS 标签。
[edit forwarding-options] user@ABR# set hash-key family mpls label-1 user@ABR# set hash-key family mpls label-2 user@ABR# set hash-key family mpls label-3 user@ABR# set enhanced-hash-key family mpls no-payload
设置路由器 ID 和自治系统编号。
[edit routing-options] user@ABR# set router-id 10.255.102.102 user@ABR# set autonomous-system 1
启用每个数据包负载平衡。
[edit routing-options] user@ABR# set forwarding-table export pplb
为所有接口配置 RSVP 协议。
[edit protocols] user@ABR# set protocols rsvp interface all
在路由器 P1 的所有接口上启用 MPLS 并指定 LSP。
[edit protocols] user@ABR# set mpls icmp-tunneling user@ABR# set mpls label-switched-path r2-r0 to 10.255.101.100 user@ABR# set mpls label-switched-path r2-r0 entropy-label user@ABR# set mpls label-switched-path r2-r4 to 10.255.101.200 user@ABR# set mpls label-switched-path r2-r4 entropy-label user@ABR# set mpls interface all
在内部路由器上配置 IBGP。
[edit protocols ] user@ABR# set bgp group ibgp type internal user@ABR# set bgp group ibgp local-address 10.255.102.102 user@ABR# set bgp group ibgp family inet labeled-unicast rib inet.3 user@ABR# set bgp group ibgp neighbor 10.255.101.100 export send-inet3-R4 user@ABR# set bgp group ibgp neighbor 10.255.101.200 export send-inet3-R0
在所有 ABR 接口上启用 OSPF 协议。
[edit protocols ] user@ABR# set ospf traffic-engineering user@ABR# set ospf area 0.0.0.0 interface lo0.0 passive user@ABR# set ospf area 0.0.0.0 interface ge-0/0/2.0 user@ABR# set ospf area 0.0.0.0 interface ge-0/0/0.0 user@ABR# set ospf area 0.0.0.0 interface ae0.0 user@ABR# set ospf area 0.0.0.0 interface fxp0.0 disable user@ABR# set ospf area 0.0.0.1 interface ge-0/0/3.0 user@ABR# set ospf area 0.0.0.1 interface ge-0/0/1.0 user@ABR# set ospf area 0.0.0.1 interface ae1.0
定义策略以指定具有熵标签功能的路由。
[edit policy-options ] user@ABR# set policy-statement pplb then load-balance per-packet user@ABR# set policy-statement send-inet3-R0 from route-filter 10.255.101.100/32 exact user@ABR# set policy-statement send-inet3-R0 then accept user@ABR# set policy-statement send-inet3-R4 from route-filter 10.255.101.200/32 exact user@ABR# set policy-statement send-inet3-R4 then accept
成果
从show interfaces配置模式，输入、 show protocolsshow routing-optionsshow forwarding options、、和show policy-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
[edit]
user@ABR# show interfaces
ge-0/0/0 {
gigether-options {
802.3ad ae0;
}
}
ge-0/0/1 {
gigether-options {
802.3ad ae1;
}
}
ge-0/0/2 {
gigether-options {
802.3ad ae0;
}
}
ge-0/0/3 {
gigether-options {
802.3ad ae1;
}
}
ae0 {
unit 0 {
family inet {
address 1.12.0.2/24;
}
family mpls;
}
}
ae1 {
unit 0 {
family inet {
address 1.23.0.1/24;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.102.102/32 {
primary;
}
}
}
}
[edit]
user@ABR# show protocols
rsvp {
interface all;
}
mpls {
icmp-tunneling;
label-switched-path r2-r0 {
to 10.255.101.100;
entropy-label;
}
label-switched-path r2-r4 {
to 10.255.101.200;
entropy-label;
}
interface all;
}
bgp {
group ibgp {
type internal;
local-address 10.255.102.102;
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
neighbor 10.255.101.100 {
export send-inet3-R4;
}
neighbor 10.255.101.200 {
export send-inet3-R0;
}
}
}
ospf {
traffic-engineering;
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface ge-0/0/2.0;
interface ge-0/0/0.0;
interface ae0.0;
interface fxp0.0 {
disable;
}
}
area 0.0.0.1 {
interface ge-0/0/3.0;
interface ge-0/0/1.0;
interface ae1.0;
}
}
[edit]
user@ABR# show routing-options
router-id 10.255.102.102;
autonomous-system 1;
forwarding-table {
export pplb;
}
[edit]
user@ABR# show forwarding-options
hash-key {
family mpls {
label-1;
label-2;
label-3;
}
}
enhanced-hash-key {
family mpls {
no-payload;
}
}
[edit]
user@ABR# show policy-options
policy-statement pplb {
then {
load-balance per-packet;
}
}
policy-statement send-inet3-R0 {
from {
route-filter 10.255.101.100/32 exact;
}
then accept;
}
policy-statement send-inet3-R4 {
from {
route-filter 10.255.101.200/32 exact;
}
then accept;
}
针对
确认配置是否正常工作。
验证是否正在从路由器 PE2 中播发熵标签功能
用途
验证从上游路由器 PE2 传出时，是否正在通告熵标签功能路径属性。
行动
在操作模式下，在路由器 show route 10.255.101.200 advertising-protocol bgp 10.255.102.102 PE2 上运行 命令。
user@PE2> show route 10.255.101.200 advertising-protocol bgp 10.255.102.102
inet.3: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
* 10.255.101.200/32 (1 entry, 1 announced)
BGP group ibgp type Internal
Route Label: 299920
Nexthop: Self
Flags: Nexthop Change
MED: 2
Localpref: 4294967294
AS path: [1] I
Entropy label capable
含义
输出显示，具有 10.255.101.200 IP 地址的主机 PE2 具有熵标签功能。主机正在将熵标签功能公布到其 BGP 邻居中。
验证路由器 ABR 是否接收熵标签广告
用途
验证路由器 ABR 在来自路由器 PE2 的入口处收到熵标签广告。
行动
在操作模式下，在 show route 10.255.101.200 receiving-protocol bgp 10.255.101.200 路由器 ABR 上运行 命令。
user@ABR> show route 10.255.101.200 receiving-protocol bgp 10.255.101.200
inet.0: 63 destinations, 63 routes (63 active, 0 holddown, 0 hidden)
inet.3: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
* 10.255.101.100/32 (1 entry, 1 announced)
Accepted
Route Label: 299920
Nexthop: 10.255.102.102
MED: 2
Localpref: 4294967294
AS path: I
Entropy label capable
VPN-l3vpn.inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden)
iso.0: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
mpls.0: 5 destinations, 5 routes (5 active, 0 holddown, 0 hidden)
bgp.l3vpn.0: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
inet6.0: 7 destinations, 7 routes (7 active, 0 holddown, 0 hidden)
VPN-l3vpn.inet6.0: 4 destinations, 4 routes (4 active, 0 holddown, 0 hidden)
user@PE1> show route protocol bgp detail
inet.0: 64 destinations, 64 routes (64 active, 0 holddown, 0 hidden)
inet.3: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
10.255.101.200/32 (1 entry, 1 announced)
*BGP Preference: 170/1
Next hop type: Indirect, Next hop index: 0
Address: 0xa533c10
Next-hop reference count: 2
Source: 10.255.102.102
Next hop type: Router, Next hop index: 0
Next hop: 1.1.0.2 via ge-0/0/1.0, selected
Label-switched-path r0-r2
Label operation: Push 299904, Push 300096(top)
Label TTL action: prop-ttl, prop-ttl(top)
Load balance label: Label 299904: Entropy label; Label 300096: None;
Label element ptr: 0xa5335a0
Label parent element ptr: 0xa5338a0
Label element references: 2
Label element child references: 1
Label element lsp id: 0
Session Id: 0x0
Protocol next hop: 10.255.102.102
Label operation: Push 299904
Label TTL action: prop-ttl
Load balance label: Label 299904: Entropy label;
Indirect next hop: 0xaa18540 - INH Session ID: 0x0
State: <Active Int Ext>
Local AS: 1 Peer AS: 1
Age: 12:39 Metric: 2 Metric2: 2
Validation State: unverified
Task: BGP_1.10.255.102.102
Announcement bits (2): 0-Resolve tree 1 3-Resolve_IGP_FRR task
AS path: I
Accepted
Route Label: 299904
Localpref: 4294967294
Router ID: 10.255.102.102
VPN-l3vpn.inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden) 含义
路由器 ABR 从其 BGP 邻居 PE2 接收熵标签功能通告。
验证是否设置了熵标签标志
用途
验证是否为入口处的标签元素设置了熵标签标志。
行动
在操作模式下，在路由器 show route protocol bgp detail PE1 上运行 命令。
user@PE1> show route protocol bgp detail
inet.0: 64 destinations, 64 routes (64 active, 0 holddown, 0 hidden)
inet.3: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
10.255.101.200/32 (1 entry, 1 announced)
*BGP Preference: 170/1
Next hop type: Indirect, Next hop index: 0
Address: 0xa533c10
Next-hop reference count: 2
Source: 10.255.102.102
Next hop type: Router, Next hop index: 0
Next hop: 1.1.0.2 via ge-0/0/1.0, selected
Label-switched-path r0-r2
Label operation: Push 299904, Push 300096(top)
Label TTL action: prop-ttl, prop-ttl(top)
Load balance label: Label 299904: Entropy label; Label 300096: None;
Label element ptr: 0xa5335a0
Label parent element ptr: 0xa5338a0
Label element references: 2
Label element child references: 1
Label element lsp id: 0
Session Id: 0x0
Protocol next hop: 10.255.102.102
Label operation: Push 299904
Label TTL action: prop-ttl
Load balance label: Label 299904: Entropy label;
Indirect next hop: 0xaa18540 - INH Session ID: 0x0
State: <Active Int Ext>
Local AS: 1 Peer AS: 1
Age: 12:39 Metric: 2 Metric2: 2
Validation State: unverified
Task: BGP_1.10.255.102.102
Announcement bits (2): 0-Resolve tree 1 3-Resolve_IGP_FRR task
AS path: I
Accepted
Route Label: 299904
Localpref: 4294967294
Router ID: 10.255.102.102
VPN-l3vpn.inet.0: 8 destinations, 8 routes (8 active, 0 holddown, 0 hidden) 含义
路由器 PE1 上启用了熵标签。输出显示，熵标签正用于标记为单播的 BGP，用于实现端到端负载平衡。
用于 Inet、Inet6 或标记为单播的 BGP 前缀无关融合的用例
在路由器故障实例中，BGP 网络可能需要从几秒到几分钟才能恢复，具体取决于网络或路由器性能大小等参数。在路由器上启用 BGP 前缀无关融合（PIC）功能时，BGP 安装到数据包转发引擎第二个最佳路径，以及到目标的计算最佳路径。当出站路由器在网络中出现故障时，路由器将使用此备份路径，从而显著缩短中断时间。如果出口路由器发生故障，您可以启用此功能以减少网络停机时间。
当到达网络中的出口路由器时，IGP 检测到这种中断，链路状态将在整个网络中传播此信息，并通告该前缀 BGP 下一跳跃是否不可达。BGP reevaluates 备用路径，如果有备用路径，则将此备用的下一跳跃重新安装到数据包转发引擎中。这种类型的出口故障通常同时影响多个前缀，BGP 必须一次更新一个以上的前缀。在入口路由器上，IGP 完成最短路径优先（SPF）并更新下一个跳跃。然后 Junos OS 决定了变为不可访问的前缀，并向协议发出了需要更新的信号。BGP 获取通知，并更新当前无效的每个前缀的下一跳。此过程可能会影响连接，并可能需要几分钟才能从中断中恢复。BGP PIC 可减少这种停机时间，因为备份路径已安装在数据包转发引擎中。
从 Junos OS 版本15.1 开始，第3层 VPN 路由器最初支持的 BGP PIC 功能将扩展到全局表中的多个路由 BGP，例如 inet 和 inet6 单播，以及 inet 和 inet6 标记为单路广播。在已启用 BGP PIC 的路由器上，Junos OS为路由引擎上的间接下一跳跃安装备份路径，同时向路由引擎和路由器 数据包转发引擎IGP。当 IGP 丢失一个或多个路由的前缀时，将在更新路由表之前使用一条消息向路由引擎发出信号。路由引擎表示间接下一跃点发生故障的数据包转发引擎，并且必须使用备份路径重新路由流量。路由到受影响的目标前缀将继续使用备份路径，即使在 BGP 开始重新计算 BGP 前缀的新下一跃点之前也是如此。路由器使用此备份路径减少流量损失，直到通过 BGP 的全球融合解决。
在到达此时间后，中断可访问性中断的时间实际上取决于最近的路由器的故障检测时间和 IGP 融合时间。一旦本地路由器检测到中断，启用了不带 BGP PIC 功能的路由融合很大程度上取决于受影响的前缀数量和路由器的性能，因为重新计算每个受影响的前缀。但是，在启用 BGP PIC 功能后，即使 BGP 重新计算受影响的前缀的最佳路径，路由引擎也会将数据平面引向备用下一个最佳路径。因此流量损失最小。即使正在转发流量，也会计算新路由，这些新路由将被推送到数据平面。因此，受影响的 BGP 前缀数量并不会影响从时间中断到 BGP 信号丢失可达性的时间点所花费的时间。
另请参阅
为 Inet 配置与 BGP 前缀无关的融合
在启用 BGP 前缀独立融合（PIC）的路由器上，Junos OS 将为路由引擎上的间接下一跳跃安装备份路径，同时为数据包转发引擎和 IGP 提供此路由。当 IGP 丢失一个或多个路由的前缀时，将在更新路由表之前使用一条消息向路由引擎发出信号。路由引擎表示间接下一跃点发生故障的数据包转发引擎，并且必须使用备份路径重新路由流量。路由到受影响的目标前缀将继续使用备份路径，即使在 BGP 开始重新计算 BGP 前缀的新下一跃点之前也是如此。路由器使用此备份路径减少流量损失，直到通过 BGP 的全球融合解决。最初支持第3层 VPN 路由器的 BGP PIC 功能被扩展到与全局表中的多个路由（如 inet 和 inet6 单播）、inet 和 inet6 标记为单路广播的 BGP。
开始之前：
配置设备接口。
配置 OSPF 或任何其他 IGP 协议。
配置 MPLS 和 LDP。
配置 BGP。
注：
只有具有 MPC 接口的路由器支持 BGP PIC 功能。
最佳做法：
在具有模块化端口集中器（Mpc）的路由器上，启用增强型 IP 网络服务，如下所示：
[edit chassis network-services] user@host# set enhanced-ip
要为 inet 配置 BGP PIC：
另请参阅
示例：为 Inet 配置与 BGP 前缀无关的融合
此示例演示如何为 inet 配置 BGP PIC。在路由器故障实例中，BGP 网络可能需要从几秒到几分钟才能恢复，具体取决于网络或路由器性能大小等参数。在路由器上启用 BGP 前缀无关融合（PIC）功能时，在全局表中具有多个路由的 BGP，如 inet 和 inet6 单播，以及 inet 和 inet6 标记为单播，则会安装到数据包转发引擎中的第二个最佳路径添加到目标的计算最佳路径。当出站路由器在网络中出现故障时，路由器将使用此备份路径，从而显著缩短中断时间。
要求
配置此示例之前，不需要在设备初始化之外进行特殊配置。
此示例使用以下硬件和软件组件：
一个带有 Mpc 的 MX 系列路由器，用于配置 BGP PIC 功能
七个路由器，可用作 M Series、MX 系列、T Series 或 PTX 系列路由器的组合
在设备上配置 BGP PIC Junos OS 版本15.1 或更高版本
概述
从 Junos OS 版本15.1 开始，BGP PIC 是第3层 VPN 路由器最初支持的，其扩展 BGP 到了全局表中的多个路由，如 inet 和 inet6 单播，以及 inet 和 inet6 标记为单路广播。除了计算目标的最佳路径外，BGP 安装到第二个最佳路径数据包转发引擎。当 IGP 失去前缀的可达性时，路由器将使用此备份路径来降低流量损失，直到通过 BGP 的全局融合得以解决，从而缩短停机时间。
注：
只有具有 Mpc 的路由器才支持 BGP PIC 功能。
拓扑
此示例显示了三个客户边缘（CE）路由器、设备 CE0、CE1 和 CE2。路由器 PE0、PE1 和 PE2 是提供商边缘（PE）路由器。路由器 P0 和 P1 是提供商核心路由器。BGP PIC 在路由器 PE0 上配置。对于测试，地址192.168.1.5 将作为设备 CE1 上的第二个回传接口地址添加。该地址将通告给路由器 PE1 和 PE2，并由内部 BGP （IBGP）中继到路由器 PE0。在路由器 PE0 上，192.168.1.5 网络有两条途径。这些是主要路径和备份路径。 图 13 显示了示例网络。
图 13： 为 Inet 配置 BGP PIC
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后进入从配置模式提交。
路由器 PE0
set chassis network-services enhanced-ip set interfaces ge-0/0/0 unit 0 description PE0->P0 set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.5/24 set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8::1/32 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 unit 0 description PE0->P1 set interfaces ge-0/0/1 unit 0 family inet address 10.0.0.1/24 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family inet6 address 2001:db8::2/32 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 192.168.0.1/32 set interfaces ge-0/0/2 unit 0 description PE0->CE0 set interfaces ge-0/0/2 unit 0 family inet address 172.16.0.1/30 set interfaces ge-0/0/2 unit 0 family inet6 address 2001:db8::10/32 set interfaces ge-0/0/2 unit 0 family mpls set protocols mpls ipv6-tunneling set protocols mpls interface all set protocols mpls interface fxp0.0 disable set protocols bgp group ibgp type internal set protocols bgp group ibgp local-address 192.168.0.1 set protocols bgp group ibgp family inet labeled-unicast per-prefix-label set protocols bgp group ibgp family inet6 labeled-unicast explicit-null set protocols bgp group ibgp export nhself set protocols bgp group ibgp neighbor 192.168.0.4 description PE1 set protocols bgp group ibgp neighbor 192.168.0.5 description PE2 set protocols bgp group ebgp type external set protocols bgp group ebgp local address 192.168.0.1 set protocols bgp group ebgp family inet labeled-unicast set protocols bgp group ebgp family inet6 labeled-unicast set protocols bgp group ebgp peer-as 64497 set protocols bgp group ebgp neighbor 172.16.0.2 description CE0 set protocols ospf area 0.0.0.0 interface all set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 metric 1000 set protocols ospf3 area 0.0.0.0 interface all set protocols ospf3 area 0.0.0.0 interface fxp0.0 disable set protocols ospf3 area 0.0.0.0 interface lo0.0 passive set protocols ospf3 area 0.0.0.0 interface ge-0/0/1.0 metric 1000 set protocols ldp track-igp-metric set protocols ldp interface all set protocols ldp interface fxp0.0 disable set policy-options policy-statement lb then load-balance per-packet set policy-options policy-statement nhself then next-hop self set routing-options protect core set routing-options forwarding-table export lb set routing-options router-id 192.168.0.1 set routing-options autonomous-system 64496
路由器 P0
set chassis network-services enhanced-ip set interfaces ge-0/0/0 unit 0 description P0->PE0 set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.6/24 set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8::3/32 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 unit 0 description P0->PE1 set interfaces ge-0/0/1 unit 0 family inet address 10.0.0.9/24 set interfaces ge-0/0/1 unit 0 family inet6 address 2001:db8::4/32 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 192.168.0.2/32 set protocols ospf area 0.0.0.0 interface all set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols bgp group ibgp type internal set protocols bgp group ibgp local address 192.168.0.1 set protocols bgp group ibgp neighbor 192.168.0.4 description PE1 set protocols bgp group ibgp neighbor 192.168.0.5 description PE2 set routing-options router-id 192.168.0.2 set routing-options autonomous-system 64496
路由器 P1
set chassis network-services enhanced-ip set interfaces ge-0/0/1 unit 0 description P1->PE0 set interfaces ge-0/0/1 unit 0 family inet address 10.0.0.2/24 set interfaces ge-0/0/1 unit 0 family inet6 address 2001:db8::5/32 set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/0 unit 0 description P1->PE2 set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.13/24 set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8::6/32 set interfaces ge-0/0/0 unit 0 family mpls set interfaces lo0 unit 0 family inet address 192.168.0.3/32 set protocols ospf area 0.0.0.0 interface all set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols bgp group ibgp type internal set protocols bgp group ibgp local address 192.168.0.3 set protocols bgp group ibgp neighbor 192.168.0.1 description PE0 set protocols bgp group ibgp neighbor 192.168.0.5 description PE2 set routing-options router-id 192.168.0.3 set routing-options autonomous-system 64496
路由器 PE1
set chassis network-services enhanced-ip set interfaces ge-0/0/0 unit 0 description PE1->P0 set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.10/24 set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8::7/32 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/1 unit 0 description PE1->CE1 set interfaces ge-0/0/1 unit 0 family inet address 172.16.1.1/30 set interfaces ge-0/0/1 unit 0 family inet6 address 2001:db8::12/32 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 192.168.0.4/32 set protocols bgp group ibgp type internal set protocols bgp group ibgp local address 192.168.0.4 set protocols bgp group ibgp family inet labeled-unicast per-prefix-label set protocols bgp group ibgp family inet6 labeled-unicast explicit-null set protocols bgp group ibgp export nhself set protocols bgp group ibgp neighbor 192.168.0.1 description PE0 set protocols bgp group ibgp neighbor 192.168.0.5 description PE2 set protocols bgp group ebgp type external set protocols bgp group ebgp local address 192.168.0.4 set protocols bgp group ebgp peer-as 64497 set protocols bgp group ebgp neighbor 172.16.1.2 description CE1 set protocols ospf area 0.0.0.0 interface all set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 metric 1000 set protocols ospf3 area 0.0.0.0 interface all set protocols ospf3 area 0.0.0.0 interface fxp0.0 disable set protocols ospf3 area 0.0.0.0 interface lo0.0 passive set protocols ospf3 area 0.0.0.0 interface ge-0/0/0.0 metric 1000 set protocols ldp track-igp-metric set protocols ldp interface all set protocols ldp interface fxp0.0 disable set policy-options policy-statement PE1-v6-nh_CE1 from family inet6 set policy-options policy-statement PE1-v6-nh_CE1 then next-hop 2001:DB8::13 set policy-options policy-statement nhself then next-hop self set routing-options router-id 192.168.0.4 set routing-options autonomous-system 64496 set routing-options static route 192.168.1.2 next-hop 172.16.1.2
路由器 PE2
set chassis network-services enhanced-ip set interfaces ge-0/0/0 unit 0 description PE2->P1 set interfaces ge-0/0/0 unit 0 family inet address 10.0.0.14/24 set interfaces ge-0/0/0 unit 0 family inet6 address 2001:db8::8/32 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/0 unit 0 family iso set interfaces ge-0/0/1 unit 0 description PE2->CE2 set interfaces ge-0/0/1 unit 0 family inet address 172.16.2.1/30 set interfaces ge-0/0/1 unit 0 family inet6 address 2001:db8::14/32 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 192.168.0.5/32 set protocols mpls ipv6-tunneling set protocols mpls interface all set protocols mpls interface fxp0.0 disable set protocols bgp group ibgp type internal set protocols bgp group ibgp local address 192.168.0.5 set protocols bgp group ibgp family inet labeled-unicast per-prefix-label set protocols bgp group ibgp family inet6 labeled-unicast explicit-null set protocols bgp group ibgp export nhself set protocols bgp group ibgp neighbor 192.168.0.4 description PE1 set protocols bgp group ibgp neighbor 192.168.0.1 description PE0 set protocols bgp group ebgp type external set protocols bgp group ebgp local address 192.168.0.5 set protocols bgp group ebgp peer-as 64497 set protocols bgp group ebgp family inet labeled-unicast set protocols bgp group ebgp family inet6 labeled-unicast set protocols bgp group ebgp neighbor 172.16.2.2 description CE2 set protocols ospf area 0.0.0.0 interface all set protocols ospf area 0.0.0.0 interface fxp0.0 disable set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 metric 1000 set protocols ospf3 area 0.0.0.0 interface all set protocols ospf3 area 0.0.0.0 interface fxp0.0 disable set protocols ospf3 area 0.0.0.0 interface lo0.0 passive set protocols ospf3 area 0.0.0.0 interface ge-0/0/0.0 metric 1000 set protocols ldp track-igp-metric set protocols ldp interface all set protocols ldp interface fxp0.0 disable set policy-options policy-statement nhself then next-hop self set routing-options router-id 192.168.0.5 set routing-options autonomous-system 64496 set routing-options static route 192.168.1.3 next-hop 172.16.2.2
设备 CE0
set chassis network-services enhanced-ip set interfaces ge-0/0/2 unit 0 description CE0->PE0 set interfaces ge-0/0/2 unit 0 family inet address 172.16.0.2/30 set interfaces ge-0/0/2 unit 0 family inet6 address 2001:db8::11/32 set interfaces lo0 unit 0 family inet address 192.168.1.1/32 set protocols mpls interface all set protocols bgp group ebgp type external set protocols bgp group ebgp peer-as 64496 set protocols bgp group ebgp family inet labeled-unicast set protocols bgp group ebgp family inet6 labeled-unicast set protocols bgp group ebgp neighbor 172.16.0.1 description PE0 set protocols bgp group ebgp local-address 192.168.1.1 set routing-options autonomous-system 64497 set routing-options router-id 192.168.1.1
设备 CE1
set chassis network-services enhanced-ip set interfaces ge-0/0/2 unit 0 description CE1->PE1 set interfaces ge-0/0/2 unit 0 family inet address 172.16.1.2/30 set interfaces ge-0/0/2 unit 0 family inet6 address 2001:db8::13/32 set interfaces ge-0/0/2 unit 0 family mpls set interfaces lo0 unit 0 family inet address 192.168.1.2/32 set interfaces lo0 unit 0 family inet address 192.168.1.5/24 set protocols mpls interface all set protocols bgp group ebgp type external set protocols bgp group ebgp peer-as 64496 set protocols bgp group ebgp family inet labeled-unicast set protocols bgp group ebgp family inet6 labeled-unicast set protocols bgp group ebgp export send-direct set protocols bgp group ebgp neighbor 172.16.1.1 description PE1 set policy-options policy statement send-direct from protocol direct then accept set routing-options autonomous-system 64497 set routing-options router-id 192.168.1.2
设备 CE2
set chassis network-services enhanced-ip set interfaces ge-0/0/2 unit 0 description CE2->PE2 set interfaces ge-0/0/2 unit 0 family inet address 172.16.2.2/30 set interfaces ge-0/0/2 unit 0 family inet6 address 2001:db8::15/32 set interfaces ge-0/0/2 unit 0 family mpls set interfaces lo0 unit 0 family inet address 192.168.1.3/32 set protocols mpls interface all set protocols bgp group ebgp type external set protocols bgp group ebgp peer-as 64496 set protocols bgp group ebgp family inet labeled-unicast set protocols bgp group ebgp family inet6 labeled-unicast set protocols bgp group ebgp export send-direct set protocols bgp group ebgp neighbor 172.16.2.1 description PE2 set policy-options policy statement send-direct from protocol direct then accept set routing-options autonomous-system 64497 set routing-options router-id 192.168.1.3
配置设备 PE0
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置设备 PE0：
在具有模块化端口集中器（Mpc）的路由器上，启用增强型 IP 网络服务。
[edit chassis] usr@PE0# set network-services enhanced-ip
配置设备接口。
[edit interfaces] user@PE0# set ge-0/0/0 unit 0 description PE0->P0 user@PE0# set ge-0/0/0 unit 0 family inet address 10.0.0.5/24 user@PE0# set ge-0/0/0 unit 0 family iso user@PE0# set ge-0/0/0 unit 0 family inet6 address 2001:db8::1/32 user@PE0# set ge-0/0/0 unit 0 family mpls user@PE0# set ge-0/0/1 unit 0 description PE0->P1 user@PE0# set ge-0/0/1 unit 0 family inet address 10.0.0.1/24 user@PE0# set ge-0/0/1 unit 0 family iso user@PE0# set ge-0/0/1 unit 0 family inet6 address 2001:db8::2/32 user@PE0# set ge-0/0/1 unit 0 family mpls user@PE0# set ge-0/0/2 unit 0 description PE0->CE0 user@PE0# set ge-0/0/2 unit 0 family inet address 172.16.0.1/30 user@PE0# set ge-0/0/2 unit 0 family inet6 address 2001:db8::10/32 user@PE0# set ge-0/0/2 unit 0 family mpls
配置回传接口。
[edit interfaces] user@PE0# set lo0 unit 0 family inet address 192.168.0.1/32
在除管理接口之外的所有接口上配置 MPLS 和 LDP。
[edit protocols] user@PE0# set mpls ipv6-tunneling user@PE0# set mpls interface all user@PE0# set mpls interface fxp0.0 disable user@PE0# set ldp track-igp-metric user@PE0# set ldp interface all user@PE0# set ldp interface fxp0.0 disable
在面向核心的接口上配置 IGP。
[edit protocols] user@PE0# set ospf area 0.0.0.0 interface all user@PE0# set ospf area 0.0.0.0 interface fxp0.0 disable user@PE0# set ospf area 0.0.0.0 interface lo0.0 passive user@PE0# set ospf area 0.0.0.0 interface ge-0/0/1.0 metric 1000 user@PE0# set ospf3 area 0.0.0.0 interface all user@PE0# set ospf3 area 0.0.0.0 interface fxp0.0 disable user@PE0# set ospf3 area 0.0.0.0 interface lo0.0 passive user@PE0# set ospf3 area 0.0.0.0 interface ge-0/0/1.0 metric 1000
配置与其他 PE 设备的 IBGP 连接。
[edit protocols] user@PE0# set bgp group ibgp type internal user@PE0# set bgp group ibgp local-address 192.168.0.1 user@PE0# set bgp group ibgp family inet labeled-unicast per-prefix-label user@PE0# set bgp group ibgp family inet6 labeled-unicast explicit-null user@PE0# set bgp group ibgp export nhself user@PE0# set bgp group ibgp neighbor 192.168.0.4 description PE1 user@PE0# set bgp group ibgp neighbor 192.168.0.5 description PE2
配置与客户设备的 EBGP 连接。
[edit protocols] user@PE0# set bgp group ebgp type external user@PE0# set bgp group ebgp local address 192.168.0.1 user@PE0# set bgp group ebgp family inet labeled-unicast user@PE0# set bgp group ebgp family inet6 labeled-unicast user@PE0# set bgp group ebgp peer-as 64497 user@PE0# set bgp group ebgp neighbor 172.16.0.2 description CE0
配置负载平衡策略。
[edit policy-options] user@PE0# set policy-statement lb then load-balance per-packet
配置下一跳自助策略。
[edit policy-options] user@PE0# set policy-statement nhself then next-hop self
启用 BGP PIC 边缘功能。
[edit routing-options] user@PE0# set protect core
应用负载平衡策略。
[edit routing-options] user@PE0# set forwarding-table export lb
分配路由器 ID 和自治系统（AS）编号。
[edit routing-options] user@PE0# set router-id 192.168.0.2 user@PE0# set autonomous-system 64496
成果
从show chassis配置模式，输入、 show interfacesshow protocolsshow policy-options、、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
[edit] user@PE0# show chassis network-services enhanced-ip;
[edit]
user@PE0# show interfaces
ge-0/0/0 {
unit 0 {
description PE0->P0;
family inet {
address 10.0.0.5/24;
}
family iso;
family inet6 {
address 2001:db8::1/32;
}
family mpls;
}
}
ge-0/0/1 {
unit 0 {
description PE0->P1;
family inet {
address 10.0.0.1/24;
}
family iso;
family inet6 {
address 2001:db8::2/32;
}
family mpls;
}
}
ge-0/0/2 {
unit 0 {
description PE0->CE0;
family inet {
address 172.16.0.1/30;
}
family inet6 {
address 2001:db8::10/32;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 192.168.0.1/32;
}
}
}
[edit]
user@PE0# show protocols
mpls {
ipv6-tunneling;
interface all;
interface fxp0.0 {
disable;
}
}
bgp {
group ibgp {
type internal;
local-address 192.168.0.1;
family inet {
labeled-unicast {
per-prefix-label;
}
}
family inet6 {
labeled-unicast {
explicit-null;
}
}
export nhself;
neighbor 192.168.0.4 {
description PE1;
}
neighbor 192.168.0.5 {
description PE2;
}
}
group ebgp {
type external;
local-address 192.168.0.1;
family inet {
labeled-unicast;
}
family inet6 {
labeled-unicast;
}
peer-as 64497;
neighbor 172.16.0.2 {
description CE0;
}
}
}
ospf {
area 0.0.0.0 {
interface all;
interface lo0.0 {
passive;
}
interface ge-0/0/1.0 {
metric 1000;
}
interface fxp0.0 {
disable;
}
}
}
ospf3 {
area 0.0.0.0 {
interface all;
interface lo0.0 {
passive;
}
interface ge-0/0/1.0 {
metric 1000;
}
interface fxp0.0 {
disable;
}
}
}
ldp {
track-igp-metric;
interface all;
interface fxp0.0 {
disable;
}
}
[edit]
user@PE1# show policy-options
policy-statement lb {
then {
load-balance per-packet;
}
}
policy-statement nhself {
then {
next-hop self;
}
}
[edit]
user@PE0# show routing-options
protect core;
router-id 192.168.0.1;
autonomous system 64496
forwarding-table {
export lb;
}
针对
确认配置是否正常工作。
显示广泛的路由信息
用途
确认 BGP PIC 边缘是否正常工作。
行动
从设备 PE0 中运行show route extensive命令。
user@PE0> show route 192.168.1.5 extensive
inet.0: 236941 destinations, 630411 routes (236940 active, 0 holddown, 1 hidden)
20.1.1.1/32 (3 entries, 2 announced)
State: <CalcForwarding>
TSI:
KRT in-kernel 192.168.1.5/24 -> {indirect(1048574), indirect(1048575)}
@BGP Preference: 170/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xafd09d0
Next-hop reference count: 236886
Source: 192.168.0.4
Next hop type: Router, Next hop index: 623
Next hop: 10.0.0.2 via ge-0/0/1.0, selected
Session Id: 0x140
Protocol next hop: 192.168.0.4
Indirect next hop: 0xab3b980 1048574 INH Session ID: 0x144
State: <Active Int Ext ProtectionPath ProtectionCand>
Local AS: 64496 Peer AS: 64496
Age: 1:11 Metric2: 2
Validation State: unverified
Task: BGP_100.192.168.0.5
Announcement bits (1): 6-Resolve tree 2
AS path: 64497 I
Accepted MultipathUnequal
Localpref: 100
Router ID: 192.168.0.5
Indirect next hops: 1
Protocol next hop: 192.168.0.5 Metric: 2
Indirect next hop: 0xab3b980 1048574 INH Session ID: 0x144
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.0.0.2 via ge-0/0/1.0
Session Id: 0x140
192.168.0.5/32 Originating RIB: inet.0
Metric: 2 Node path count: 1
Forwarding nexthops: 1
Nexthop: 10.0.0.2 via ge-0/0/1.0
BGP Preference: 170/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xafd0970
Next-hop reference count: 196735
Source: 192.168.0.4
Next hop type: Router, Next hop index: 624
Next hop: 10.0.0.6 via ge-0/0/0.0, selected
Session Id: 0x141
Protocol next hop: 192.168.0.4
Indirect next hop: 0xab3c240 1048575 INH Session ID: 0x145
State: <NotBest Int Ext ProtectionCand>
Inactive reason: Not Best in its group - IGP metric
Local AS: 100 Peer AS: 100
Age: 1:05 Metric2: 1001
Validation State: unverified
Task: BGP_100.192.168.0.4
AS path: 200 400 I
Accepted
Localpref: 100
Router ID: 192.168.0.4
Indirect next hops: 1
Protocol next hop: 192.168.0.4 Metric: 1001
Indirect next hop: 0xab3c240 1048575 INH Session ID: 0x145
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.0.0.6 via ge-0/0/0.0
Session Id: 0x141
192.168.0.4/32 Originating RIB: inet.0
Metric: 1001 Node path count: 1
Forwarding nexthops: 1
Nexthop: 10.0.0.6 via ge-0/0/0.0
#Multipath Preference: 255
Next hop type: Indirect, Next hop index: 0
Address: 0xd330f90
Next-hop reference count: 304062
Next hop type: Router, Next hop index: 623
Next hop: 10.0.0.6 via ge-0/0/0.0, selected
Session Id: 0x140
Next hop type: Router, Next hop index: 624
Next hop: 10.0.0.2 via ge-0/0/1.0
Session Id: 0x141
Protocol next hop: 192.168.0.4
Indirect next hop: 0xab3b980 1048574 INH Session ID: 0x144 Weight 0x1
Protocol next hop: 192.168.0.5
Indirect next hop: 0xab3c240 1048575 INH Session ID: 0x145 Weight 0x4000
State: <ForwardinOnly Int Ext>
Inactive reason: Forwarding use only
Local AS: 64496
Age: 1:05 Metric2: 2
Validation State: unverified
Task: RT
Announcement bits (1): 0-KRT
AS path: 64497 I
含义
链路故障发生时，Junos OS 使用weight下一个跳跃和值来选择备份路径。下一中继站重量具有以下值之一：
0x1 指示带有活动下一个跃点的主路径。
0x4000 使用被动下一跳跃指示备份路径。
显示转发表
用途
使用show route forwarding-table命令检查转发和内核路由表状态。
行动
从设备 PE0 中运行show route forwarding-table destination 192.168.1.5 extensive命令。
user@PE0> show route forwarding-table destination 192.168.1.5 extensive
Routing table: default.inet [Index 0]
Internet:
Destination: 192.168.1.5/24
Route type: user
Route reference: 0 Route interface-index: 0
Multicast RPF nh index: 0
Flags: sent to PFE
Next-hop type: unilist Index: 1048576 Reference: 7401
Next-hop type: indirect Index: 1048574 Reference: 2 Weight: 0x1
Nexthop: 10.0.0.6
Next-hop type: unicast Index: 623 Reference: 8
Next-hop interface: ge-0/0/0.0 Weight: 0x1
Next-hop type: indirect Index: 1048575 Reference: 2 Weight: 0x4000
Nexthop: 10.0.0.2
Next-hop type: unicast Index: 624 Reference: 8
Next-hop interface: ge-0/0/1.0 Weight: 0x4000 含义
链路故障发生时，Junos OS 使用weight下一个跳跃和值来选择备份路径。下一中继站重量具有以下值之一：
0x1 指示带有活动下一个跃点的主路径。
0x4000 使用被动下一跳跃指示备份路径。
使用标记为单播概述的 BGP BGP PIC 边缘
本节介绍使用标记为单播BGP传输协议BGP PIC 边缘的优势和概述。
使用标记为单播的 BGP BGP PIC 边缘的优势
此功能具有以下优势：
在多域网络中发生边框（ABR 和 ASBR）节点故障时提供信息流保护。
提供更快的网络连接恢复，并在主路径不可用时减少流量损失。
BGP 与前缀无关的融合的工作原理是什么？
BGP 前缀独立融合（PIC）改善了网络节点故障的 BGP 融合。BGP PIC 为路由引擎上的间接下一跳跃创建和存储主要和备份路径，同时还为数据包转发引擎提供了间接的下一跳跃路由信息。发生网络节点故障时，路由引擎会发出数据包转发引擎信号，指示某个间接下一跃点发生故障，该流量将重新路由为预先计算的等成本或备份路径，而不会修改 BGP 前缀。通过使用备份路径减少信息流丢失情况，直至全球融合到 BGP 得到解决，然后再将信息流路由到目标前缀。
BGP 融合适用于核心和边缘网络节点故障。在 BGP PIC 核心的情况下，对转发链的调整是由于节点或核心链路故障导致的。在 BGP PIC 边缘的情况下，对转发链的调整是由于边缘节点或边缘链路故障而产生的。
BGP PIC 边缘使用BGP单播作为传输协议
使用标记为单播传输协议的 BGP BGP PIC 边缘有助于在多域网络中发生边界节点（ABR 和 ASBR）故障时保护和重新路由流量。多域网络通常用于城域以太网聚合和移动回传网络设计中。
瞻博网络 MX 系列、EX 系列和 PTX 系列设备上，BGP PIC Edge 支持第 3 层服务，BGP 标记为单播作为传输协议。此外，在 瞻博网络 MX 系列、EX9204、EX9208、EX9214、EX9251 和 EX9253 设备上，BGP PIC Edge 支持第 2 层电路、第 2 层 VPN 和 VPLS （BGP VPLS、LDP VPLS 和 FEC 129 VPLS） 服务，BGP 标记为单播作为传输协议。这些BGP服务是多路径（从多个 PES 学习）并通过标记为 BGP 的单播路由解析，这可以是其他 AB 学习的多路径。BGP PIC 边缘支持的传输协议包括 RSVP、LDP、OSPF 和 ISIS。从 Junos OS 版 20.2R1 开始，MX 系列、EX9204、EX9208、EX9214、EX9251 和 EX9253 设备支持用于 2 层电路、第 2 层 VPN 和 VPLS （BGP VPLS、LDP VPLS 和 FEC 129 VPLS） 服务的 BGP PIC 边缘保护，标记为 BGP 作为传输协议。
在 瞻博网络 MX 系列、EX 系列和 PTX 系列设备上，BGP PIC 边缘保护（标记为 BGP 单播，传输受以下服务支持：
Ipv4 上的 IPv4 服务标记为单播的 BGP
IPv6 BGP 通过 IPv4 标记为单播服务 BGP 标记为单播
Ipv4 第3层 VPN 服务（IPv4） BGP 标记为单播
IPv4 的 IPv6 3 层 VPN 服务，标记为单播的 BGP
在 瞻博网络 MX 系列和 EX 系列设备上，BGP PIC 边缘保护（BGP 标记为单播，因为以下服务支持传输：
IPv4 上的第 2 层电路BGP标记为单播
IPv4 上的 2 层 VPN 服务BGP标签单播
IPv4 上的 VPLS（BGP VPLS、LDP VPLS 和 FEC 129 VPLS）服务BGP单播
使用标记BGP单播BGP PIC 边缘配置第 2 层服务
MX 系列、EX9204、EX9208、EX9214、EX9251 和 EX9253 设备支持 BGP PIC 边缘保护，用于第 2 层电路、第 2 层 VPN 和 VPLS （BGP VPLS、LDP VPLS 和 FEC 129 VPLS） 服务，BGP 标记为传输协议单播。BGP PIC 边缘使用BGP单播传输协议，有助于保护多域网络中边界节点（ABR 和 ASBR）上的流量故障。多域网络通常用于城域聚合和移动回传网络设计中。
实现 PIC 边缘BGP的先决条件是使用扩展的下一跃点层次结构数据包转发引擎 （PFE） 进行编程。
要为标记单播家族BGP扩展的下一跳跃层次结构，需要在 [ ] 层次结构级别配置以下 CLI edit protocols 配置语句：
[edit protocols] user@host#set bgp group group-name family inet labeled-unicast nexthop-resolution preserve-nexthop-hierarchy;
要启用BGP PIC MPLS下一个hops，您需要在 [ ] 层次结构级别CLI以下配置 edit routing-options 配置语句：
[edit routing-options] user@host#set rib routing-table-name protect core;
要启用第 2 层服务的快速融合，您需要在 [ ] 层次结构级别CLI以下组 edit protocols 配置语句：
对于 2 层电路和 LDP VPLS：
[edit protocols] user@host#set l2circuit resolution preserve-nexthop-heirarchy;
对于 2 层 VPN、BGP VPLS 和 FEC129：
[edit protocols] user@host#set l2vpn resolution preserve-nexthop-heirarchy;
示例：保护运行 BGP 标记为单播的第3层 VPN 上的 IPv4 流量
此示例展示如何配置标记BGP播的前缀无关融合 （PIC） 边缘，以及如何通过第 3 层 VPN 保护 IPv4 流量。将来自 CE 路由器的 IPv4 流量发送到 PE 路由器时，会通过第3层 VPN 路由 IPv4 流量，其中 BGP 标记为单路广播，并将其配置为传输协议。
要求
此示例使用以下硬件和软件组件：
MX 系列路由器。
Junos OS Release R1 或更高版本运行在所有设备上。
概述
以下拓扑提供 ABR 和 ASBR 保护，只要主路径不可用，就将信息流切换到备份路径。
拓扑
图 14说明了运行 BGP 标记为单播的第3层 VPN 作为域间传输协议。
图 14： 第3层 VPN over 使用 LDP 传输协议标记为单播的 BGP
下表介绍了拓扑中使用的组件：
主要组件 |
设备类型 |
位 |
|---|---|---|
CE1 |
MX 系列 |
连接到客户网络。 |
PE1 |
MX 系列 |
配置主要和备份路由路径以保护和重新路由从 CE1 到 CE2 的流量。 |
P1-P3 |
MX 系列 |
传输信息流的核心路由器。 |
ABR1-ABR2 |
MX 系列 |
区域边界路由器 |
ABSR1-ABSR4 |
MX 系列 |
自治系统边界路由器 |
RR1-RR3 |
MX 系列 |
路由反射器 |
PE2-PE3 |
MX 系列 |
连接到客户边缘路由器（CE2）的 PE 路由器。 |
CE2 |
MX 系列 |
连接到客户网络。 |
PE2 和 PE3 设备地址均接受那么优质来自 ABR1 和 ABR2 as 标记为单播路由。这些路由通过 IGP/LDP 协议来解决。PE1 从 PE2 和 PE3 设备学习 CE2 路由。
配置
要使用将 LDP 作为传输协议的 BGP 标签单播配置 BGP PIC 边缘，请执行以下任务：
- CLI 快速配置
- 配置 CE1
- 配置 PE1
- 配置 P1 设备
- 配置 RR1 设备
- 配置 ABR1 设备
- 配置 ABR2 设备
- 配置 P2 设备
- 配置 RR2 设备
- 配置 ASBR1 设备
- 配置 ASBR2 设备
- 配置 ASBR3 设备
- 配置 ASBR4 设备
- 配置 RR3 设备
- 配置 P3 设备
- 配置 PE2
- 配置 PE3
- 配置 CE2
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后从commit配置模式进入。
设备 CE1
set interfaces ge-0/0/1 description CE1-to-PE1-Link1 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.0/31 set interfaces ge-0/0/2 description CE1-to-PE1-Link2 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.2/31 set interfaces lo0 unit 0 family inet address 4.4.4.4/32 set policy-options policy-statement nhs term 1 from interface lo0.0 set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set routing-options router-id 4.4.4.4 set routing-options autonomous-system 4 set protocols bgp path-selection external-router-id set protocols bgp group toAs2 export nhs set protocols bgp group toAs2 peer-as 2 set protocols bgp group toAs2 neighbor 192.168.0.1 set protocols bgp group toAs2 neighbor 192.168.0.3
设备 PE1
set interfaces ge-0/0/1 description PE1-to-CE1-Link1 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.1/31 set interfaces ge-0/0/2 description PE1-to-CE1-Link2 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.3/31 set interfaces ge-0/0/3 description PE1-to-P1 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.4/31 set interfaces ge-0/0/3 unit 0 family iso set interfaces ge-0/0/3 unit 0 family mpls set interfaces lo0 unit 1 family inet address 2.2.2.5/32 set interfaces lo0 unit 1 family iso address 49.0000.0000.aaaa.0005.00 set policy-options policy-statement add-noexport term 1 then community add noexport set policy-options policy-statement allow-lo0 term 1 from interface lo0.1 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement export-inet3 term 1 from rib inet.3 set policy-options policy-statement export-inet3 term 1 then accept set policy-options policy-statement export-inet3 term 2 then reject set policy-options policy-statement mp-resolv term 1 from route-filter 1.1.1.0/24 orlonger set policy-options policy-statement mp-resolv term 1 then accept set policy-options policy-statement mp-resolv term 1 then multipath-resolve set policy-options policy-statement mp-resolv term 2 from route-filter 2.2.2.0/24 orlonger set policy-options policy-statement mp-resolv term 2 then accept set policy-options policy-statement mp-resolv term 2 then multipath-resolve set policy-options policy-statement mp-resolv term def then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then local-preference 200 set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set policy-options policy-statement vrf-export-red term 1 then community add leak2red set policy-options policy-statement vrf-export-red term 1 then accept set policy-options policy-statement vrf-import-red term 1 from community leak2red set policy-options policy-statement vrf-import-red term 1 then accept set policy-options community leak2red members target:100:100 set policy-options community noexport members no-export set policy-options community noexport members no-advertise set routing-instances red routing-options multipath preserve-nexthop-hierarchy set routing-instances red routing-options protect core set routing-instances red protocols bgp group toCE1 peer-as 4 set routing-instances red protocols bgp group toCE1 neighbor 192.168.0.2 set routing-instances red instance-type vrf set routing-instances red interface ge-0/0/2.0 set routing-instances red vrf-import vrf-import-red set routing-instances red vrf-export vrf-export-red set routing-options rib inet.3 protect core set routing-options route-distinguisher-id 2.2.2.5 set routing-options forwarding-table export pplb set routing-options resolution preserve-nexthop-hierarchy set routing-options resolution rib inet.0 import mp-resolv set routing-options interface-routes rib-group inet inet0to3 set routing-options router-id 2.2.2.5 set routing-options autonomous-system 2 set routing-options protect core set routing-options rib-groups inet0to3 import-rib inet.0 set routing-options rib-groups inet0to3 import-rib inet.3 set routing-options rib-groups inet0to3 import-policy allow-lo0 set routing-options rib-groups inet3to0 import-rib inet.3 set routing-options rib-groups inet3to0 import-rib inet.0 set routing-options rib-groups inet3to0 import-policy add-noexport set protocols isis level 1 disable set protocols isis interface ge-0/0/3.0 set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface ge-0/0/3.0 set protocols ldp interface ge-0/0/3.0 set protocols mpls label-switched-path toABR1-gold to 2.2.2.3 set protocols mpls label-switched-path toABR1-bronze to 2.2.2.3 set protocols mpls label-switched-path toABR2-gold to 2.2.2.4 set protocols bgp path-selection external-router-id set protocols bgp group toAs2RR type internal set protocols bgp group toAs2RR local-address 2.2.2.5 set protocols bgp group toAs2RR family inet labeled-unicast rib-group inet3to0 set protocols bgp group toAs2RR family inet labeled-unicast add-path receive set protocols bgp group toAs2RR family inet labeled-unicast add-path send path-count 4 set protocols bgp group toAs2RR family inet labeled-unicast nexthop-resolution preserve-nexthop-hierarchy set protocols bgp group toAs2RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs2RR export nhs set protocols bgp group toAs2RR export export-inet3 set protocols bgp group toAs2RR neighbor 2.2.2.6 set protocols bgp group toAs4 peer-as 4 set protocols bgp group toAs4 neighbor 192.168.0.0 set protocols bgp group toAs1PEs multihop no-nexthop-change set protocols bgp group toAs1PEs local-address 2.2.2.5 set protocols bgp group toAs1PEs family inet unicast set protocols bgp group toAs1PEs family inet-vpn unicast set protocols bgp group toAs1PEs family inet6 unicast set protocols bgp group toAs1PEs family inet6-vpn unicast set protocols bgp group toAs1PEs export nhs set protocols bgp group toAs1PEs peer-as 1 set protocols bgp group toAs1PEs neighbor 1.1.1.1 set protocols bgp group toAs1PEs neighbor 1.1.1.2 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy set protocols bgp multipath
设备 P1
set interfaces ge-0/0/1 description P1-to-RR1 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.6/31 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 description P1-to-ABR1 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.8/31 set interfaces ge-0/0/2 unit 0 family iso set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/3 description P1-to-PE1 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.5/31 set interfaces ge-0/0/3 unit 0 family iso set interfaces ge-0/0/3 unit 0 family mpls set interfaces ge-0/0/4 description P1-to-ABR2 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.10/31 set interfaces ge-0/0/4 unit 0 family iso set interfaces ge-0/0/4 unit 0 family mpls set interfaces lo0 unit 0 family inet address 2.2.2.8/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0008.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set routing-options router-id 2.2.2.8 set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls interface all
设备 RR1
set interfaces ge-0/0/1 description RR1-to-P1 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.7/31 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 1 family inet address 2.2.2.6/32 set interfaces lo0 unit 1 family iso address 49.0000.0000.aaaa.0006.00 set policy-options policy-statement add-noexport term 1 then community add noexport set policy-options policy-statement allow-lo0 term 1 from interface lo0.1 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement export-inet3 term 1 from rib inet.3 set policy-options policy-statement export-inet3 term 1 then accept set policy-options policy-statement export-inet3 term 2 then reject set policy-options policy-statement pplb then load-balance per-packet set policy-options community noexport members no-export set policy-options community noexport members no-advertise set routing-options forwarding-table export pplb set routing-options interface-routes rib-group inet inet0to3 set routing-options router-id 2.2.2.6 set routing-options autonomous-system 2 set routing-options rib-groups inet0to3 import-rib inet.0 set routing-options rib-groups inet0to3 import-rib inet.3 set routing-options rib-groups inet0to3 import-policy allow-lo0 set routing-options rib-groups inet3to0 import-rib inet.3 set routing-options rib-groups inet3to0 import-rib inet.0 set routing-options rib-groups inet3to0 import-rib inet6.3 set routing-options rib-groups inet3to0 import-policy add-noexport set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls interface all set protocols bgp path-selection external-router-id set protocols bgp group toAs2Reg2BNs type internal set protocols bgp group toAs2Reg2BNs family inet labeled-unicast rib-group inet3to0 set protocols bgp group toAs2Reg2BNs family inet labeled-unicast add-path receive set protocols bgp group toAs2Reg2BNs family inet labeled-unicast add-path send path-count 4 set protocols bgp group toAs2Reg2BNs family inet labeled-unicast rib inet.3 set protocols bgp group toAs2Reg2BNs export export-inet3 set protocols bgp group toAs2Reg2BNs neighbor 2.2.2.3 set protocols bgp group toAs2Reg2BNs neighbor 2.2.2.4 set protocols bgp group toAs2Reg2BNs neighbor 2.2.2.5 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy set protocols bgp local-address 2.2.2.6 set protocols bgp cluster 2.2.2.6
设备 ABR1
set interfaces ge-0/0/1 description ABR1-to-P2 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.12/31 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 description ABR1-to-P1 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.9/31 set interfaces ge-0/0/2 unit 0 family iso set interfaces ge-0/0/2 unit 0 family mpls set interfaces lo0 unit 0 family inet address 2.2.2.3/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0003.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set routing-options forwarding-table export pplb set routing-options router-id 2.2.2.3 set routing-options autonomous-system 2 set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls label-switched-path toASBR2-gold to 2.2.2.2 set protocols mpls label-switched-path toASBR1-bronze to 2.2.2.1 set protocols mpls label-switched-path toASBR2-bronze to 2.2.2.2 set protocols mpls interface all set protocols bgp group toAs2RR type internal set protocols bgp group toAs2RR local-address 2.2.2.3 set protocols bgp group toAs2RR advertise-inactive set protocols bgp group toAs2RR family inet labeled-unicast add-path receive set protocols bgp group toAs2RR family inet labeled-unicast add-path send path-count 4 set protocols bgp group toAs2RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs2RR export nhs set protocols bgp group toAs2RR cluster 2.2.2.3 set protocols bgp group toAs2RR neighbor 2.2.2.6 set protocols bgp group toAs2RR neighbor 2.2.2.7 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 ABR2
set interfaces ge-0/0/2 description ABR2-to-P2 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.14/31 set interfaces ge-0/0/2 unit 0 family iso set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/4 description ABR2-to-P1 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.11/31 set interfaces ge-0/0/4 unit 0 family iso set interfaces ge-0/0/4 unit 0 family mpls set interfaces lo0 unit 0 family inet address 2.2.2.4/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0004.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set routing-options forwarding-table export pplb set routing-options router-id 2.2.2.4 set routing-options autonomous-system 2 set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls label-switched-path toASBR1-bronze to 2.2.2.1 set protocols mpls interface all set protocols bgp group toAs2RR type internal set protocols bgp group toAs2RR local-address 2.2.2.4 set protocols bgp group toAs2RR advertise-inactive set protocols bgp group toAs2RR family inet labeled-unicast add-path receive set protocols bgp group toAs2RR family inet labeled-unicast add-path send path-count 4 set protocols bgp group toAs2RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs2RR export nhs set protocols bgp group toAs2RR cluster 2.2.2.4 set protocols bgp group toAs2RR neighbor 2.2.2.6 set protocols bgp group toAs2RR neighbor 2.2.2.7 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 P2
set interfaces ge-0/0/1 description P2-to-ABR1 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.13/31 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 description P2-to-ABR2 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.15/31 set interfaces ge-0/0/2 unit 0 family iso set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/3 description P2-to-RR2 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.16/31 set interfaces ge-0/0/3 unit 0 family iso set interfaces ge-0/0/3 unit 0 family mpls set interfaces ge-0/0/4 description P2-to-ASBR1 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.18/31 set interfaces ge-0/0/4 unit 0 family iso set interfaces ge-0/0/4 unit 0 family mpls set interfaces ge-0/0/5 description P2-to-ASBR2 set interfaces ge-0/0/5 vlan-tagging set interfaces ge-0/0/5 unit 0 vlan-id 100 set interfaces ge-0/0/5 unit 0 family inet address 192.168.0.20/31 set interfaces ge-0/0/5 unit 0 family iso set interfaces ge-0/0/5 unit 0 family mpls set interfaces lo0 unit 0 family inet address 2.2.2.9/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0009.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set routing-options router-id 2.2.2.9 set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls interface all
设备 RR2
set interfaces ge-0/0/3 description RR2-to-P2 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.17/31 set interfaces ge-0/0/3 unit 0 family iso set interfaces ge-0/0/3 unit 0 family mpls set interfaces lo0 unit 1 family inet address 2.2.2.7/32 set interfaces lo0 unit 1 family iso address 49.0000.0000.aaaa.0007.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.1 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement export-inet3 term 1 from rib inet.3 set policy-options policy-statement export-inet3 term 1 then accept set policy-options policy-statement export-inet3 term 2 then reject set policy-options policy-statement pplb then load-balance per-packet set routing-options forwarding-table export pplb set routing-options interface-routes rib-group inet inet0to3 set routing-options router-id 2.2.2.7 set routing-options autonomous-system 2 set routing-options rib-groups inet0to3 import-rib inet.0 set routing-options rib-groups inet0to3 import-rib inet.3 set routing-options rib-groups inet0to3 import-policy allow-lo0 set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls interface all set protocols bgp path-selection external-router-id set protocols bgp group toAs2Reg1BNs type internal set protocols bgp group toAs2Reg1BNs family inet labeled-unicast add-path receive set protocols bgp group toAs2Reg1BNs family inet labeled-unicast add-path send path-count 4 set protocols bgp group toAs2Reg1BNs family inet labeled-unicast rib inet.3 set protocols bgp group toAs2Reg1BNs neighbor 2.2.2.1 set protocols bgp group toAs2Reg1BNs neighbor 2.2.2.2 set protocols bgp group toAs2Reg1BNs neighbor 2.2.2.3 set protocols bgp group toAs2Reg1BNs neighbor 2.2.2.4 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy set protocols bgp local-address 2.2.2.7 set protocols bgp cluster 2.2.2.7
设备 ASBR1
set interfaces ge-0/0/2 description ASBR1-to-ASBR3 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.22/31 set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/3 description ASBR1-to-ASBR4 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.24/31 set interfaces ge-0/0/3 unit 0 family mpls set interfaces ge-0/0/4 description ASBR1-to-P2 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.19/31 set interfaces ge-0/0/4 unit 0 family iso set interfaces ge-0/0/4 unit 0 family mpls set interfaces lo0 unit 0 family inet address 2.2.2.1/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0001.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set routing-options forwarding-table export pplb set routing-options router-id 2.2.2.1 set routing-options autonomous-system 2 set protocols isis level 1 disable set protocols isis interface ge-0/0/4.0 set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface ge-0/0/4.0 set protocols ldp interface ge-0/0/4.0 set protocols mpls interface ge-0/0/4.0 set protocols bgp path-selection external-router-id set protocols bgp group toAs1-T family inet labeled-unicast rib inet.3 set protocols bgp group toAs1-T peer-as 1 set protocols bgp group toAs1-T neighbor 192.168.0.23 set protocols bgp group toAs1-T neighbor 192.168.0.27 set protocols bgp group toAs2RR type internal set protocols bgp group toAs2RR local-address 2.2.2.1 set protocols bgp group toAs2RR advertise-external set protocols bgp group toAs2RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs2RR export nhs set protocols bgp group toAs2RR neighbor 2.2.2.7 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 ASBR2
set interfaces ge-0/0/1 description ASBR2-to-ASBR3 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.28/31 set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 description ASBR2-to-ASBR4 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.26/31 set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/5 description ASBR2-to-P2 set interfaces ge-0/0/5 vlan-tagging set interfaces ge-0/0/5 unit 0 vlan-id 100 set interfaces ge-0/0/5 unit 0 family inet address 192.168.0.21/31 set interfaces ge-0/0/5 unit 0 family iso set interfaces ge-0/0/5 unit 0 family mpls set interfaces lo0 unit 0 family inet address 2.2.2.2/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0002.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set routing-options forwarding-table export pplb set routing-options router-id 2.2.2.2 set routing-options autonomous-system 2 set protocols isis level 1 disable set protocols isis interface ge-0/0/5.0 set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface ge-0/0/5.0 set protocols ldp interface ge-0/0/5.0 set protocols mpls interface ge-0/0/5.0 set protocols bgp path-selection external-router-id set protocols bgp group toAs1-T family inet labeled-unicast rib inet.3 set protocols bgp group toAs1-T peer-as 1 set protocols bgp group toAs1-T neighbor 192.168.0.29 set protocols bgp group toAs1-T neighbor 192.168.0.25 set protocols bgp group toAs2RR type internal set protocols bgp group toAs2RR local-address 2.2.2.2 set protocols bgp group toAs2RR advertise-external set protocols bgp group toAs2RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs2RR export nhs set protocols bgp group toAs2RR neighbor 2.2.2.7 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 ASBR3
set interfaces ge-0/0/1 description ASBR3-to-ASBR2 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.29/31 set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 description ASBR3-to-ASBR1 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.23/31 set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/4 description ASBR3-to-P3 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.30/31 set interfaces ge-0/0/4 unit 0 family iso set interfaces ge-0/0/4 unit 0 family mpls set interfaces lo0 unit 0 family inet address 1.1.1.3/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0003.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set routing-options forwarding-table export pplb set routing-options router-id 1.1.1.3 set routing-options autonomous-system 1 set protocols isis level 1 disable set protocols isis interface ge-0/0/4.0 set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface ge-0/0/4.0 set protocols ldp interface ge-0/0/4.0 set protocols mpls label-switched-path toPE2-gold to 1.1.1.1 set protocols mpls interface ge-0/0/4.0 set protocols bgp path-selection external-router-id set protocols bgp group toAs2-T family inet labeled-unicast rib inet.3 set protocols bgp group toAs2-T peer-as 2 set protocols bgp group toAs2-T neighbor 192.168.0.22 set protocols bgp group toAs2-T neighbor 192.168.0.28 set protocols bgp group toAs1RR type internal set protocols bgp group toAs1RR local-address 1.1.1.3 set protocols bgp group toAs1RR advertise-external set protocols bgp group toAs1RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs1RR export nhs set protocols bgp group toAs1RR neighbor 1.1.1.6 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 ASBR4
set interfaces ge-0/0/1 description ASBR4-to-P3 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.32/31 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 description ASBR4-to-ASBR2 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.27/31 set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/3 description ASBR4-to-ASBR1 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.25/31 set interfaces ge-0/0/3 unit 0 family mpls set interfaces lo0 unit 0 family inet address 1.1.1.4/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0004.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set routing-options forwarding-table export pplb set routing-options router-id 1.1.1.4 set routing-options autonomous-system 1 set protocols isis level 1 disable set protocols isis interface ge-0/0/1.0 set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface ge-0/0/1.0 set protocols ldp interface ge-0/0/1.0 set protocols mpls label-switched-path toPE2-bronze to 1.1.1.1 set protocols mpls label-switched-path toPE3-bronze to 1.1.1.2 set protocols mpls interface ge-0/0/1.0 set protocols bgp path-selection external-router-id set protocols bgp group toAs2-T family inet labeled-unicast rib inet.3 set protocols bgp group toAs2-T peer-as 2 set protocols bgp group toAs2-T neighbor 192.168.0.26 set protocols bgp group toAs2-T neighbor 192.168.0.24 set protocols bgp group toAs1RR type internal set protocols bgp group toAs1RR local-address 1.1.1.4 set protocols bgp group toAs1RR advertise-external set protocols bgp group toAs1RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs1RR export nhs set protocols bgp group toAs1RR neighbor 1.1.1.6 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 RR3
set interfaces ge-0/0/2 description RR3-to-P3 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.35/31 set interfaces ge-0/0/2 unit 0 family iso set interfaces ge-0/0/2 unit 0 family mpls set interfaces lo0 unit 1 family inet address 1.1.1.6/32 set interfaces lo0 unit 1 family iso address 49.0000.0000.aaaa.0006.00 set policy-options policy-statement add-noexport term 1 then community add noexport set policy-options policy-statement allow-lo0 term 1 from interface lo0.1 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement export-inet3 term 1 from rib inet.3 set policy-options policy-statement export-inet3 term 1 then accept set policy-options policy-statement export-inet3 term 2 then reject set policy-options policy-statement pplb then load-balance per-packet set policy-options community noexport members no-export set policy-options community noexport members no-advertise set routing-options forwarding-table export pplb set routing-options interface-routes rib-group inet inet0to3 set routing-options router-id 1.1.1.6 set routing-options autonomous-system 1 set routing-options rib-groups inet0to3 import-rib inet.0 set routing-options rib-groups inet0to3 import-rib inet.3 set routing-options rib-groups inet0to3 import-policy allow-lo0 set routing-options rib-groups inet3to0 import-rib inet.3 set routing-options rib-groups inet3to0 import-rib inet.0 set routing-options rib-groups inet3to0 import-policy add-noexport set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls interface all set protocols bgp path-selection external-router-id set protocols bgp group toAs1BNs type internal set protocols bgp group toAs1BNs family inet labeled-unicast rib-group inet3to0 set protocols bgp group toAs1BNs family inet labeled-unicast add-path receive set protocols bgp group toAs1BNs family inet labeled-unicast add-path send path-count 4 set protocols bgp group toAs1BNs family inet labeled-unicast rib inet.3 set protocols bgp group toAs1BNs export export-inet3 set protocols bgp group toAs1BNs neighbor 1.1.1.3 set protocols bgp group toAs1BNs neighbor 1.1.1.4 set protocols bgp group toAs1BNs neighbor 1.1.1.2 set protocols bgp group toAs1BNs neighbor 1.1.1.1 set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy set protocols bgp local-address 1.1.1.6 set protocols bgp cluster 1.1.1.6
设备 P3
set interfaces ge-0/0/1 description P3-to-ASBR4 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.33/31 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-0/0/1 unit 0 family mpls set interfaces ge-0/0/2 description P3-to-RR3 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.34/31 set interfaces ge-0/0/2 unit 0 family iso set interfaces ge-0/0/2 unit 0 family mpls set interfaces ge-0/0/3 description P3-to-PE2 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.36/31 set interfaces ge-0/0/3 unit 0 family iso set interfaces ge-0/0/3 unit 0 family mpls set interfaces ge-0/0/4 description P3-to-ASBR3 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.31/31 set interfaces ge-0/0/4 unit 0 family iso set interfaces ge-0/0/4 unit 0 family mpls set interfaces ge-0/0/5 description P3-to-PE3 set interfaces ge-0/0/5 vlan-tagging set interfaces ge-0/0/5 unit 0 vlan-id 100 set interfaces ge-0/0/5 unit 0 family inet address 192.168.0.38/31 set interfaces ge-0/0/5 unit 0 family iso set interfaces ge-0/0/5 unit 0 family mpls set interfaces lo0 unit 0 family inet address 1.1.1.5/32 set interfaces lo0 unit 0 family iso address 49.0000.0000.aaaa.0005.00 set policy-options policy-statement allow-lo0 term 1 from interface lo0.0 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set routing-options router-id 1.1.1.5 set protocols isis level 1 disable set protocols isis interface all set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface all set protocols ldp interface all set protocols mpls interface all
设备 PE2
set interfaces ge-0/0/1 description PE2-to-CE2-Link1 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.40/31 set interfaces ge-0/0/2 description PE2-to-CE2-Link2 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.42/31 set interfaces ge-0/0/3 description PE2-to-P3 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.37/31 set interfaces ge-0/0/3 unit 0 family iso set interfaces ge-0/0/3 unit 0 family mpls set interfaces lo0 unit 1 family inet address 1.1.1.1/32 set interfaces lo0 unit 1 family iso address 49.0000.0000.aaaa.0001.00 set policy-options policy-statement add-noexport term 1 then community add noexport set policy-options policy-statement allow-lo0 term 1 from interface lo0.1 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement export-inet3 term 1 from rib inet.3 set policy-options policy-statement export-inet3 term 1 then accept set policy-options policy-statement export-inet3 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then metric add 0 set policy-options policy-statement nhs term 1 then local-preference 200 set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set policy-options policy-statement vrf-export-red term 1 then community add leak2red set policy-options policy-statement vrf-export-red term 1 then accept set policy-options policy-statement vrf-import-red term 1 from community leak2red set policy-options policy-statement vrf-import-red term 1 then accept set policy-options community leak2red members target:100:100 set policy-options community noexport members no-export set policy-options community noexport members no-advertise set routing-instances red protocols bgp group toCE2 peer-as 3 set routing-instances red protocols bgp group toCE2 neighbor 192.168.0.43 set routing-instances red instance-type vrf set routing-instances red interface ge-0/0/2.0 set routing-instances red vrf-import vrf-import-red set routing-instances red vrf-export vrf-export-red set routing-options route-distinguisher-id 1.1.1.1 set routing-options forwarding-table export pplb set routing-options interface-routes rib-group inet inet0to3 set routing-options router-id 1.1.1.1 set routing-options autonomous-system 1 set routing-options rib-groups inet0to3 import-rib inet.0 set routing-options rib-groups inet0to3 import-rib inet.3 set routing-options rib-groups inet0to3 import-policy allow-lo0 set routing-options rib-groups inet3to0 import-rib inet.3 set routing-options rib-groups inet3to0 import-rib inet.0 set routing-options rib-groups inet3to0 import-policy add-noexport set protocols isis level 1 disable set protocols isis interface ge-0/0/3.0 set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface ge-0/0/3.0 set protocols ldp interface ge-0/0/3.0 set protocols mpls interface ge-0/0/3.0 set protocols bgp path-selection external-router-id set protocols bgp group toAs3-1 peer-as 3 set protocols bgp group toAs3-1 neighbor 192.168.0.41 set protocols bgp group toAs1RR type internal set protocols bgp group toAs1RR local-address 1.1.1.1 set protocols bgp group toAs1RR advertise-external set protocols bgp group toAs1RR family inet labeled-unicast rib-group inet3to0 set protocols bgp group toAs1RR family inet labeled-unicast add-path receive set protocols bgp group toAs1RR family inet labeled-unicast add-path send path-count 4 set protocols bgp group toAs1RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs1RR family inet6-vpn unicast set protocols bgp group toAs1RR export nhs set protocols bgp group toAs1RR export export-inet3 set protocols bgp group toAs1RR neighbor 1.1.1.6 set protocols bgp group toAs2PEs multihop no-nexthop-change set protocols bgp group toAs2PEs local-address 1.1.1.1 set protocols bgp group toAs2PEs family inet unicast set protocols bgp group toAs2PEs family inet-vpn unicast set protocols bgp group toAs2PEs family inet6 unicast set protocols bgp group toAs2PEs family inet6-vpn unicast set protocols bgp group toAs2PEs export nhs set protocols bgp group toAs2PEs peer-as 2 set protocols bgp group toAs2PEs neighbor 2.2.2.5 set protocols bgp group toAs2PEs vpn-apply-export set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 PE3
set interfaces ge-0/0/3 description PE3-to-CE2-Link1 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.44/31 set interfaces ge-0/0/4 description PE3-to-CE2-Link2 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.46/31 set interfaces ge-0/0/5 description PE3-to-P3 set interfaces ge-0/0/5 vlan-tagging set interfaces ge-0/0/5 unit 0 vlan-id 100 set interfaces ge-0/0/5 unit 0 family inet address 192.168.0.39/31 set interfaces ge-0/0/5 unit 0 family iso set interfaces ge-0/0/5 unit 0 family mpls set interfaces lo0 unit 1 family inet address 1.1.1.2/32 set interfaces lo0 unit 1 family iso address 49.0000.0000.aaaa.0002.00 set policy-options policy-statement add-noexport term 1 then community add noexport set policy-options policy-statement allow-lo0 term 1 from interface lo0.1 set policy-options policy-statement allow-lo0 term 1 then accept set policy-options policy-statement allow-lo0 term 2 then reject set policy-options policy-statement export-inet3 term 1 from rib inet.3 set policy-options policy-statement export-inet3 term 1 then accept set policy-options policy-statement export-inet3 term 2 then reject set policy-options policy-statement nhs term 1 from protocol bgp set policy-options policy-statement nhs term 1 then metric add 0 set policy-options policy-statement nhs term 1 then local-preference 200 set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement pplb then load-balance per-packet set policy-options policy-statement vrf-export-red term 1 then community add leak2red set policy-options policy-statement vrf-export-red term 1 then accept set policy-options policy-statement vrf-import-red term 1 from community leak2red set policy-options policy-statement vrf-import-red term 1 then accept set policy-options community leak2red members target:100:100 set policy-options community noexport members no-export set policy-options community noexport members no-advertise set routing-instances red protocols bgp group toCE2 peer-as 3 set routing-instances red protocols bgp group toCE2 neighbor 192.168.0.47 set routing-instances red instance-type vrf set routing-instances red interface ge-0/0/4.0 set routing-instances red vrf-import vrf-import-red set routing-instances red vrf-export vrf-export-red set routing-options route-distinguisher-id 1.1.1.2 set routing-options forwarding-table export pplb set routing-options interface-routes rib-group inet inet0to3 set routing-options router-id 1.1.1.2 set routing-options autonomous-system 1 set routing-options rib-groups inet0to3 import-rib inet.0 set routing-options rib-groups inet0to3 import-rib inet.3 set routing-options rib-groups inet0to3 import-policy allow-lo0 set routing-options rib-groups inet3to0 import-rib inet.3 set routing-options rib-groups inet3to0 import-rib inet.0 set routing-options rib-groups inet3to0 import-policy add-noexport set protocols isis level 1 disable set protocols isis interface ge-0/0/5.0 set protocols isis export allow-lo0 set protocols isis topologies ipv6-unicast set protocols rsvp interface ge-0/0/5.0 set protocols ldp interface ge-0/0/5.0 set protocols mpls interface ge-0/0/5.0 set protocols bgp path-selection external-router-id set protocols bgp group toAs3 peer-as 3 set protocols bgp group toAs3 neighbor 192.168.0.45 set protocols bgp group toAs1RR type internal set protocols bgp group toAs1RR local-address 1.1.1.2 set protocols bgp group toAs1RR advertise-external set protocols bgp group toAs1RR family inet labeled-unicast rib-group inet3to0 set protocols bgp group toAs1RR family inet labeled-unicast rib inet.3 set protocols bgp group toAs1RR export nhs set protocols bgp group toAs1RR export export-inet3 set protocols bgp group toAs1RR neighbor 1.1.1.6 set protocols bgp group toAs2PEs multihop no-nexthop-change set protocols bgp group toAs2PEs local-address 1.1.1.2 set protocols bgp group toAs2PEs family inet unicast set protocols bgp group toAs2PEs family inet-vpn unicast set protocols bgp group toAs2PEs family inet6 unicast set protocols bgp group toAs2PEs family inet6-vpn unicast set protocols bgp group toAs2PEs export nhs set protocols bgp group toAs2PEs peer-as 2 set protocols bgp group toAs2PEs neighbor 2.2.2.5 set protocols bgp group toAs2PEs vpn-apply-export set protocols bgp traceoptions file bgp.log set protocols bgp traceoptions file size 100m set protocols bgp traceoptions flag state detail set protocols bgp traceoptions flag policy
设备 CE2
set interfaces ge-0/0/1 description CE2-to-PE2-Link1 set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 unit 0 vlan-id 100 set interfaces ge-0/0/1 unit 0 family inet address 192.168.0.41/31 set interfaces ge-0/0/2 description CE2-to-PE2-Link2 set interfaces ge-0/0/2 vlan-tagging set interfaces ge-0/0/2 unit 0 vlan-id 100 set interfaces ge-0/0/2 unit 0 family inet address 192.168.0.43/31 set interfaces ge-0/0/3 description CE2-to-PE3-Link1 set interfaces ge-0/0/3 vlan-tagging set interfaces ge-0/0/3 unit 0 vlan-id 100 set interfaces ge-0/0/3 unit 0 family inet address 192.168.0.45/31 set interfaces ge-0/0/4 description CE2-to-PE3-Link2 set interfaces ge-0/0/4 vlan-tagging set interfaces ge-0/0/4 unit 0 vlan-id 100 set interfaces ge-0/0/4 unit 0 family inet address 192.168.0.47/31 set interfaces lo0 unit 0 family inet address 3.3.3.3/32 set policy-options policy-statement nhs term 1 from interface lo0.0 set policy-options policy-statement nhs term 1 then metric 50 set policy-options policy-statement nhs term 1 then next-hop self set policy-options policy-statement nhs term 1 then accept set policy-options policy-statement nhsMED100 term 1 from interface lo0.0 set policy-options policy-statement nhsMED100 term 1 then metric 100 set policy-options policy-statement nhsMED100 term 1 then next-hop self set policy-options policy-statement nhsMED100 term 1 then accept set policy-options community map2bronze members 100:200 set policy-options community map2gold members 100:100 set policy-options community map2gold_bronze_plain members 300:400 set routing-options router-id 3.3.3.3 set routing-options autonomous-system 3 set protocols bgp path-selection external-router-id set protocols bgp group toAs1Internet export nhs set protocols bgp group toAs1Internet peer-as 1 set protocols bgp group toAs1Internet neighbor 192.168.0.40 set protocols bgp group toAs1Internet neighbor 192.168.0.44 export nhsMED100 set protocols bgp group toAs1L3VPN export nhs set protocols bgp group toAs1L3VPN peer-as 1 set protocols bgp group toAs1L3VPN neighbor 192.168.0.46 set protocols bgp group toAs1L3VPN neighbor 192.168.0.42 export nhsMED100
配置 CE1
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 CE1：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@CE1#set ge-0/0/1 description CE1-to-PE1-Link1 user@CE1#set ge-0/0/1 vlan-tagging user@CE1#set ge-0/0/1 unit 0 vlan-id 100 user@CE1#set ge-0/0/1 unit 0 family inet address 192.168.0.0/31 user@CE1#set ge-0/0/2 description CE1-to-PE1-Link2 user@CE1#set ge-0/0/2 vlan-tagging user@CE1#set ge-0/0/2 unit 0 vlan-id 100 user@CE1#set ge-0/0/2 unit 0 family inet address 192.168.0.2/31
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@CE1#set lo0 unit 0 family inet address 4.4.4.4/32
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@CE1#set policy-statement nhs term 1 from interface lo0.0 user@CE1#set policy-statement nhs term 1 then next-hop self user@CE1#set policy-statement nhs term 1 then accept
配置路由选项。
[edit routing-options] user@CE1#set router-id 4.4.4.4 user@CE1#set autonomous-system 4
将标记为 unicast ABRs 的 BGP 配置为将回传 IP 地址交换为标记为单播前缀 BGP。
[edit protocols bgp] user@CE1#set path-selection external-router-id user@CE1#set group toAs2 export nhs user@CE1#set group toAs2 peer-as 2 user@CE1#set group toAs2 neighbor 192.168.0.1 user@CE1#set group toAs2 neighbor 192.168.0.3
成果
从配置模式， show interfaces输入、 show policy-optionsshow routing-options、和show protocols命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description CE1-to-PE1-Link1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.0/31;
}
}
}
ge-0/0/2 {
description CE1-to-PE1-Link2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.2/31;
}
}
}
lo0 {
unit 0 {
family inet {
address 4.4.4.4/32;
}
}
}
}
policy-options {
policy-statement nhs {
term 1 {
from interface lo0.0;
then {
next-hop self;
accept;
}
}
}
}
routing-options {
router-id 4.4.4.4;
autonomous-system 4;
}
protocols {
bgp {
path-selection external-router-id;
group toAs2 {
export nhs;
peer-as 2;
neighbor 192.168.0.1;
neighbor 192.168.0.3;
}
}
}
配置 PE1
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 PE1：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@PE1#set ge-0/0/1 description PE1-to-CE1-Link1 user@PE1#set ge-0/0/1 vlan-tagging user@PE1#set ge-0/0/1 unit 0 vlan-id 100 user@PE1#set ge-0/0/1 unit 0 family inet address 192.168.0.1/31 user@PE1#set ge-0/0/2 description PE1-to-CE1-Link2 user@PE1#set ge-0/0/2 vlan-tagging user@PE1#set ge-0/0/2 unit 0 vlan-id 100 user@PE1#set ge-0/0/2 unit 0 family inet address 192.168.0.3/31 user@PE1#set ge-0/0/3 description PE1-to-P1 user@PE1#set ge-0/0/3 vlan-tagging user@PE1#set ge-0/0/3 unit 0 vlan-id 100 user@PE1#set ge-0/0/3 unit 0 family inet address 192.168.0.4/31 user@PE1#set ge-0/0/3 unit 0 family iso user@PE1#set ge-0/0/3 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@PE1#set lo0 unit 1 family inet address 2.2.2.5/32 user@PE1#set lo0 unit 1 family iso address 49.0000.0000.aaaa.0005.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@PE1#set policy-statement add-noexport term 1 then community add noexport user@PE1#set policy-statement allow-lo0 term 1 from interface lo0.1 user@PE1#set policy-statement allow-lo0 term 1 then accept user@PE1#set policy-statement allow-lo0 term 2 then reject user@PE1#set policy-statement export-inet3 term 1 from rib inet.3 user@PE1#set policy-statement export-inet3 term 1 then accept user@PE1#set policy-statement export-inet3 term 2 then reject user@PE1#set policy-statement mp-resolv term 1 from route-filter 1.1.1.0/24 orlonger user@PE1#set policy-statement mp-resolv term 1 then accept user@PE1#set policy-statement mp-resolv term 1 then multipath-resolve user@PE1#set policy-statement mp-resolv term 2 from route-filter 2.2.2.0/24 orlonger user@PE1#set policy-statement mp-resolv term 2 then accept user@PE1#set policy-statement mp-resolv term 2 then multipath-resolve user@PE1#set policy-statement mp-resolv term def then reject user@PE1#set policy-statement nhs term 1 from protocol bgp user@PE1#set policy-statement nhs term 1 then local-preference 200 user@PE1#set policy-statement nhs term 1 then next-hop self user@PE1#set policy-statement nhs term 1 then accept user@PE1#set policy-statement pplb then load-balance per-packet user@PE1#set policy-statement vrf-export-red term 1 then community add leak2red user@PE1#set policy-statement vrf-export-red term 1 then accept user@PE1#set policy-statement vrf-import-red term 1 from community leak2red user@PE1#set policy-statement vrf-import-red term 1 then accept user@PE1#set community leak2red members target:100:100 user@PE1#set community noexport members no-export user@PE1#set community noexport members no-advertise
配置3层 VPN 路由实例以提供客户服务。
[edit routing-instances] user@PE1#set red routing-options multipath preserve-nexthop-hierarchy user@PE1#set red routing-options protect core user@PE1#set red protocols bgp group toCE1 peer-as 4 user@PE1#set red protocols bgp group toCE1 neighbor 192.168.0.2 user@PE1#set red instance-type vrf user@PE1#set red interface ge-0/0/2.0 user@PE1#set red vrf-import vrf-import-red user@PE1#set red vrf-export vrf-export-red
配置解析器筋导入策略和解析肋条为在策略中指定的选定第3层 VPN 前缀启用扩展的层次结构 nexthop 结构。
[edit routing-options] user@PE1#set rib inet.3 protect core user@PE1#set route-distinguisher-id 2.2.2.5 user@PE1#set forwarding-table export pplb user@PE1#set resolution preserve-nexthop-hierarchy user@PE1#set resolution rib inet.0 import mp-resolv user@PE1#set interface-routes rib-group inet inet0to3 user@PE1#set router-id 2.2.2.5 user@PE1#set autonomous-system 2 user@PE1#set protect core user@PE1#set rib-groups inet0to3 import-rib inet.0 user@PE1#set rib-groups inet0to3 import-rib inet.3 user@PE1#set rib-groups inet0to3 import-policy allow-lo0 user@PE1#set rib-groups inet3to0 import-rib inet.3 user@PE1#set rib-groups inet3to0 import-rib inet.0 user@PE1#set rib-groups inet3to0 import-policy add-noexport
配置 OSPF 协议。
[edit protocols ospf] user@PE1#set protocols ospf area 0.0.0.0 interface all link-protection; user@PE1#set protocols ospf area 0.0.0.0 interface fxp0.0 disable; user@PE1#set protocols ospf area 0.0.0.0 interface lo0.0 passive;
配置路由协议，以在MPLS建立 IP 和交换连接。
[edit protocols] user@PE1#set isis level 1 disable user@PE1#set isis interface ge-0/0/3.0 user@PE1#set isis export allow-lo0 user@PE1#set isis topologies ipv6-unicast user@PE1#set rsvp interface ge-0/0/3.0 user@PE1#set ldp interface ge-0/0/3.0 user@PE1#set mpls label-switched-path toABR1-gold to 2.2.2.3 user@PE1#set mpls label-switched-path toABR1-bronze to 2.2.2.3 user@PE1#set mpls label-switched-path toABR2-gold to 2.2.2.4
将标记为 unicast ABRs 的 BGP 配置为将回传 IP 地址交换为标记为单播前缀 BGP。
[edit protocols bgp] user@PE1#set path-selection external-router-id user@PE1#set group toAs2RR type internal user@PE1#set group toAs2RR local-address 2.2.2.5 user@PE1#set group toAs2RR family inet labeled-unicast rib-group inet3to0 user@PE1#set group toAs2RR family inet labeled-unicast add-path receive user@PE1#set group toAs2RR family inet labeled-unicast add-path send path-count 4 user@PE1#set group toAs2RR family inet labeled-unicast nexthop-resolution preserve-nexthop-hierarchy user@PE1#set group toAs2RR family inet labeled-unicast rib inet.3 user@PE1#set group toAs2RR export nhs user@PE1#set group toAs2RR export export-inet3 user@PE1#set group toAs2RR neighbor 2.2.2.6 user@PE1#set group toAs4 peer-as 4 user@PE1#set group toAs4 neighbor 192.168.0.0 user@PE1#set group toAs1PEs multihop no-nexthop-change user@PE1#set group toAs1PEs local-address 2.2.2.5 user@PE1#set group toAs1PEs family inet unicast user@PE1#set group toAs1PEs family inet-vpn unicast user@PE1#set group toAs1PEs family inet6 unicast user@PE1#set group toAs1PEs family inet6-vpn unicast user@PE1#set group toAs1PEs export nhs user@PE1#set group toAs1PEs peer-as 1 user@PE1#set group toAs1PEs neighbor 1.1.1.1 user@PE1#set group toAs1PEs neighbor 1.1.1.2 user@PE1#set traceoptions file bgp.log user@PE1#set traceoptions file size 100m user@PE1#set traceoptions flag state detail user@PE1#set traceoptions flag policy user@PE1#set multipath
成果
从show chassis配置模式，输入、 show interfacesshow policy-optionsshow routing-instancesshow routing-options、、、和show protocols命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description PE1-to-CE1-Link1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.1/31;
}
}
}
ge-0/0/2 {
description PE1-to-CE1-Link2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.3/31;
}
}
}
ge-0/0/3 {
description PE1-to-P1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.4/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 1 {
family inet {
address 2.2.2.5/32;
}
family iso {
address 49.0000.0000.aaaa.0005.00;
}
}
}
}
policy-options {
policy-statement add-noexport {
term 1 {
then {
community add noexport;
}
}
}
policy-statement allow-lo0 {
term 1 {
from interface lo0.1;
then accept;
}
term 2 {
then reject;
}
}
policy-statement export-inet3 {
term 1 {
from rib inet.3;
then accept;
}
term 2 {
then reject;
}
}
policy-statement mp-resolv {
term 1 {
from {
route-filter 1.1.1.0/24 orlonger;
}
then {
accept;
multipath-resolve;
}
}
term 2 {
from {
route-filter 2.2.2.0/24 orlonger;
}
then {
accept;
multipath-resolve;
}
}
term def {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
local-preference 200;
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
policy-statement vrf-export-red {
term 1 {
then {
community add leak2red;
accept;
}
}
}
policy-statement vrf-import-red {
term 1 {
from community leak2red;
then accept;
}
}
community leak2red members target:100:100;
community noexport members [ no-export no-advertise ];
}
routing-instances {
red {
routing-options {
multipath preserve-nexthop-hierarchy;
protect core;
}
protocols {
bgp {
group toCE1 {
peer-as 4;
neighbor 192.168.0.2;
}
}
}
instance-type vrf;
interface ge-0/0/2.0;
vrf-import vrf-import-red;
vrf-export vrf-export-red;
}
}
routing-options {
rib inet.3 {
protect core;
}
route-distinguisher-id 2.2.2.5;
forwarding-table {
export pplb;
}
resolution {
preserve-nexthop-hierarchy;
rib inet.0 {
import mp-resolv;
}
}
interface-routes {
rib-group inet inet0to3;
}
router-id 2.2.2.5;
autonomous-system 2;
protect core;
rib-groups {
inet0to3 {
import-rib [ inet.0 inet.3 ];
import-policy allow-lo0;
}
inet3to0 {
import-rib [ inet.3 inet.0 ];
import-policy add-noexport;
}
}
}
protocols {
isis {
level 1 disable;
interface ge-0/0/3.0;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface ge-0/0/3.0;
}
bgp {
path-selection external-router-id;
group toAs2RR {
type internal;
local-address 2.2.2.5;
family inet {
labeled-unicast {
rib-group inet3to0;
add-path {
receive;
send {
path-count 4;
}
}
nexthop-resolution {
preserve-nexthop-hierarchy;
}
rib {
inet.3;
}
}
}
export [ nhs export-inet3 ];
neighbor 2.2.2.6;
}
group toAs4 {
peer-as 4;
neighbor 192.168.0.0;
}
group toAs1PEs {
multihop {
no-nexthop-change;
}
local-address 2.2.2.5;
family inet {
unicast;
}
family inet-vpn {
unicast;
}
family inet6 {
unicast;
}
family inet6-vpn {
unicast;
}
export nhs;
peer-as 1;
neighbor 1.1.1.1;
neighbor 1.1.1.2;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
multipath;
}
ldp {
interface ge-0/0/3.0;
}
mpls {
label-switched-path toABR1-gold {
to 2.2.2.3;
}
label-switched-path toABR1-bronze {
to 2.2.2.3;
}
label-switched-path toABR2-gold {
to 2.2.2.4;
}
}
}
配置 P1 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 P1：
配置接口。
[edit interfaces] user@P1#set ge-0/0/1 description P1-to-RR1 user@P1#set ge-0/0/1 vlan-tagging user@P1#set ge-0/0/1 unit 0 vlan-id 100 user@P1#set ge-0/0/1 unit 0 family inet address 192.168.0.6/31 user@P1#set ge-0/0/1 unit 0 family iso user@P1#set ge-0/0/1 unit 0 family mpls user@P1#set ge-0/0/2 description P1-to-ABR1 user@P1#set ge-0/0/2 vlan-tagging user@P1#set ge-0/0/2 unit 0 vlan-id 100 user@P1#set ge-0/0/2 unit 0 family inet address 192.168.0.8/31 user@P1#set ge-0/0/2 unit 0 family iso user@P1#set ge-0/0/2 unit 0 family mpls user@P1#set ge-0/0/3 description P1-to-PE1 user@P1#set ge-0/0/3 vlan-tagging user@P1#set ge-0/0/3 unit 0 vlan-id 100 user@P1#set ge-0/0/3 unit 0 family inet address 192.168.0.5/31 user@P1#set ge-0/0/3 unit 0 family iso user@P1#set ge-0/0/3 unit 0 family mpls user@P1#set ge-0/0/4 description P1-to-ABR2 user@P1#set ge-0/0/4 vlan-tagging user@P1#set ge-0/0/4 unit 0 vlan-id 100 user@P1#set ge-0/0/4 unit 0 family inet address 192.168.0.10/31 user@P1#set ge-0/0/4 unit 0 family iso user@P1#set ge-0/0/4 unit 0 family mpls
配置回传接口。
[edit interfaces] user@P1#set lo0 unit 0 family inet address 2.2.2.8/32 user@P1#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0008.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@P1#set policy-statement allow-lo0 term 1 from interface lo0.0 user@P1#set policy-statement allow-lo0 term 1 then accept user@P1#set policy-statement allow-lo0 term 2 then reject
配置路由选项。
[edit routing-options] user@P1#set router-id 2.2.2.8
在接口上配置 ISIS、RSVP、LDP MPLS协议。
[edit protocols] user@P1#set isis level 1 disable user@P1#set isis interface all user@P1#set isis export allow-lo0 user@P1#set isis topologies ipv6-unicast user@P1#set rsvp interface all user@P1#set ldp interface all user@P1#set mpls interface all
成果
从配置模式，输入show interfaces、 show policy-options和show protocols命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description P1-to-RR1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.6/31;
}
family iso;
family mpls;
}
}
ge-0/0/2 {
description P1-to-ABR1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.8/31;
}
family iso;
family mpls;
}
}
ge-0/0/3 {
description P1-to-PE1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.5/31;
}
family iso;
family mpls;
}
}
ge-0/0/4 {
description P1-to-ABR2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.10/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.8/32;
}
family iso {
address 49.0000.0000.aaaa.0008.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
}
routing-options {
router-id 2.2.2.8;
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
ldp {
interface all;
}
mpls {
interface all;
}
}
配置 RR1 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 RR1：
配置接口。
[edit interfaces] user@RR1#set ge-0/0/1 description RR1-to-P1 user@RR1#set ge-0/0/1 vlan-tagging user@RR1#set ge-0/0/1 unit 0 vlan-id 100 user@RR1#set ge-0/0/1 unit 0 family inet address 192.168.0.7/31 user@RR1#set ge-0/0/1 unit 0 family iso user@RR1#set ge-0/0/1 unit 0 family mpls
配置回传接口。
[edit interfaces] user@RR1#set lo0 unit 1 family inet address 2.2.2.6/32 user@RR1#set lo0 unit 1 family iso address 49.0000.0000.aaaa.0006.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@RR1#set policy-statement add-noexport term 1 then community add noexport user@RR1#set policy-statement allow-lo0 term 1 from interface lo0.1 user@RR1#set policy-statement allow-lo0 term 1 then accept user@RR1#set policy-statement allow-lo0 term 2 then reject user@RR1#set policy-statement export-inet3 term 1 from rib inet.3 user@RR1#set policy-statement export-inet3 term 1 then accept user@RR1#set policy-statement export-inet3 term 2 then reject user@RR1#set policy-statement pplb then load-balance per-packet user@RR1#set community noexport members no-export user@RR1#set community noexport members no-advertise
配置路由选项。
[edit routing-options] user@RR1#set forwarding-table export pplb user@RR1#set interface-routes rib-group inet inet0to3 user@RR1#set router-id 2.2.2.6 user@RR1#set autonomous-system 2 user@RR1#set rib-groups inet0to3 import-rib inet.0 user@RR1#set rib-groups inet0to3 import-rib inet.3 user@RR1#set rib-groups inet0to3 import-policy allow-lo0 user@RR1#set rib-groups inet3to0 import-rib inet.3 user@RR1#set rib-groups inet3to0 import-rib inet.0 user@RR1#set rib-groups inet3to0 import-rib inet6.3 user@RR1#set rib-groups inet3to0 import-policy add-noexport
在接口上配置 ISIS、RSVP、LDP MPLS协议。
[edit protocols] user@RR1#set isis level 1 disable user@RR1#set isis interface all user@RR1#set isis export allow-lo0 user@RR1#set isis topologies ipv6-unicast user@RR1#set rsvp interface all user@RR1#set ldp interface all user@RR1#set mpls interface all
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols bgp] user@RR1#set path-selection external-router-id user@RR1#set group toAs2Reg2BNs type internal user@RR1#set group toAs2Reg2BNs family inet labeled-unicast rib-group inet3to0 user@RR1#set group toAs2Reg2BNs family inet labeled-unicast add-path receive user@RR1#set group toAs2Reg2BNs family inet labeled-unicast add-path send path-count 4 user@RR1#set group toAs2Reg2BNs family inet labeled-unicast rib inet.3 user@RR1#set group toAs2Reg2BNs export export-inet3 user@RR1#set group toAs2Reg2BNs neighbor 2.2.2.3 user@RR1#set group toAs2Reg2BNs neighbor 2.2.2.4 user@RR1#set group toAs2Reg2BNs neighbor 2.2.2.5 user@RR1#set traceoptions file bgp.log user@RR1#set traceoptions file size 100m user@RR1#set traceoptions flag state detail user@RR1#set traceoptions flag policy user@RR1#set local-address 2.2.2.6 user@RR1#set cluster 2.2.2.6
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description RR1-to-P1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.7/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 1 {
family inet {
address 2.2.2.6/32;
}
family iso {
address 49.0000.0000.aaaa.0006.00;
}
}
}
}
policy-options {
policy-statement add-noexport {
term 1 {
then {
community add noexport;
}
}
}
policy-statement allow-lo0 {
term 1 {
from interface lo0.1;
then accept;
}
term 2 {
then reject;
}
}
policy-statement export-inet3 {
term 1 {
from rib inet.3;
then accept;
}
term 2 {
then reject;
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
community noexport members [ no-export no-advertise ];
}
routing-options {
forwarding-table {
export pplb;
}
interface-routes {
rib-group inet inet0to3;
}
router-id 2.2.2.6;
autonomous-system 2;
rib-groups {
inet0to3 {
import-rib [ inet.0 inet.3 ];
import-policy allow-lo0;
}
inet3to0 {
import-rib [ inet.3 inet.0 inet6.3 ];
import-policy add-noexport;
}
}
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
bgp {
path-selection external-router-id;
group toAs2Reg2BNs {
type internal;
family inet {
labeled-unicast {
rib-group inet3to0;
add-path {
receive;
send {
path-count 4;
}
}
rib {
inet.3;
}
}
}
export export-inet3;
neighbor 2.2.2.3;
neighbor 2.2.2.4;
neighbor 2.2.2.5;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
local-address 2.2.2.6;
cluster 2.2.2.6;
}
ldp {
interface all;
}
mpls {
interface all;
}
}
配置 ABR1 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 ABR1：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@ABR1#set ge-0/0/1 description ABR1-to-P2 user@ABR1#set ge-0/0/1 vlan-tagging user@ABR1#set ge-0/0/1 unit 0 vlan-id 100 user@ABR1#set ge-0/0/1 unit 0 family inet address 192.168.0.12/31 user@ABR1#set ge-0/0/1 unit 0 family iso user@ABR1#set ge-0/0/1 unit 0 family mpls user@ABR1#set ge-0/0/2 description ABR1-to-P1 user@ABR1#set ge-0/0/2 vlan-tagging user@ABR1#set ge-0/0/2 unit 0 vlan-id 100 user@ABR1#set ge-0/0/2 unit 0 family inet address 192.168.0.9/31 user@ABR1#set ge-0/0/2 unit 0 family iso user@ABR1#set ge-0/0/2 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@ABR1#set lo0 unit 0 family inet address 2.2.2.3/32 user@ABR1#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0003.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@ABR1#set policy-statement allow-lo0 term 1 from interface lo0.0 user@ABR1#set policy-statement allow-lo0 term 1 then accept user@ABR1#set policy-statement allow-lo0 term 2 then reject user@ABR1#set policy-statement nhs term 1 from protocol bgp user@ABR1#set policy-statement nhs term 1 then next-hop self user@ABR1#set policy-statement nhs term 1 then accept user@ABR1#set policy-statement pplb then load-balance per-packet
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@ABR1#set forwarding-table export pplb user@ABR1#set router-id 2.2.2.3 user@ABR1#set autonomous-system 2
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@ABR1#set isis level 1 disable user@ABR1#set isis interface all user@ABR1#set isis export allow-lo0 user@ABR1#set isis topologies ipv6-unicast user@ABR1#set rsvp interface all user@ABR1#set ldp interface all user@ABR1#set mpls label-switched-path toASBR2-gold to 2.2.2.2 user@ABR1#set mpls label-switched-path toASBR1-bronze to 2.2.2.1 user@ABR1#set mpls label-switched-path toASBR2-bronze to 2.2.2.2 user@ABR1#set mpls interface all
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@ABR1#set bgp group toAs2RR type internal user@ABR1#set bgp group toAs2RR local-address 2.2.2.3 user@ABR1#set bgp group toAs2RR advertise-inactive user@ABR1#set bgp group toAs2RR family inet labeled-unicast add-path receive user@ABR1#set bgp group toAs2RR family inet labeled-unicast add-path send path-count 4 user@ABR1#set bgp group toAs2RR family inet labeled-unicast rib inet.3 user@ABR1#set bgp group toAs2RR export nhs user@ABR1#set bgp group toAs2RR cluster 2.2.2.3 user@ABR1#set bgp group toAs2RR neighbor 2.2.2.6 user@ABR1#set bgp group toAs2RR neighbor 2.2.2.7 user@ABR1#set bgp traceoptions file bgp.log user@ABR1#set bgp traceoptions file size 100m user@ABR1#set bgp traceoptions flag state detail user@ABR1#set bgp traceoptions flag policy
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description ABR1-to-P2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.12/31;
}
family iso;
family mpls;
}
}
ge-0/0/2 {
description ABR1-to-P1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.9/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.3/32;
}
family iso {
address 49.0000.0000.aaaa.0003.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
}
routing-options {
forwarding-table {
export pplb;
}
router-id 2.2.2.3;
autonomous-system 2;
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
bgp {
group toAs2RR {
type internal;
local-address 2.2.2.3;
advertise-inactive;
family inet {
labeled-unicast {
add-path {
receive;
send {
path-count 4;
}
}
rib {
inet.3;
}
}
}
export nhs;
cluster 2.2.2.3;
neighbor 2.2.2.6;
neighbor 2.2.2.7;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface all;
}
mpls {
label-switched-path toASBR2-gold {
to 2.2.2.2;
}
label-switched-path toASBR1-bronze {
to 2.2.2.1;
}
label-switched-path toASBR2-bronze {
to 2.2.2.2;
}
interface all;
}
}
配置 ABR2 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 ABR2：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@ABR2#set ge-0/0/2 description ABR2-to-P2 user@ABR2#set ge-0/0/2 vlan-tagging user@ABR2#set ge-0/0/2 unit 0 vlan-id 100 user@ABR2#set ge-0/0/2 unit 0 family inet address 192.168.0.14/31 user@ABR2#set ge-0/0/2 unit 0 family iso user@ABR2#set ge-0/0/2 unit 0 family mpls user@ABR2#set ge-0/0/4 description ABR2-to-P1 user@ABR2#set ge-0/0/4 vlan-tagging user@ABR2#set ge-0/0/4 unit 0 vlan-id 100 user@ABR2#set ge-0/0/4 unit 0 family inet address 192.168.0.11/31 user@ABR2#set ge-0/0/4 unit 0 family iso user@ABR2#set ge-0/0/4 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@ABR2#set lo0 unit 0 family inet address 2.2.2.4/32 user@ABR2#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0004.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@ABR2#set policy-statement allow-lo0 term 1 from interface lo0.0 user@ABR2#set policy-statement allow-lo0 term 1 then accept user@ABR2#set policy-statement allow-lo0 term 2 then reject user@ABR2#set policy-statement nhs term 1 from protocol bgp user@ABR2#set policy-statement nhs term 1 then next-hop self user@ABR2#set policy-statement nhs term 1 then accept user@ABR2#set policy-statement pplb then load-balance per-packet
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@ABR2#set forwarding-table export pplb user@ABR2#set router-id 2.2.2.4 user@ABR2#set autonomous-system 2
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@ABR2#set isis level 1 disable user@ABR2#set isis interface all user@ABR2#set isis export allow-lo0 user@ABR2#set isis topologies ipv6-unicast user@ABR2#set rsvp interface all user@ABR2#set ldp interface all user@ABR2#set mpls label-switched-path toASBR1-bronze to 2.2.2.1 user@ABR2#set mpls interface all
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@ABR2#set bgp group toAs2RR type internal user@ABR2#set bgp group toAs2RR local-address 2.2.2.4 user@ABR2#set bgp group toAs2RR advertise-inactive user@ABR2#set bgp group toAs2RR family inet labeled-unicast add-path receive user@ABR2#set bgp group toAs2RR family inet labeled-unicast add-path send path-count 4 user@ABR2#set bgp group toAs2RR family inet labeled-unicast rib inet.3 user@ABR2#set bgp group toAs2RR export nhs user@ABR2#set bgp group toAs2RR cluster 2.2.2.4 user@ABR2#set bgp group toAs2RR neighbor 2.2.2.6 user@ABR2#set bgp group toAs2RR neighbor 2.2.2.7 user@ABR2#set bgp traceoptions file bgp.log user@ABR2#set bgp traceoptions file size 100m user@ABR2#set bgp traceoptions flag state detail user@ABR2#set bgp traceoptions flag policy
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/2 {
description ABR2-to-P2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.14/31;
}
family iso;
family mpls;
}
}
ge-0/0/4 {
description ABR2-to-P1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.11/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.4/32;
}
family iso {
address 49.0000.0000.aaaa.0004.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
}
routing-options {
forwarding-table {
export pplb;
}
router-id 2.2.2.4;
autonomous-system 2;
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
bgp {
group toAs2RR {
type internal;
local-address 2.2.2.4;
advertise-inactive;
family inet {
labeled-unicast {
add-path {
receive;
send {
path-count 4;
}
}
rib {
inet.3;
}
}
}
export nhs;
cluster 2.2.2.4;
neighbor 2.2.2.6;
neighbor 2.2.2.7;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface all;
}
mpls {
label-switched-path toASBR1-bronze {
to 2.2.2.1;
}
interface all;
}
}
配置 P2 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 P2：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@P2#set ge-0/0/1 description P2-to-ABR1 user@P2#set ge-0/0/1 vlan-tagging user@P2#set ge-0/0/1 unit 0 vlan-id 100 user@P2#set ge-0/0/1 unit 0 family inet address 192.168.0.13/31 user@P2#set ge-0/0/1 unit 0 family iso user@P2#set ge-0/0/1 unit 0 family mpls user@P2#set ge-0/0/2 description P2-to-ABR2 user@P2#set ge-0/0/2 vlan-tagging user@P2#set ge-0/0/2 unit 0 vlan-id 100 user@P2#set ge-0/0/2 unit 0 family inet address 192.168.0.15/31 user@P2#set ge-0/0/2 unit 0 family iso user@P2#set ge-0/0/2 unit 0 family mpls user@P2#set ge-0/0/3 description P2-to-RR2 user@P2#set ge-0/0/3 vlan-tagging user@P2#set ge-0/0/3 unit 0 vlan-id 100 user@P2#set ge-0/0/3 unit 0 family inet address 192.168.0.16/31 user@P2#set ge-0/0/3 unit 0 family iso user@P2#set ge-0/0/3 unit 0 family mpls user@P2#set ge-0/0/4 description P2-to-ASBR1 user@P2#set ge-0/0/4 vlan-tagging user@P2#set ge-0/0/4 unit 0 vlan-id 100 user@P2#set ge-0/0/4 unit 0 family inet address 192.168.0.18/31 user@P2#set ge-0/0/4 unit 0 family iso user@P2#set ge-0/0/4 unit 0 family mpls user@P2#set ge-0/0/5 description P2-to-ASBR2 user@P2#set ge-0/0/5 vlan-tagging user@P2#set ge-0/0/5 unit 0 vlan-id 100 user@P2#set ge-0/0/5 unit 0 family inet address 192.168.0.20/31 user@P2#set ge-0/0/5 unit 0 family iso user@P2#set ge-0/0/5 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@P2#set lo0 unit 0 family inet address 2.2.2.9/32 user@P2#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0009.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@P2#set policy-statement allow-lo0 term 1 from interface lo0.0 user@P2#set policy-statement allow-lo0 term 1 then accept user@P2#set policy-statement allow-lo0 term 2 then reject
配置路由选项。
[edit routing-options] user@P2#set router-id 2.2.2.9
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@P2#set isis level 1 disable user@P2#set isis interface all user@P2#set isis export allow-lo0 user@P2#set isis topologies ipv6-unicast user@P2#set rsvp interface all user@P2#set ldp interface all user@P2#set mpls interface all
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description P2-to-ABR1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.13/31;
}
family iso;
family mpls;
}
}
ge-0/0/2 {
description P2-to-ABR2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.15/31;
}
family iso;
family mpls;
}
}
ge-0/0/3 {
description P2-to-RR2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.16/31;
}
family iso;
family mpls;
}
}
ge-0/0/4 {
description P2-to-ASBR1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.18/31;
}
family iso;
family mpls;
}
}
ge-0/0/5 {
description P2-to-ASBR2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.20/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.9/32;
}
family iso {
address 49.0000.0000.aaaa.0009.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
}
routing-options {
router-id 2.2.2.9;
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
ldp {
interface all;
}
mpls {
interface all;
}
}
配置 RR2 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 RR2：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@RR2#set ge-0/0/3 description RR2-to-P2 user@RR2#set ge-0/0/3 vlan-tagging user@RR2#set ge-0/0/3 unit 0 vlan-id 100 user@RR2#set ge-0/0/3 unit 0 family inet address 192.168.0.17/31 user@RR2#set ge-0/0/3 unit 0 family iso user@RR2#set ge-0/0/3 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@RR2#set lo0 unit 1 family inet address 2.2.2.7/32 user@RR2#set lo0 unit 1 family iso address 49.0000.0000.aaaa.0007.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@RR2#set policy-statement allow-lo0 term 1 from interface lo0.1 user@RR2#set policy-statement allow-lo0 term 1 then accept user@RR2#set policy-statement allow-lo0 term 2 then reject user@RR2#set policy-statement export-inet3 term 1 from rib inet.3 user@RR2#set policy-statement export-inet3 term 1 then accept user@RR2#set policy-statement export-inet3 term 2 then reject user@RR2#set policy-statement pplb then load-balance per-packet
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@RR2#set forwarding-table export pplb user@RR2#set interface-routes rib-group inet inet0to3 user@RR2#set router-id 2.2.2.7 user@RR2#set autonomous-system 2 user@RR2#set rib-groups inet0to3 import-rib inet.0 user@RR2#set rib-groups inet0to3 import-rib inet.3 user@RR2#set rib-groups inet0to3 import-policy allow-lo0
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@RR2#set isis level 1 disable user@RR2#set isis interface all user@RR2#set isis export allow-lo0 user@RR2#set isis topologies ipv6-unicast user@RR2#set rsvp interface all user@RR2#set ldp interface all user@RR2#set mpls interface all
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@RR2#set bgp path-selection external-router-id user@RR2#set bgp group toAs2Reg1BNs type internal user@RR2#set bgp group toAs2Reg1BNs family inet labeled-unicast add-path receive user@RR2#set bgp group toAs2Reg1BNs family inet labeled-unicast add-path send path-count 4 user@RR2#set bgp group toAs2Reg1BNs family inet labeled-unicast rib inet.3 user@RR2#set bgp group toAs2Reg1BNs neighbor 2.2.2.1 user@RR2#set bgp group toAs2Reg1BNs neighbor 2.2.2.2 user@RR2#set bgp group toAs2Reg1BNs neighbor 2.2.2.3 user@RR2#set bgp group toAs2Reg1BNs neighbor 2.2.2.4 user@RR2#set bgp traceoptions file bgp.log user@RR2#set bgp traceoptions file size 100m user@RR2#set bgp traceoptions flag state detail user@RR2#set bgp traceoptions flag policy user@RR2#set bgp local-address 2.2.2.7 user@RR2#set bgp cluster 2.2.2.7
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/3 {
description RR2-to-P2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.17/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 1 {
family inet {
address 2.2.2.7/32;
}
family iso {
address 49.0000.0000.aaaa.0007.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.1;
then accept;
}
term 2 {
then reject;
}
}
policy-statement export-inet3 {
term 1 {
from rib inet.3;
then accept;
}
term 2 {
then reject;
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
}
routing-options {
forwarding-table {
export pplb;
}
interface-routes {
rib-group inet inet0to3;
}
router-id 2.2.2.7;
autonomous-system 2;
rib-groups {
inet0to3 {
import-rib [ inet.0 inet.3 ];
import-policy allow-lo0;
}
}
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
bgp {
path-selection external-router-id;
group toAs2Reg1BNs {
type internal;
family inet {
labeled-unicast {
add-path {
receive;
send {
path-count 4;
}
}
rib {
inet.3;
}
}
}
neighbor 2.2.2.1;
neighbor 2.2.2.2;
neighbor 2.2.2.3;
neighbor 2.2.2.4;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
local-address 2.2.2.7;
cluster 2.2.2.7;
}
ldp {
interface all;
}
mpls {
interface all;
}
}
配置 ASBR1 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 ASBR1：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@ASBR1#set ge-0/0/2 description ASBR1-to-ASBR3 user@ASBR1#set ge-0/0/2 vlan-tagging user@ASBR1#set ge-0/0/2 unit 0 vlan-id 100 user@ASBR1#set ge-0/0/2 unit 0 family inet address 192.168.0.22/31 user@ASBR1#set ge-0/0/2 unit 0 family mpls user@ASBR1#set ge-0/0/3 description ASBR1-to-ASBR4 user@ASBR1#set ge-0/0/3 vlan-tagging user@ASBR1#set ge-0/0/3 unit 0 vlan-id 100 user@ASBR1#set ge-0/0/3 unit 0 family inet address 192.168.0.24/31 user@ASBR1#set ge-0/0/3 unit 0 family mpls user@ASBR1#set ge-0/0/4 description ASBR1-to-P2 user@ASBR1#set ge-0/0/4 vlan-tagging user@ASBR1#set ge-0/0/4 unit 0 vlan-id 100 user@ASBR1#set ge-0/0/4 unit 0 family inet address 192.168.0.19/31 user@ASBR1#set ge-0/0/4 unit 0 family iso user@ASBR1#set ge-0/0/4 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@ASBR1#set lo0 unit 0 family inet address 2.2.2.1/32 user@ASBR1#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0001.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@ASBR1#set policy-statement allow-lo0 term 1 from interface lo0.0 user@ASBR1#set policy-statement allow-lo0 term 1 then accept user@ASBR1#set policy-statement allow-lo0 term 2 then reject user@ASBR1#set policy-statement nhs term 1 from protocol bgp user@ASBR1#set policy-statement nhs term 1 then next-hop self user@ASBR1#set policy-statement nhs term 1 then accept user@ASBR1#set policy-statement pplb then load-balance per-packet
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@ASBR1#set forwarding-table export pplb user@ASBR1#set router-id 2.2.2.1 user@ASBR1#set autonomous-system 2
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@ASBR1#set isis level 1 disable user@ASBR1#set isis interface ge-0/0/4.0 user@ASBR1#set isis export allow-lo0 user@ASBR1#set isis topologies ipv6-unicast user@ASBR1#set rsvp interface ge-0/0/4.0 user@ASBR1#set ldp interface ge-0/0/4.0 user@ASBR1#set mpls interface ge-0/0/4.0
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@ASBR1#set bgp path-selection external-router-id user@ASBR1#set bgp group toAs1-T family inet labeled-unicast rib inet.3 user@ASBR1#set bgp group toAs1-T peer-as 1 user@ASBR1#set bgp group toAs1-T neighbor 192.168.0.23 user@ASBR1#set bgp group toAs1-T neighbor 192.168.0.27 user@ASBR1#set bgp group toAs2RR type internal user@ASBR1#set bgp group toAs2RR local-address 2.2.2.1 user@ASBR1#set bgp group toAs2RR advertise-external user@ASBR1#set bgp group toAs2RR family inet labeled-unicast rib inet.3 user@ASBR1#set bgp group toAs2RR export nhs user@ASBR1#set bgp group toAs2RR neighbor 2.2.2.7 user@ASBR1#set bgp traceoptions file bgp.log user@ASBR1#set bgp traceoptions file size 100m user@ASBR1#set bgp traceoptions flag state detail user@ASBR1#set bgp traceoptions flag policy
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/2 {
description ASBR1-to-ASBR3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.22/31;
}
family mpls;
}
}
ge-0/0/3 {
description ASBR1-to-ASBR4;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.24/31;
}
family mpls;
}
}
ge-0/0/4 {
description ASBR1-to-P2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.19/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.1/32;
}
family iso {
address 49.0000.0000.aaaa.0001.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
}
routing-options {
forwarding-table {
export pplb;
}
router-id 2.2.2.1;
autonomous-system 2;
}
protocols {
isis {
level 1 disable;
interface ge-0/0/4.0;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface ge-0/0/4.0;
}
bgp {
path-selection external-router-id;
group toAs1-T {
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
peer-as 1;
neighbor 192.168.0.23;
neighbor 192.168.0.27;
}
group toAs2RR {
type internal;
local-address 2.2.2.1;
advertise-external;
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
export nhs;
neighbor 2.2.2.7;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface ge-0/0/4.0;
}
mpls {
interface ge-0/0/4.0;
}
}
配置 ASBR2 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 ASBR2：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@ASBR2#set ge-0/0/1 description ASBR2-to-ASBR3 user@ASBR2#set ge-0/0/1 vlan-tagging user@ASBR2#set ge-0/0/1 unit 0 vlan-id 100 user@ASBR2#set ge-0/0/1 unit 0 family inet address 192.168.0.28/31 user@ASBR2#set ge-0/0/1 unit 0 family mpls user@ASBR2#set ge-0/0/2 description ASBR2-to-ASBR4 user@ASBR2#set ge-0/0/2 vlan-tagging user@ASBR2#set ge-0/0/2 unit 0 vlan-id 100 user@ASBR2#set ge-0/0/2 unit 0 family inet address 192.168.0.26/31 user@ASBR2#set ge-0/0/2 unit 0 family mpls user@ASBR2#set ge-0/0/5 description ASBR2-to-P2 user@ASBR2#set ge-0/0/5 vlan-tagging user@ASBR2#set ge-0/0/5 unit 0 vlan-id 100 user@ASBR2#set ge-0/0/5 unit 0 family inet address 192.168.0.21/31 user@ASBR2#set ge-0/0/5 unit 0 family iso user@ASBR2#set ge-0/0/5 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@ASBR2#set lo0 unit 0 family inet address 2.2.2.2/32 user@ASBR2#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0002.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@ASBR2#set policy-statement allow-lo0 term 1 from interface lo0.0 user@ASBR2#set policy-statement allow-lo0 term 1 then accept user@ASBR2#set policy-statement allow-lo0 term 2 then reject user@ASBR2#set policy-statement nhs term 1 from protocol bgp user@ASBR2#set policy-statement nhs term 1 then next-hop self user@ASBR2#set policy-statement nhs term 1 then accept user@ASBR2#set policy-statement pplb then load-balance per-packet
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@ASBR2#set forwarding-table export pplb user@ASBR2#set router-id 2.2.2.2 user@ASBR2#set autonomous-system 2
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@ASBR2#set isis level 1 disable user@ASBR2#set isis interface ge-0/0/5.0 user@ASBR2#set isis export allow-lo0 user@ASBR2#set isis topologies ipv6-unicast user@ASBR2#set rsvp interface ge-0/0/5.0 user@ASBR2#set ldp interface ge-0/0/5.0 user@ASBR2#set mpls interface ge-0/0/5.0
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@ASBR2#set bgp path-selection external-router-id user@ASBR2#set bgp group toAs1-T family inet labeled-unicast rib inet.3 user@ASBR2#set bgp group toAs1-T peer-as 1 user@ASBR2#set bgp group toAs1-T neighbor 192.168.0.29 user@ASBR2#set bgp group toAs1-T neighbor 192.168.0.25 user@ASBR2#set bgp group toAs2RR type internal user@ASBR2#set bgp group toAs2RR local-address 2.2.2.2 user@ASBR2#set bgp group toAs2RR advertise-external user@ASBR2#set bgp group toAs2RR family inet labeled-unicast rib inet.3 user@ASBR2#set bgp group toAs2RR export nhs user@ASBR2#set bgp group toAs2RR neighbor 2.2.2.7 user@ASBR2#set bgp traceoptions file bgp.log user@ASBR2#set bgp traceoptions file size 100m user@ASBR2#set bgp traceoptions flag state detail user@ASBR2#set bgp traceoptions flag policy
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description ASBR2-to-ASBR3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.28/31;
}
family mpls;
}
}
ge-0/0/2 {
description ASBR2-to-ASBR4;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.26/31;
}
family mpls;
}
}
ge-0/0/5 {
description ASBR2-to-P2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.21/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 2.2.2.2/32;
}
family iso {
address 49.0000.0000.aaaa.0002.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
}
routing-options {
forwarding-table {
export pplb;
}
router-id 2.2.2.2;
autonomous-system 2;
}
protocols {
isis {
level 1 disable;
interface ge-0/0/5.0;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface ge-0/0/5.0;
}
bgp {
path-selection external-router-id;
group toAs1-T {
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
peer-as 1;
neighbor 192.168.0.29;
neighbor 192.168.0.25;
}
group toAs2RR {
type internal;
local-address 2.2.2.2;
advertise-external;
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
export nhs;
neighbor 2.2.2.7;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface ge-0/0/5.0;
}
mpls {
interface ge-0/0/5.0;
}
}
配置 ASBR3 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 ASBR3：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@ASBR3#set ge-0/0/1 description ASBR3-to-ASBR2 user@ASBR3#set ge-0/0/1 vlan-tagging user@ASBR3#set ge-0/0/1 unit 0 vlan-id 100 user@ASBR3#set ge-0/0/1 unit 0 family inet address 192.168.0.29/31 user@ASBR3#set ge-0/0/1 unit 0 family mpls user@ASBR3#set ge-0/0/2 description ASBR3-to-ASBR1 user@ASBR3#set ge-0/0/2 vlan-tagging user@ASBR3#set ge-0/0/2 unit 0 vlan-id 100 user@ASBR3#set ge-0/0/2 unit 0 family inet address 192.168.0.23/31 user@ASBR3#set ge-0/0/2 unit 0 family mpls user@ASBR3#set ge-0/0/4 description ASBR3-to-P3 user@ASBR3#set ge-0/0/4 vlan-tagging user@ASBR3#set ge-0/0/4 unit 0 vlan-id 100 user@ASBR3#set ge-0/0/4 unit 0 family inet address 192.168.0.30/31 user@ASBR3#set ge-0/0/4 unit 0 family iso user@ASBR3#set ge-0/0/4 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@ASBR3#set lo0 unit 0 family inet address 1.1.1.3/32 user@ASBR3#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0003.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@ASBR3#set policy-statement allow-lo0 term 1 from interface lo0.0 user@ASBR3#set policy-statement allow-lo0 term 1 then accept user@ASBR3#set policy-statement allow-lo0 term 2 then reject user@ASBR3#set policy-statement nhs term 1 from protocol bgp user@ASBR3#set policy-statement nhs term 1 then next-hop self user@ASBR3#set policy-statement nhs term 1 then accept user@ASBR3#set policy-statement pplb then load-balance per-packet
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@ASBR3#set forwarding-table export pplb user@ASBR3#set router-id 1.1.1.3 user@ASBR3#set autonomous-system 1
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@ASBR3#set isis level 1 disable user@ASBR3#set isis interface ge-0/0/4.0 user@ASBR3#set isis export allow-lo0 user@ASBR3#set isis topologies ipv6-unicast user@ASBR3#set rsvp interface ge-0/0/4.0 user@ASBR3#set ldp interface ge-0/0/4.0 user@ASBR3#set mpls label-switched-path toPE2-gold to 1.1.1.1 user@ASBR3#set mpls interface ge-0/0/4.0
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@ASBR3#set bgp path-selection external-router-id user@ASBR3#set bgp group toAs2-T family inet labeled-unicast rib inet.3 user@ASBR3#set bgp group toAs2-T peer-as 2 user@ASBR3#set bgp group toAs2-T neighbor 192.168.0.22 user@ASBR3#set bgp group toAs2-T neighbor 192.168.0.28 user@ASBR3#set bgp group toAs1RR type internal user@ASBR3#set bgp group toAs1RR local-address 1.1.1.3 user@ASBR3#set bgp group toAs1RR advertise-external user@ASBR3#set bgp group toAs1RR family inet labeled-unicast rib inet.3 user@ASBR3#set bgp group toAs1RR export nhs user@ASBR3#set bgp group toAs1RR neighbor 1.1.1.6 user@ASBR3#set bgp traceoptions file bgp.log user@ASBR3#set bgp traceoptions file size 100m user@ASBR3#set bgp traceoptions flag state detail user@ASBR3#set bgp traceoptions flag policy
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description ASBR3-to-ASBR2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.29/31;
}
family mpls;
}
}
ge-0/0/2 {
description ASBR3-to-ASBR1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.23/31;
}
family mpls;
}
}
ge-0/0/4 {
description ASBR3-to-P3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.30/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 1.1.1.3/32;
}
family iso {
address 49.0000.0000.aaaa.0003.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
}
routing-options {
forwarding-table {
export pplb;
}
router-id 1.1.1.3;
autonomous-system 1;
}
protocols {
isis {
level 1 disable;
interface ge-0/0/4.0;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface ge-0/0/4.0;
}
bgp {
path-selection external-router-id;
group toAs2-T {
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
peer-as 2;
neighbor 192.168.0.22;
neighbor 192.168.0.28;
}
group toAs1RR {
type internal;
local-address 1.1.1.3;
advertise-external;
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
export nhs;
neighbor 1.1.1.6;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface ge-0/0/4.0;
}
mpls {
label-switched-path toPE2-gold {
to 1.1.1.1;
}
interface ge-0/0/4.0;
}
}
配置 ASBR4 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 ASBR4：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@ASBR4#set ge-0/0/1 description ASBR4-to-P3 user@ASBR4#set ge-0/0/1 vlan-tagging user@ASBR4#set ge-0/0/1 unit 0 vlan-id 100 user@ASBR4#set ge-0/0/1 unit 0 family inet address 192.168.0.32/31 user@ASBR4#set ge-0/0/1 unit 0 family iso user@ASBR4#set ge-0/0/1 unit 0 family mpls user@ASBR4#set ge-0/0/2 description ASBR4-to-ASBR2 user@ASBR4#set ge-0/0/2 vlan-tagging user@ASBR4#set ge-0/0/2 unit 0 vlan-id 100 user@ASBR4#set ge-0/0/2 unit 0 family inet address 192.168.0.27/31 user@ASBR4#set ge-0/0/2 unit 0 family mpls user@ASBR4#set ge-0/0/3 description ASBR4-to-ASBR1 user@ASBR4#set ge-0/0/3 vlan-tagging user@ASBR4#set ge-0/0/3 unit 0 vlan-id 100 user@ASBR4#set ge-0/0/3 unit 0 family inet address 192.168.0.25/31 user@ASBR4#set ge-0/0/3 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@ASBR4#set lo0 unit 0 family inet address 1.1.1.4/32 user@ASBR4#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0004.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@ASBR4#set policy-statement allow-lo0 term 1 from interface lo0.0 user@ASBR4#set policy-statement allow-lo0 term 1 then accept user@ASBR4#set policy-statement allow-lo0 term 2 then reject user@ASBR4#set policy-statement nhs term 1 from protocol bgp user@ASBR4#set policy-statement nhs term 1 then next-hop self user@ASBR4#set policy-statement nhs term 1 then accept user@ASBR4#set policy-statement pplb then load-balance per-packet
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@ASBR4#set forwarding-table export pplb user@ASBR4#set router-id 1.1.1.4 user@ASBR4#set autonomous-system 1
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@ASBR4#set isis level 1 disable user@ASBR4#set isis interface ge-0/0/1.0 user@ASBR4#set isis export allow-lo0 user@ASBR4#set isis topologies ipv6-unicast user@ASBR4#set rsvp interface ge-0/0/1.0 user@ASBR4#set ldp interface ge-0/0/1.0 user@ASBR4#set mpls label-switched-path toPE2-bronze to 1.1.1.1 user@ASBR4#set mpls label-switched-path toPE3-bronze to 1.1.1.2 user@ASBR4#set mpls interface ge-0/0/1.0
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@ASBR4#set bgp path-selection external-router-id user@ASBR4#set bgp group toAs2-T family inet labeled-unicast rib inet.3 user@ASBR4#set bgp group toAs2-T peer-as 2 user@ASBR4#set bgp group toAs2-T neighbor 192.168.0.26 user@ASBR4#set bgp group toAs2-T neighbor 192.168.0.24 user@ASBR4#set bgp group toAs1RR type internal user@ASBR4#set bgp group toAs1RR local-address 1.1.1.4 user@ASBR4#set bgp group toAs1RR advertise-external user@ASBR4#set bgp group toAs1RR family inet labeled-unicast rib inet.3 user@ASBR4#set bgp group toAs1RR export nhs user@ASBR4#set bgp group toAs1RR neighbor 1.1.1.6 user@ASBR4#set bgp traceoptions file bgp.log user@ASBR4#set bgp traceoptions file size 100m user@ASBR4#set bgp traceoptions flag state detail user@ASBR4#set bgp traceoptions flag policy
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description ASBR4-to-P3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.32/31;
}
family iso;
family mpls;
}
}
ge-0/0/2 {
description ASBR4-to-ASBR2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.27/31;
}
family mpls;
}
}
ge-0/0/3 {
description ASBR4-to-ASBR1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.25/31;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 1.1.1.4/32;
}
family iso {
address 49.0000.0000.aaaa.0004.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
}
routing-options {
forwarding-table {
export pplb;
}
router-id 1.1.1.4;
autonomous-system 1;
}
protocols {
isis {
level 1 disable;
interface ge-0/0/1.0;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface ge-0/0/1.0;
}
bgp {
path-selection external-router-id;
group toAs2-T {
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
peer-as 2;
neighbor 192.168.0.26;
neighbor 192.168.0.24;
}
group toAs1RR {
type internal;
local-address 1.1.1.4;
advertise-external;
family inet {
labeled-unicast {
rib {
inet.3;
}
}
}
export nhs;
neighbor 1.1.1.6;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface ge-0/0/1.0;
}
mpls {
label-switched-path toPE2-bronze {
to 1.1.1.1;
}
label-switched-path toPE3-bronze {
to 1.1.1.2;
}
interface ge-0/0/1.0;
}
}
配置 RR3 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 RR3：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@RR3#set ge-0/0/2 description RR3-to-P3 user@RR3#set ge-0/0/2 vlan-tagging user@RR3#set ge-0/0/2 unit 0 vlan-id 100 user@RR3#set ge-0/0/2 unit 0 family inet address 192.168.0.35/31 user@RR3#set ge-0/0/2 unit 0 family iso user@RR3#set ge-0/0/2 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@RR3#set lo0 unit 1 family inet address 1.1.1.6/32 user@RR3#set lo0 unit 1 family iso address 49.0000.0000.aaaa.0006.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@RR3#set policy-statement add-noexport term 1 then community add noexport user@RR3#set policy-statement allow-lo0 term 1 from interface lo0.1 user@RR3#set policy-statement allow-lo0 term 1 then accept user@RR3#set policy-statement allow-lo0 term 2 then reject user@RR3#set policy-statement export-inet3 term 1 from rib inet.3 user@RR3#set policy-statement export-inet3 term 1 then accept user@RR3#set policy-statement export-inet3 term 2 then reject user@RR3#set policy-statement pplb then load-balance per-packet user@RR3#set community noexport members no-export user@RR3#set community noexport members no-advertise
应用按流量负载平衡策略以启用流量保护。
[edit routing-options] user@RR3#set forwarding-table export pplb user@RR3#set interface-routes rib-group inet inet0to3 user@RR3#set router-id 1.1.1.6 user@RR3#set autonomous-system 1 user@RR3#set rib-groups inet0to3 import-rib inet.0 user@RR3#set rib-groups inet0to3 import-rib inet.3 user@RR3#set rib-groups inet0to3 import-policy allow-lo0 user@RR3#set rib-groups inet3to0 import-rib inet.3 user@RR3#set rib-groups inet3to0 import-rib inet.0 user@RR3#set rib-groups inet3to0 import-policy add-noexport
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@RR3#set isis level 1 disable user@RR3#set isis interface all user@RR3#set isis export allow-lo0 user@RR3#set isis topologies ipv6-unicast user@RR3#set rsvp interface all user@RR3#set ldp interface all user@RR3#set mpls interface all
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols] user@RR3#set bgp path-selection external-router-id user@RR3#set bgp group toAs1BNs type internal user@RR3#set bgp group toAs1BNs family inet labeled-unicast rib-group inet3to0 user@RR3#set bgp group toAs1BNs family inet labeled-unicast add-path receive user@RR3#set bgp group toAs1BNs family inet labeled-unicast add-path send path-count 4 user@RR3#set bgp group toAs1BNs family inet labeled-unicast rib inet.3 user@RR3#set bgp group toAs1BNs export export-inet3 user@RR3#set bgp group toAs1BNs neighbor 1.1.1.3 user@RR3#set bgp group toAs1BNs neighbor 1.1.1.4 user@RR3#set bgp group toAs1BNs neighbor 1.1.1.2 user@RR3#set bgp group toAs1BNs neighbor 1.1.1.1 user@RR3#set bgp traceoptions file bgp.log user@RR3#set bgp traceoptions file size 100m user@RR3#set bgp traceoptions flag state detail user@RR3#set bgp traceoptions flag policy user@RR3#set bgp local-address 1.1.1.6 user@RR3#set bgp cluster 1.1.1.6
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/2 {
description RR3-to-P3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.35/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 1 {
family inet {
address 1.1.1.6/32;
}
family iso {
address 49.0000.0000.aaaa.0006.00;
}
}
}
}
policy-options {
policy-statement add-noexport {
term 1 {
then {
community add noexport;
}
}
}
policy-statement allow-lo0 {
term 1 {
from interface lo0.1;
then accept;
}
term 2 {
then reject;
}
}
policy-statement export-inet3 {
term 1 {
from rib inet.3;
then accept;
}
term 2 {
then reject;
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
community noexport members [ no-export no-advertise ];
}
routing-options {
forwarding-table {
export pplb;
}
interface-routes {
rib-group inet inet0to3;
}
router-id 1.1.1.6;
autonomous-system 1;
rib-groups {
inet0to3 {
import-rib [ inet.0 inet.3 ];
import-policy allow-lo0;
}
inet3to0 {
import-rib [ inet.3 inet.0 ];
import-policy add-noexport;
}
}
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
bgp {
path-selection external-router-id;
group toAs1BNs {
type internal;
family inet {
labeled-unicast {
rib-group inet3to0;
add-path {
receive;
send {
path-count 4;
}
}
rib {
inet.3;
}
}
}
export export-inet3;
neighbor 1.1.1.3;
neighbor 1.1.1.4;
neighbor 1.1.1.2;
neighbor 1.1.1.1;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
local-address 1.1.1.6;
cluster 1.1.1.6;
}
ldp {
interface all;
}
mpls {
interface all;
}
}
配置 P3 设备
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 P3：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@P3#set ge-0/0/1 description P3-to-ASBR4 user@P3#set ge-0/0/1 vlan-tagging user@P3#set ge-0/0/1 unit 0 vlan-id 100 user@P3#set ge-0/0/1 unit 0 family inet address 192.168.0.33/31 user@P3#set ge-0/0/1 unit 0 family iso user@P3#set ge-0/0/1 unit 0 family mpls user@P3#set ge-0/0/2 description P3-to-RR3 user@P3#set ge-0/0/2 vlan-tagging user@P3#set ge-0/0/2 unit 0 vlan-id 100 user@P3#set ge-0/0/2 unit 0 family inet address 192.168.0.34/31 user@P3#set ge-0/0/2 unit 0 family iso user@P3#set ge-0/0/2 unit 0 family mpls user@P3#set ge-0/0/3 description P3-to-PE2 user@P3#set ge-0/0/3 vlan-tagging user@P3#set ge-0/0/3 unit 0 vlan-id 100 user@P3#set ge-0/0/3 unit 0 family inet address 192.168.0.36/31 user@P3#set ge-0/0/3 unit 0 family iso user@P3#set ge-0/0/3 unit 0 family mpls user@P3#set ge-0/0/4 description P3-to-ASBR3 user@P3#set ge-0/0/4 vlan-tagging user@P3#set ge-0/0/4 unit 0 vlan-id 100 user@P3#set ge-0/0/4 unit 0 family inet address 192.168.0.31/31 user@P3#set ge-0/0/4 unit 0 family iso user@P3#set ge-0/0/4 unit 0 family mpls user@P3#set ge-0/0/5 description P3-to-PE3 user@P3#set ge-0/0/5 vlan-tagging user@P3#set ge-0/0/5 unit 0 vlan-id 100 user@P3#set ge-0/0/5 unit 0 family inet address 192.168.0.38/31 user@P3#set ge-0/0/5 unit 0 family iso user@P3#set ge-0/0/5 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@P3#set lo0 unit 0 family inet address 1.1.1.5/32 user@P3#set lo0 unit 0 family iso address 49.0000.0000.aaaa.0005.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@P3#set policy-statement allow-lo0 term 1 from interface lo0.0 user@P3#set policy-statement allow-lo0 term 1 then accept user@P3#set policy-statement allow-lo0 term 2 then reject
配置路由选项。
[edit routing-options] user@P3#set router-id 1.1.1.5
在接口上配置 ISIS、RSVP、MPLS 和 LDP 协议。
[edit protocols] user@P3#set isis level 1 disable user@P3#set isis interface all user@P3#set isis export allow-lo0 user@P3#set isis topologies ipv6-unicast user@P3#set rsvp interface all user@P3#set ldp interface all user@P3#set mpls interface all
成果
在配置模式下，输入 、 和 show interfaces 命令 show policy-options 以确认 show routing-options 您的 show protocols 配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description P3-to-ASBR4;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.33/31;
}
family iso;
family mpls;
}
}
ge-0/0/2 {
description P3-to-RR3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.34/31;
}
family iso;
family mpls;
}
}
ge-0/0/3 {
description P3-to-PE2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.36/31;
}
family iso;
family mpls;
}
}
ge-0/0/4 {
description P3-to-ASBR3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.31/31;
}
family iso;
family mpls;
}
}
ge-0/0/5 {
description P3-to-PE3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.38/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 1.1.1.5/32;
}
family iso {
address 49.0000.0000.aaaa.0005.00;
}
}
}
}
policy-options {
policy-statement allow-lo0 {
term 1 {
from interface lo0.0;
then accept;
}
term 2 {
then reject;
}
}
}
routing-options {
router-id 1.1.1.5;
}
protocols {
isis {
level 1 disable;
interface all;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface all;
}
ldp {
interface all;
}
mpls {
interface all;
}
}
配置 PE2
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 PE2：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@PE2#set ge-0/0/1 description PE2-to-CE2-Link1 user@PE2#set ge-0/0/1 vlan-tagging user@PE2#set ge-0/0/1 unit 0 vlan-id 100 user@PE2#set ge-0/0/1 unit 0 family inet address 192.168.0.40/31 user@PE2#set ge-0/0/2 description PE2-to-CE2-Link2 user@PE2#set ge-0/0/2 vlan-tagging user@PE2#set ge-0/0/2 unit 0 vlan-id 100 user@PE2#set ge-0/0/2 unit 0 family inet address 192.168.0.42/31 user@PE2#set ge-0/0/3 description PE2-to-P3 user@PE2#set ge-0/0/3 vlan-tagging user@PE2#set ge-0/0/3 unit 0 vlan-id 100 user@PE2#set ge-0/0/3 unit 0 family inet address 192.168.0.37/31 user@PE2#set ge-0/0/3 unit 0 family iso user@PE2#set ge-0/0/3 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@PE2#set lo0 unit 1 family inet address 1.1.1.1/32 user@PE2#set lo0 unit 1 family iso address 49.0000.0000.aaaa.0001.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@PE2#set policy-statement add-noexport term 1 then community add noexport user@PE2#set policy-statement allow-lo0 term 1 from interface lo0.1 user@PE2#set policy-statement allow-lo0 term 1 then accept user@PE2#set policy-statement allow-lo0 term 2 then reject user@PE2#set policy-statement export-inet3 term 1 from rib inet.3 user@PE2#set policy-statement export-inet3 term 1 then accept user@PE2#set policy-statement export-inet3 term 2 then reject user@PE2#set policy-statement nhs term 1 from protocol bgp user@PE2#set policy-statement nhs term 1 then metric add 0 user@PE2#set policy-statement nhs term 1 then local-preference 200 user@PE2#set policy-statement nhs term 1 then next-hop self user@PE2#set policy-statement nhs term 1 then accept user@PE2#set policy-statement pplb then load-balance per-packet user@PE2#set policy-statement vrf-export-red term 1 then community add leak2red user@PE2#set policy-statement vrf-export-red term 1 then accept user@PE2#set policy-statement vrf-import-red term 1 from community leak2red user@PE2#set policy-statement vrf-import-red term 1 then accept user@PE2#set community leak2red members target:100:100 user@PE2#set community noexport members no-export user@PE2#set community noexport members no-advertise
配置3层 VPN 路由实例以提供客户服务。
[edit routing-instances] user@PE2#set red protocols bgp group toCE2 peer-as 3 user@PE2#set red protocols bgp group toCE2 neighbor 192.168.0.43 user@PE2#set red instance-type vrf user@PE2#set red interface ge-0/0/2.0 user@PE2#set red vrf-import vrf-import-red user@PE2#set red vrf-export vrf-export-red
配置解析器筋导入策略和解析肋条为在策略中指定的选定第3层 VPN 前缀启用扩展的层次结构 nexthop 结构。
[edit routing-options] user@PE2#set route-distinguisher-id 1.1.1.1 user@PE2#set forwarding-table export pplb user@PE2#set interface-routes rib-group inet inet0to3 user@PE2#set router-id 1.1.1.1 user@PE2#set autonomous-system 1 user@PE2#set rib-groups inet0to3 import-rib inet.0 user@PE2#set rib-groups inet0to3 import-rib inet.3 user@PE2#set rib-groups inet0to3 import-policy allow-lo0 user@PE2#set rib-groups inet3to0 import-rib inet.3 user@PE2#set rib-groups inet3to0 import-rib inet.0 user@PE2#set rib-groups inet3to0 import-policy add-noexport
在接口上配置 ISIS、RSVP、LDP MPLS协议。
[edit protocols] user@PE2#set isis level 1 disable user@PE2#set isis interface ge-0/0/3.0 user@PE2#set isis export allow-lo0 user@PE2#set isis topologies ipv6-unicast user@PE2#set rsvp interface ge-0/0/3.0 user@PE2#set ldp interface ge-0/0/3.0 user@PE2#set mpls interface ge-0/0/3.0
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols bgp] user@PE2#set bgp path-selection external-router-id user@PE2#set bgp group toAs3-1 peer-as 3 user@PE2#set bgp group toAs3-1 neighbor 192.168.0.41 user@PE2#set bgp group toAs1RR type internal user@PE2#set bgp group toAs1RR local-address 1.1.1.1 user@PE2#set bgp group toAs1RR advertise-external user@PE2#set bgp group toAs1RR family inet labeled-unicast rib-group inet3to0 user@PE2#set bgp group toAs1RR family inet labeled-unicast add-path receive user@PE2#set bgp group toAs1RR family inet labeled-unicast add-path send path-count 4 user@PE2#set bgp group toAs1RR family inet labeled-unicast rib inet.3 user@PE2#set bgp group toAs1RR family inet6-vpn unicast user@PE2#set bgp group toAs1RR export nhs user@PE2#set bgp group toAs1RR export export-inet3 user@PE2#set bgp group toAs1RR neighbor 1.1.1.6 user@PE2#set bgp group toAs2PEs multihop no-nexthop-change user@PE2#set bgp group toAs2PEs local-address 1.1.1.1 user@PE2#set bgp group toAs2PEs family inet unicast user@PE2#set bgp group toAs2PEs family inet-vpn unicast user@PE2#set bgp group toAs2PEs family inet6 unicast user@PE2#set bgp group toAs2PEs family inet6-vpn unicast user@PE2#set bgp group toAs2PEs export nhs user@PE2#set bgp group toAs2PEs peer-as 2 user@PE2#set bgp group toAs2PEs neighbor 2.2.2.5 user@PE2#set bgp group toAs2PEs vpn-apply-export user@PE2#set bgp traceoptions file bgp.log user@PE2#set bgp traceoptions file size 100m user@PE2#set bgp traceoptions flag state detail user@PE2#set bgp traceoptions flag policy
成果
从show chassis配置模式，输入、 show interfacesshow policy-optionsshow routing-instancesshow routing-options、、、和show protocols命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description PE2-to-CE2-Link1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.40/31;
}
}
}
ge-0/0/2 {
description PE2-to-CE2-Link2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.42/31;
}
}
}
ge-0/0/3 {
description PE2-to-P3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.37/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 1 {
family inet {
address 1.1.1.1/32;
}
family iso {
address 49.0000.0000.aaaa.0001.00;
}
}
}
}
policy-options {
policy-statement add-noexport {
term 1 {
then {
community add noexport;
}
}
}
policy-statement allow-lo0 {
term 1 {
from interface lo0.1;
then accept;
}
term 2 {
then reject;
}
}
policy-statement export-inet3 {
term 1 {
from rib inet.3;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
metric add 0;
local-preference 200;
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
policy-statement vrf-export-red {
term 1 {
then {
community add leak2red;
accept;
}
}
}
policy-statement vrf-import-red {
term 1 {
from community leak2red;
then accept;
}
}
community leak2red members target:100:100;
community noexport members [ no-export no-advertise ];
}
routing-instances {
red {
protocols {
bgp {
group toCE2 {
peer-as 3;
neighbor 192.168.0.43;
}
}
}
instance-type vrf;
interface ge-0/0/2.0;
vrf-import vrf-import-red;
vrf-export vrf-export-red;
}
}
routing-options {
route-distinguisher-id 1.1.1.1;
forwarding-table {
export pplb;
}
interface-routes {
rib-group inet inet0to3;
}
router-id 1.1.1.1;
autonomous-system 1;
rib-groups {
inet0to3 {
import-rib [ inet.0 inet.3 ];
import-policy allow-lo0;
}
inet3to0 {
import-rib [ inet.3 inet.0 ];
import-policy add-noexport;
}
}
}
protocols {
isis {
level 1 disable;
interface ge-0/0/3.0;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface ge-0/0/3.0;
}
bgp {
path-selection external-router-id;
group toAs3-1 {
peer-as 3;
neighbor 192.168.0.41;
}
group toAs1RR {
type internal;
local-address 1.1.1.1;
advertise-external;
family inet {
labeled-unicast {
rib-group inet3to0;
add-path {
receive;
send {
path-count 4;
}
}
rib {
inet.3;
}
}
}
family inet6-vpn {
unicast;
}
export [ nhs export-inet3 ];
neighbor 1.1.1.6;
}
group toAs2PEs {
multihop {
no-nexthop-change;
}
local-address 1.1.1.1;
family inet {
unicast;
}
family inet-vpn {
unicast;
}
family inet6 {
unicast;
}
family inet6-vpn {
unicast;
}
export nhs;
peer-as 2;
neighbor 2.2.2.5;
vpn-apply-export;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface ge-0/0/3.0;
}
mpls {
interface ge-0/0/3.0;
}
}
配置 PE3
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 PE3：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@PE3#set ge-0/0/3 description PE3-to-CE2-Link1 user@PE3#set ge-0/0/3 vlan-tagging user@PE3#set ge-0/0/3 unit 0 vlan-id 100 user@PE3#set ge-0/0/3 unit 0 family inet address 192.168.0.44/31 user@PE3#set ge-0/0/4 description PE3-to-CE2-Link2 user@PE3#set ge-0/0/4 vlan-tagging user@PE3#set ge-0/0/4 unit 0 vlan-id 100 user@PE3#set ge-0/0/4 unit 0 family inet address 192.168.0.46/31 user@PE3#set ge-0/0/5 description PE3-to-P3 user@PE3#set ge-0/0/5 vlan-tagging user@PE3#set ge-0/0/5 unit 0 vlan-id 100 user@PE3#set ge-0/0/5 unit 0 family inet address 192.168.0.39/31 user@PE3#set ge-0/0/5 unit 0 family iso user@PE3#set ge-0/0/5 unit 0 family mpls
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@PE3#set lo0 unit 1 family inet address 1.1.1.2/32 user@PE3#set lo0 unit 1 family iso address 49.0000.0000.aaaa.0002.00
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@PE3#set policy-statement add-noexport term 1 then community add noexport user@PE3#set policy-statement allow-lo0 term 1 from interface lo0.1 user@PE3#set policy-statement allow-lo0 term 1 then accept user@PE3#set policy-statement allow-lo0 term 2 then reject user@PE3#set policy-statement export-inet3 term 1 from rib inet.3 user@PE3#set policy-statement export-inet3 term 1 then accept user@PE3#set policy-statement export-inet3 term 2 then reject user@PE3#set policy-statement nhs term 1 from protocol bgp user@PE3#set policy-statement nhs term 1 then metric add 0 user@PE3#set policy-statement nhs term 1 then local-preference 200 user@PE3#set policy-statement nhs term 1 then next-hop self user@PE3#set policy-statement nhs term 1 then accept user@PE3#set policy-statement pplb then load-balance per-packet user@PE3#set policy-statement vrf-export-red term 1 then community add leak2red user@PE3#set policy-statement vrf-export-red term 1 then accept user@PE3#set policy-statement vrf-import-red term 1 from community leak2red user@PE3#set policy-statement vrf-import-red term 1 then accept user@PE3#set community leak2red members target:100:100 user@PE3#set community noexport members no-export user@PE3#set community noexport members no-advertise
配置3层 VPN 路由实例以提供客户服务。
[edit routing-instances] user@PE3#set red protocols bgp group toCE2 peer-as 3 user@PE3#set red protocols bgp group toCE2 neighbor 192.168.0.47 user@PE3#set red instance-type vrf user@PE3#set red interface ge-0/0/4.0 user@PE3#set red vrf-import vrf-import-red user@PE3#set red vrf-export vrf-export-red
配置解析器筋导入策略和解析肋条为在策略中指定的选定第3层 VPN 前缀启用扩展的层次结构 nexthop 结构。
[edit routing-options] user@PE3#set route-distinguisher-id 1.1.1.2 user@PE3#set forwarding-table export pplb user@PE3#set interface-routes rib-group inet inet0to3 user@PE3#set router-id 1.1.1.2 user@PE3#set autonomous-system 1 user@PE3#set rib-groups inet0to3 import-rib inet.0 user@PE3#set rib-groups inet0to3 import-rib inet.3 user@PE3#set rib-groups inet0to3 import-policy allow-lo0 user@PE3#set rib-groups inet3to0 import-rib inet.3 user@PE3#set rib-groups inet3to0 import-rib inet.0 user@PE3#set rib-groups inet3to0 import-policy add-noexport
在接口上配置 ISIS、RSVP、LDP MPLS协议。
[edit protocols] user@PE3#set isis level 1 disable user@PE3#set isis interface ge-0/0/5.0 user@PE3#set isis export allow-lo0 user@PE3#set isis topologies ipv6-unicast user@PE3#set rsvp interface ge-0/0/5.0 user@PE3#set ldp interface ge-0/0/5.0 user@PE3#set mpls interface ge-0/0/5.0
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols bgp] user@PE3#set bgp path-selection external-router-id user@PE3#set bgp group toAs3 peer-as 3 user@PE3#set bgp group toAs3 neighbor 192.168.0.45 user@PE3#set bgp group toAs1RR type internal user@PE3#set bgp group toAs1RR local-address 1.1.1.2 user@PE3#set bgp group toAs1RR advertise-external user@PE3#set bgp group toAs1RR family inet labeled-unicast rib-group inet3to0 user@PE3#set bgp group toAs1RR family inet labeled-unicast rib inet.3 user@PE3#set bgp group toAs1RR export nhs user@PE3#set bgp group toAs1RR export export-inet3 user@PE3#set bgp group toAs1RR neighbor 1.1.1.6 user@PE3#set bgp group toAs2PEs multihop no-nexthop-change user@PE3#set bgp group toAs2PEs local-address 1.1.1.2 user@PE3#set bgp group toAs2PEs family inet unicast user@PE3#set bgp group toAs2PEs family inet-vpn unicast user@PE3#set bgp group toAs2PEs family inet6 unicast user@PE3#set bgp group toAs2PEs family inet6-vpn unicast user@PE3#set bgp group toAs2PEs export nhs user@PE3#set bgp group toAs2PEs peer-as 2 user@PE3#set bgp group toAs2PEs neighbor 2.2.2.5 user@PE3#set bgp group toAs2PEs vpn-apply-export user@PE3#set bgp traceoptions file bgp.log user@PE3#set bgp traceoptions file size 100m user@PE3#set bgp traceoptions flag state detail user@PE3#set bgp traceoptions flag policy
成果
从show chassis配置模式，输入、 show interfacesshow policy-optionsshow routing-instancesshow routing-options、、、和show protocols命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/3 {
description PE3-to-CE2-Link1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.44/31;
}
}
}
ge-0/0/4 {
description PE3-to-CE2-Link2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.46/31;
}
}
}
ge-0/0/5 {
description PE3-to-P3;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.39/31;
}
family iso;
family mpls;
}
}
lo0 {
unit 1 {
family inet {
address 1.1.1.2/32;
}
family iso {
address 49.0000.0000.aaaa.0002.00;
}
}
}
}
policy-options {
policy-statement add-noexport {
term 1 {
then {
community add noexport;
}
}
}
policy-statement allow-lo0 {
term 1 {
from interface lo0.1;
then accept;
}
term 2 {
then reject;
}
}
policy-statement export-inet3 {
term 1 {
from rib inet.3;
then accept;
}
term 2 {
then reject;
}
}
policy-statement nhs {
term 1 {
from protocol bgp;
then {
metric add 0;
local-preference 200;
next-hop self;
accept;
}
}
}
policy-statement pplb {
then {
load-balance per-packet;
}
}
policy-statement vrf-export-red {
term 1 {
then {
community add leak2red;
accept;
}
}
}
policy-statement vrf-import-red {
term 1 {
from community leak2red;
then accept;
}
}
community leak2red members target:100:100;
community noexport members [ no-export no-advertise ];
}
routing-instances {
red {
protocols {
bgp {
group toCE2 {
peer-as 3;
neighbor 192.168.0.47;
}
}
}
instance-type vrf;
interface ge-0/0/4.0;
vrf-import vrf-import-red;
vrf-export vrf-export-red;
}
}
routing-options {
route-distinguisher-id 1.1.1.2;
forwarding-table {
export pplb;
}
interface-routes {
rib-group inet inet0to3;
}
router-id 1.1.1.2;
autonomous-system 1;
rib-groups {
inet0to3 {
import-rib [ inet.0 inet.3 ];
import-policy allow-lo0;
}
inet3to0 {
import-rib [ inet.3 inet.0 ];
import-policy add-noexport;
}
}
}
protocols {
isis {
level 1 disable;
interface ge-0/0/5.0;
export allow-lo0;
topologies ipv6-unicast;
}
rsvp {
interface ge-0/0/5.0;
}
bgp {
path-selection external-router-id;
group toAs3 {
peer-as 3;
neighbor 192.168.0.45;
}
group toAs1RR {
type internal;
local-address 1.1.1.2;
advertise-external;
family inet {
labeled-unicast {
rib-group inet3to0;
rib {
inet.3;
}
}
}
export [ nhs export-inet3 ];
neighbor 1.1.1.6;
}
group toAs2PEs {
multihop {
no-nexthop-change;
}
local-address 1.1.1.2;
family inet {
unicast;
}
family inet-vpn {
unicast;
}
family inet6 {
unicast;
}
family inet6-vpn {
unicast;
}
export nhs;
peer-as 2;
neighbor 2.2.2.5;
vpn-apply-export;
}
traceoptions {
file bgp.log size 100m;
flag state detail;
flag policy;
}
}
ldp {
interface ge-0/0/5.0;
}
mpls {
interface ge-0/0/5.0;
}
}
配置 CE2
分步过程
下面的示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 CLI 用户指南 中的 在配置模式下CLI 编辑器。
要配置设备 CE2：
配置接口以启用 IP 和 MPLS 传输。
[edit interfaces] user@CE2#set ge-0/0/1 description CE2-to-PE2-Link1 user@CE2#set ge-0/0/1 vlan-tagging user@CE2#set ge-0/0/1 unit 0 vlan-id 100 user@CE2#set ge-0/0/1 unit 0 family inet address 192.168.0.41/31 user@CE2#set ge-0/0/2 description CE2-to-PE2-Link2 user@CE2#set ge-0/0/2 vlan-tagging user@CE2#set ge-0/0/2 unit 0 vlan-id 100 user@CE2#set ge-0/0/2 unit 0 family inet address 192.168.0.43/31 user@CE2#set ge-0/0/3 description CE2-to-PE3-Link1 user@CE2#set ge-0/0/3 vlan-tagging user@CE2#set ge-0/0/3 unit 0 vlan-id 100 user@CE2#set ge-0/0/3 unit 0 family inet address 192.168.0.45/31 user@CE2#set ge-0/0/4 description CE2-to-PE3-Link2 user@CE2#set ge-0/0/4 vlan-tagging user@CE2#set ge-0/0/4 unit 0 vlan-id 100 user@CE2#set ge-0/0/4 unit 0 family inet address 192.168.0.47/31
配置回环接口，将其用作 LDP 和会话的路由器 ID 和BGP接口。
[edit interfaces] user@CE2#set lo0 unit 0 family inet address 3.3.3.3/32
配置多路径解析策略以将分层 multipaths 安装到 PFE 中。
[edit policy-options] user@CE2#set policy-statement nhs term 1 from interface lo0.0 user@CE2#set policy-statement nhs term 1 then metric 50 user@CE2#set policy-statement nhs term 1 then next-hop self user@CE2#set policy-statement nhs term 1 then accept user@CE2#set policy-statement nhsMED100 term 1 from interface lo0.0 user@CE2#set policy-statement nhsMED100 term 1 then metric 100 user@CE2#set policy-statement nhsMED100 term 1 then next-hop self user@CE2#set policy-statement nhsMED100 term 1 then accept user@CE2#set community map2bronze members 100:200 user@CE2#set community map2gold members 100:100 user@CE2#set community map2gold_bronze_plain members 300:400
配置路由选项。
[edit routing-options] user@CE2#set router-id 3.3.3.3 user@CE2#set autonomous-system 3
将BGP单播作为已标记单播前缀交换环路 IP BGP。
[edit protocols bgp] user@CE2#set bgp path-selection external-router-id user@CE2#set bgp group toAs1Internet export nhs user@CE2#set bgp group toAs1Internet peer-as 1 user@CE2#set bgp group toAs1Internet neighbor 192.168.0.40 user@CE2#set bgp group toAs1Internet neighbor 192.168.0.44 export nhsMED100 user@CE2#set bgp group toAs1L3VPN export nhs user@CE2#set bgp group toAs1L3VPN peer-as 1 user@CE2#set bgp group toAs1L3VPN neighbor 192.168.0.46 user@CE2#set bgp group toAs1L3VPN neighbor 192.168.0.42 export nhsMED100
成果
从配置模式， show interfaces输入、 show policy-optionsshow routing-options、和show protocols命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
interfaces {
ge-0/0/1 {
description CE2-to-PE2-Link1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.41/31;
}
}
}
ge-0/0/2 {
description CE2-to-PE2-Link2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.43/31;
}
}
}
ge-0/0/3 {
description CE2-to-PE3-Link1;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.45/31;
}
}
}
ge-0/0/4 {
description CE2-to-PE3-Link2;
vlan-tagging;
unit 0 {
vlan-id 100;
family inet {
address 192.168.0.47/31;
}
}
}
lo0 {
unit 0 {
family inet {
address 3.3.3.3/32;
}
}
}
}
policy-options {
policy-statement nhs {
term 1 {
from interface lo0.0;
then {
metric 50;
next-hop self;
accept;
}
}
}
policy-statement nhsMED100 {
term 1 {
from interface lo0.0;
then {
metric 100;
next-hop self;
accept;
}
}
}
community map2bronze members 100:200;
community map2gold members 100:100;
community map2gold_bronze_plain members 300:400;
}
routing-options {
router-id 3.3.3.3;
autonomous-system 3;
}
protocols {
bgp {
path-selection external-router-id;
group toAs1Internet {
export nhs;
peer-as 1;
neighbor 192.168.0.40;
neighbor 192.168.0.44 {
export nhsMED100;
}
}
group toAs1L3VPN {
export nhs;
peer-as 1;
neighbor 192.168.0.46;
neighbor 192.168.0.42 {
export nhsMED100;
}
}
}
}
针对
确认配置是否正常工作。
验证下一个hops是否已解析
用途
验证 PE2 和 PE3 下一个hops是否在 PE1 中解析。
行动
从操作模式运行show route forwarding-table destination命令。
user@PE1> show route forwarding-table destination 3.3.3.3 extensive table default | match Weight
Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x4000
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
user@PE1> show route forwarding-table destination 3.3.3.3 extensive table red | match Weight
Weight: 0x1
Weight: 0x1
Next-hop interface: ge-0/0/3.0 Weight: 0x1
Weight: 0x4000
Weight: 0x4000
Next-hop interface: ge-0/0/3.0 Weight: 0x4000
含义
您可查看权重 0x1 以及 0x4000 主要和备份下一个hops。
验证路由表中的下一个hop条目
用途
验证 PE1 中的活动下一个hop路由条目。
行动
从操作模式运行show route extensive expanded-nh命令。
user@PE1> show route 3.3.3.3 extensive expanded-nh
inet.0: 36 destinations, 65 routes (36 active, 0 holddown, 0 hidden)
3.3.3.3/32 (2 entries, 1 announced)
Installed-nexthop:
List (0xd6ba4b8) Index:1048626
Indr (0xc593cac) 1.1.1.1
Krt_inh (0xcc14684) Index:1048614
List (0xc4cf7b4) Index:1048613
Frr_inh (0xc592730) Index:1048608
Chain (0xc59334c) Index:651 Push 300368
Router (0xc58ea40) Index:628 192.168.0.5 Push 299808
Frr_inh (0xc592604) Index:1048609
Chain (0xc5924d8) Index:649 Push 300384
Router (0xc58ea40) Index:628 192.168.0.5 Push 299808
Frr_inh (0xc592154) Index:1048611
Chain (0xc591bdc) Index:654 Push 300368
Router (0xc58ebd0) Index:629 192.168.0.5 Push 299824
Frr_inh (0xc5921b8) Index:1048612
Chain (0xc591a4c) Index:655 Push 300384
Router (0xc58ebd0) Index:629 192.168.0.5 Push 299824
Indr (0xc593ab8) 1.1.1.2
Krt_inh (0xcc14f84) Index:1048624
List (0xc4d0074) Index:1048623
Frr_inh (0xc5939f0) Index:1048619
Chain (0xc592ab4) Index:638 Push 300144
Router (0xc58ea40) Index:628 192.168.0.5 Push 299808
Frr_inh (0xc593a54) Index:1048620
Chain (0xc591efc) Index:637 Push 300160
Router (0xc58ea40) Index:628 192.168.0.5 Push 299808
Frr_inh (0xc59172c) Index:1048589
Chain (0xc5903a4) Index:640 Push 300144
Router (0xc58ebd0) Index:629 192.168.0.5 Push 299824
Frr_inh (0xc59159c) Index:1048590
Chain (0xc58fa44) Index:639 Push 300160
Router (0xc58ebd0) Index:629 192.168.0.5 Push 299824
TSI:
<SNIP>
Protocol next hop: 1.1.1.1
Indirect next hop: 0xcc14684 1048614 INH Session ID: 0x146 Weight 0x1
Protocol next hop: 1.1.1.2
Indirect next hop: 0xcc14f84 1048624 INH Session ID: 0x145 Weight 0x4000
State: >Active Ext>
Local AS: 2 Peer AS: 1
<SNIP>
Indirect next hops: 2
Protocol next hop: 1.1.1.1 Metric: 1
Indirect next hop: 0xcc14684 1048614 INH Session ID: 0x146 Weight 0x1
Indirect path forwarding next hops (Merged): 4
<SNIP>
Protocol next hop: 1.1.1.2 Metric: 1
Indirect next hop: 0xcc14f84 1048624 INH Session ID: 0x145 Weight 0x4000
Indirect path forwarding next hops (Merged): 4含义
您可查看权重以及 0x10x4000 主要和备份下一个hops。
BGP L2VPN 和 VPLS 概述的脂肪伪线支持
伪线是一种2层电路或服务，可在 MPLS 数据包交换网络（PSN）上模拟电信服务的基本属性，例如 T1 线路。伪线旨在仅提供根据所需的给定服务定义的弹性要求来模拟电线所需的最低功能。
在 MPLS 网络中，如 draft-keyupdate-l2vpn-fat-pw-bgp中所述的伪线流标签的流感知传输 （FAT） 用于第 2 层虚拟专用网络 （L2VPN） 和虚拟专用 LAN 服务 （VPLS） 中跨 BGP 信号伪线的流量负载平衡。
FAT 流标签仅在标签边缘路由器（LERs）上配置。这会导致传输路由器或标签交换路由器（Lsr）跨相同成本的多路径（ECMP）路径或链路聚合组（lag）执行 MPLS 数据包的负载平衡，而无需深度包检测有效负载。
FAT 流标签可用于 VPWS 和 VPLS 伪线的 LDP 信号转发等价类（FEC 128 和 FEC 129）伪线。接口参数（子 TLV）用于 FEC 128 和 FEC 129 伪线。为 LDP 定义的子 TLV 包含传输（T）和接收（R）位。T 位通告推入流标签的能力。R 位通告弹出流标签的能力。默认情况下，任何这些伪线的提供商边缘（PE）路由器的信号传输行为都是通告设置为0的标签中的 T 和 R 位。
flow-label-transmit和flow-label-receive配置语句提供在子 TLV 字段中将 T 位和 R 位通告设置为1的功能，这是 LDP 标签映射消息的 FEC 的接口参数的一部分。您可以使用这些语句来控制将标签的推送到控制平面中路由对等方的伪线，以便 L2VPN 和 VPLS 等 BGP 信号网络。
另请参阅
配置 FAT 伪线对 BGP L2VPN 到负载平衡 MPLS 流量的支持
流感知传输（FAT）或流标签受 BGP 信号伪线，例如 L2VPN 仅在标签边缘路由器（LERs）上配置。这使得传输路由器或标签交换路由器（Lsr）能够跨同等成本的多路径路径（ECMP）或链路聚合组（lag）执行 MPLS 数据包的负载平衡，而无需深度包检测负载。FAT 伪线或流标签可用于具有转发同等类（FEC128 和 FEC129）的 LDP 信号 L2 VPN，而对于点到点或点到多点第 2 层服务，对 BGP 信号伪线的支持扩展。
在将 BGP L2VPN 的 FAT 伪线支持配置为负载平衡 MPLS 流量之前：
配置设备接口并在所有接口上启用 MPLS。
配置 RSVP。
将 MPLS 和 LSP 配置为远程 PE 路由器。
配置 BGP 和 OSPF。
要将 BGP L2VPN 的 FAT 伪线支持配置为负载平衡 MPLS 流量，必须执行以下操作：
另请参阅
示例：配置 FAT 伪线对 BGP L2VPN 到负载平衡 MPLS 流量的支持
此示例演示如何实现 BGP L2VPN 的 FAT 伪线支持，以帮助平衡 MPLS 流量。
要求
此示例使用以下硬件和软件组件：
五个 MX 系列路由器
在所有设备上运行 Junos OS Release 16.1 或更高版本
在为 BGP L2VPN 配置 FAT 伪线支持之前，请确保配置了路由和信号协议。
概述
Junos OS 允许 BGP 信号伪线（如 L2VPN）支持的流感知传输（FAT）流标签仅在标签边缘路由器（LERs）上配置。这会导致传输路由器或标签交换路由器（Lsr）跨相同成本的多路径（ECMP）路径或链路聚合组（lag）执行 MPLS 数据包的负载平衡，而无需深度包检测负载。FAT 流标签可用于 VPWS 和 VPLS 伪线的 LDP 信号转发等价类（FEC 128 和 FEC 129）伪线。
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后从commit配置模式进入。
CE1
set interfaces ge-0/0/0 vlan-tagging set interfaces ge-0/0/0 unit 600 vlan-id 600 set interfaces ge-0/0/0 unit 600 family inet address 10.1.1.1/24 set interfaces lo0 unit 0 family inet address 10.255.255.8/32
PE1
set interfaces ge-0/0/0 vlan-tagging set interfaces ge-0/0/0 mtu 1600 set interfaces ge-0/0/0 encapsulation vlan-ccc set interfaces ge-0/0/0 unit 300 encapsulation vlan-ccc set interfaces ge-0/0/0 unit 300 vlan-id 600 set interfaces ge-0/0/0 unit 600 encapsulation vlan-vpls set interfaces ge-0/0/0 unit 600 vlan-id 600 set interfaces ge-0/0/0 unit 600 family vpls set interfaces ge-0/0/1 unit 0 family inet address 1.0.0.1/24 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.255.1/32 set routing-options nonstop-routing set routing-options router-id 10.255.255.1 set routing-options autonomous-system 100 set routing-options forwarding-table export exp-to-frwd set protocols rsvp interface all set protocols rsvp interface ge-0/0/1.0 set protocols rsvp interface lo0.0 set protocols mpls label-switched-path to-pe2 to 10.255.255.4 set protocols mpls interface ge-0/0/1.0 set protocols bgp group vpls-pe type internal set protocols bgp group vpls-pe local-address 10.255.255.1 set protocols bgp group vpls-pe family l2vpn auto-discovery-only set protocols bgp group vpls-pe family l2vpn signaling set protocols bgp group vpls-pe neighbor 10.255.255.4 set protocols bgp group vpls-pe neighbor 10.255.255.2 set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 set policy-options policy-statement exp-to-frwd term 0 from community vpls-com set policy-options policy-statement exp-to-frwd term 0 then install-nexthop lsp to-pe2 set policy-options policy-statement exp-to-frwd term 0 then accept set policy-options community vpls-com members target:100:100 set routing-instances l2vpn-inst instance-type l2vpn set routing-instances l2vpn-inst interface ge-0/0/0.300 set routing-instances l2vpn-inst route-distinguisher 10.255.255.1:200 set routing-instances l2vpn-inst vrf-target target:100:100 set routing-instances l2vpn-inst protocols l2vpn encapsulation-type ethernet-vlan set routing-instances l2vpn-inst protocols l2vpn site pe1 site-identifier 1 set routing-instances l2vpn-inst protocols l2vpn site pe1 interface ge-0/0/0.300 remote-site-id 2 set routing-instances l2vpn-inst protocols l2vpn flow-label-transmit set routing-instances l2vpn-inst protocols l2vpn flow-label-receive set routing-instances vpl1 instance-type vpls set routing-instances vpl1 interface ge-0/0/0.600 set routing-instances vpl1 route-distinguisher 10.255.255.1:100 set routing-instances vpl1 vrf-target target:100:100 set routing-instances vpl1 protocols vpls site-range 10 set routing-instances vpl1 protocols vpls no-tunnel-services set routing-instances vpl1 protocols vpls site vpl1PE1 site-identifier 1 set routing-instances vpl1 protocols vpls flow-label-transmit set routing-instances vpl1 protocols vpls flow-label-receive
P
set interfaces ge-0/0/0 unit 0 family inet address 1.0.0.2/24 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 unit 0 family inet address 2.0.0.1/24 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.255.2/32 set routing-options router-id 10.255.255.2 set routing-options autonomous-system 100 set protocols rsvp interface ge-0/0/1.0 set protocols rsvp interface ge-0/0/0.0 set protocols rsvp interface lo0.0 set protocols mpls interface ge-0/0/0.0 set protocols mpls interface ge-0/0/1.0 set protocols bgp group vpls-pe type internal set protocols bgp group vpls-pe local-address 10.255.255.2 set protocols bgp group vpls-pe family l2vpn signaling set protocols bgp group vpls-pe neighbor 10.255.255.1 set protocols bgp group vpls-pe neighbor 10.255.255.4 deactivate protocols bgp set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
PE2
set interfaces ge-0/0/0 unit 0 family inet address 2.0.0.2/24 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 mtu 1600 set interfaces ge-0/0/1 encapsulation vlan-ccc set interfaces ge-0/0/1 unit 300 encapsulation vlan-ccc set interfaces ge-0/0/1 unit 300 vlan-id 600 set interfaces ge-0/0/1 unit 600 encapsulation vlan-vpls set interfaces ge-0/0/1 unit 600 vlan-id 600 set interfaces ge-0/0/1 unit 600 family vpls set interfaces lo0 unit 0 family inet address 10.255.255.4/32 set routing-options router-id 10.255.255.4 set routing-options autonomous-system 100 set routing-options forwarding-table export exp-to-frwd set protocols rsvp interface all set protocols rsvp interface ge-0/0/1.0 set protocols rsvp interface lo0.0 set protocols mpls label-switched-path to-pe1 to 10.255.255.1 set protocols mpls interface ge-0/0/0.0 set protocols bgp group vpls-pe type internal set protocols bgp group vpls-pe local-address 10.255.255.4 set protocols bgp group vpls-pe family l2vpn auto-discovery-only set protocols bgp group vpls-pe family l2vpn signaling set protocols bgp group vpls-pe neighbor 10.255.255.1 set protocols bgp group vpls-pe neighbor 10.255.255.2 set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 set policy-options policy-statement exp-to-frwd term 0 from community vpls-com set policy-options policy-statement exp-to-frwd term 0 then install-nexthop lsp to-pe1 set policy-options policy-statement exp-to-frwd term 0 then accept set policy-options community vpls-com members target:100:100 set routing-instances l2vpn-inst instance-type l2vpn set routing-instances l2vpn-inst interface ge-0/0/1.300 set routing-instances l2vpn-inst route-distinguisher 10.255.255.4:200 set routing-instances l2vpn-inst vrf-target target:100:100 set routing-instances l2vpn-inst protocols l2vpn encapsulation-type ethernet-vlan set routing-instances l2vpn-inst protocols l2vpn site pe2 site-identifier 2 set routing-instances l2vpn-inst protocols l2vpn site pe2 interface ge-0/0/1.300 remote-site-id 1 set routing-instances l2vpn-inst protocols l2vpn flow-label-transmit set routing-instances l2vpn-inst protocols l2vpn flow-label-receive set routing-instances vpl1 instance-type vpls set routing-instances vpl1 interface ge-0/0/1.600 set routing-instances vpl1 route-distinguisher 10.255.255.4:100 set routing-instances vpl1 vrf-target target:100:100 set routing-instances vpl1 protocols vpls site-range 10 set routing-instances vpl1 protocols vpls no-tunnel-services set routing-instances vpl1 protocols vpls site vpl1PE2 site-identifier 2 set routing-instances vpl1 protocols vpls flow-label-transmit set routing-instances vpl1 protocols vpls flow-label-receive deactivate routing-instances vpl1
CE2
set interfaces ge-0/0/0 vlan-tagging set interfaces ge-0/0/0 unit 600 vlan-id 600 set interfaces ge-0/0/0 unit 600 family inet address 10.1.1.2/24 set interfaces lo0 unit 0 family inet address 10.255.255.9/32
配置 PE1
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置设备 PE1：
配置接口。
[edit interfaces] user@PE1# set ge-0/0/0 vlan-tagging user@PE1# set ge-0/0/0 mtu 1600 user@PE1# set ge-0/0/0 encapsulation vlan-ccc user@PE1# set ge-0/0/0 unit 300 encapsulation vlan-ccc user@PE1# set ge-0/0/0 unit 300 vlan-id 600 user@PE1# set ge-0/0/0 unit 600 encapsulation vlan-vpls user@PE1# set ge-0/0/0 unit 600 vlan-id 600 user@PE1# set ge-0/0/0 unit 600 family vpls deactivate interfaces ge-0/0/0 unit 600 user@PE1# set ge-0/0/1 unit 0 family inet address 1.0.0.1/24 user@PE1# set ge-0/0/1 unit 0 family mpls user@PE1# set lo0 unit 0 family inet address 10.255.255.1/32
配置不间断路由并配置路由器 ID。
[edit routing-options] user@PE1# set nonstop-routing user@PE1# set router-id 10.255.255.1
配置自治系统（AS）编号，并将策略应用于带有 export 语句的本地路由器的转发表。
[edit routing-options] user@PE1# set autonomous-system 100 user@PE1# set forwarding-table export exp-to-frwd
在接口上配置 RSVP 协议。
[edit protocols rsvp] user@PE1# set interface all user@PE1# set interface ge-0/0/1.0 user@PE1# set interface lo0.0
将标签交换路径属性应用于 MPLS 协议，然后配置接口。
[edit protocols mpls] user@PE1# set label-switched-path to-pe2 to 10.255.255.4 user@PE1# set interface ge-0/0/1.0
定义对等方组，并配置对等方组
vpls-pe的 BGP 会话的本地端地址地址。[edit protocols bgp group vpls-pe] user@PE1# set type internal user@PE1# set local-address 10.255.255.1
在更新中为 NLRIs 配置协议系列的属性。
[edit protocols bgp group vpls-pe] user@PE1# set family l2vpn auto-discovery-only user@PE1# set family l2vpn signaling
为对等方组
vpls-pe配置邻居。[edit protocols bgp group vpls-pe] user@PE1# set neighbor 10.255.255.4 user@PE1# set neighbor 10.255.255.2
配置信息流工程，并配置 OSPF 区域0.0.0.0 的接口。
[edit protocols ospf] user@PE1# set traffic-engineering user@PE1# set area 0.0.0.0 interface lo0.0 passive user@PE1# set area 0.0.0.0 interface ge-0/0/1.0
配置路由策略和 BGP 社区信息。
[edit policy-options] user@PE1# set policy-statement exp-to-fwd term 0 from community vpls-com user@PE1# set policy-statement exp-to-fwd term 0 then install-nexthop lsp to-pe2 user@PE1# set policy-statement exp-to-fwd term 0 then accept user@PE1# set community vpls-com members target:100:100
配置路由实例的类型，并配置接口。
[edit routing-instances l2vpn-inst] user@PE1# set instance-type l2vpn user@PE1# set interface ge-0/0/0.300
为实例
l2vpn-inst配置路由 distinguisher，并配置 VRF 目标社区。[edit routing-instances l2vpn-inst] user@PE1# set route-distinguisher 10.255.255.1:200 user@PE1# set vrf-target target:100:100
配置 L2VPN 协议所需的封装类型。
[edit routing-instances l2vpn-inst protocols l2vpn] user@PE1# set encapsulation-type ethernet-vlan
配置连接到提供商设备的站点。
[edit routing-instances l2vpn-inst protocols l2vpn] user@PE1# set site pe1 site-identifier 1 user@PE1# set site pe1 interface ge-0/0/0.300 remote-site-id 2
配置路由实例的 L2VPN 协议，以提供广告功能，以便将接收方向上的流标签弹出到远程 PE，并提供广告功能以将传输方向中的流标签推入远程 PE。
[edit routing-instances l2vpn-inst protocols l2vpn] user@PE1# set flow-label-transmit user@PE1# set flow-label-receive
配置路由实例的类型，并配置接口。
[edit routing-instances vpl1] user@PE1# set instance-type vpls user@PE1# set interface ge-0/0/0.600
为实例
vp1配置路由 distinguisher，并配置 VRF 目标社区。[edit routing-instances vpl1] user@PE1# set route-distinguisher 10.255.255.1:100 user@PE1# set vrf-target target:100:100
分配 VPLS 域的最大站点标识符。
[edit routing-instances vpl1 protocols vpls] user@PE1# set site-range 10
配置为不使用 VPLS 实例的通道服务，并为连接到提供商设备的站点分配站点标识符。
[edit routing-instances vpl1 protocols vpls] user@PE1# set no-tunnel-services user@PE1# set site vpl1PE1 site-identifier 1
配置路由实例的 VPLS 协议，以提供广告功能，以便将接收方向上的流标签弹出到远程 PE，并提供广告功能以将传输方向中的流标签推入远程 PE。
[edit routing-instances vpl1 protocols vpls] user@PE1# set flow-label-transmit user@PE1# set flow-label-receive
成果
从show interfaces配置模式，输入、 show protocolsshow policy-optionsshow routing-instances、、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@PE1# show interfaces
ge-0/0/0 {
vlan-tagging;
mtu 1600;
encapsulation vlan-ccc;
unit 300 {
encapsulation vlan-ccc;
vlan-id 600;
}
unit 600 {
encapsulation vlan-vpls;
vlan-id 600;
family vpls;
}
}
ge-0/0/1 {
unit 0 {
family inet {
address 1.0.0.1/24;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.255.1/32;
}
}
}
user@PE1# show protocols
rsvp {
interface all;
interface ge-0/0/1.0;
interface lo0.0;
}
mpls {
label-switched-path to-pe2 {
to 10.255.255.4;
}
interface ge-0/0/1.0;
}
bgp {
group vpls-pe {
type internal;
local-address 10.255.255.1;
family l2vpn {
auto-discovery-only;
signaling;
}
neighbor 10.255.255.4;
neighbor 10.255.255.2;
}
}
ospf {
traffic-engineering;
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface ge-0/0/1.0;
}
}
user@PE1# show policy-options
policy-statement exp-to-frwd {
term 0 {
from community vpls-com;
then {
install-nexthop lsp to-pe2;
accept;
}
}
}
community vpls-com members target:100:100;
user@PE1# show routing-instances
l2vpn-inst {
instance-type l2vpn;
interface ge-0/0/0.300;
route-distinguisher 10.255.255.1:200;
vrf-target target:100:100;
protocols {
l2vpn {
encapsulation-type ethernet-vlan;
site pe1 {
site-identifier 1;
interface ge-0/0/0.300 {
remote-site-id 2;
}
}
flow-label-transmit;
flow-label-receive;
}
}
}
vpl1 {
instance-type vpls;
interface ge-0/0/0.600;
route-distinguisher 10.255.255.1:100;
vrf-target target:100:100;
protocols {
vpls {
site-range 10;
no-tunnel-services;
site vpl1PE1 {
site-identifier 1;
}
flow-label-transmit;
flow-label-receive;
}
}
}
user@PE1# show routing-options
nonstop-routing;
router-id 10.255.255.1;
autonomous-system 100;
forwarding-table {
export exp-to-frwd;
}
针对
确认配置是否正常工作。
验证 BGP 摘要信息
用途
验证 BGP 摘要信息。
行动
在操作模式下，输入show bgp summary命令。
user@PE1> show bgp summary
Groups: 1 Peers: 2 Down peers: 1
Table Tot Paths Act Paths Suppressed History Damp State Pending
bgp.l2vpn.0
1 1 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
10.255.255.2 100 0 0 0 0 2d 12:54:28 Active
10.255.255.4 100 8121 8093 0 0 2d 12:53:56 Establ
bgp.l2vpn.0: 1/1/1/0
l2vpn-inst.l2vpn.0: 1/1/1/0
含义
输出显示 BGP 摘要信息。
验证 L2VPN 连接信息
用途
验证第2层 VPN 连接信息。
行动
在操作模式下，运行show l2vpn connections命令以显示第2层 VPN 连接信息。
user@PE1> show l2vpn connections
Layer-2 VPN connections:
Legend for connection status (St)
EI -- encapsulation invalid NC -- interface encapsulation not CCC/TCC/VPLS
EM -- encapsulation mismatch WE -- interface and instance encaps not same
VC-Dn -- Virtual circuit down NP -- interface hardware not present
CM -- control-word mismatch -> -- only outbound connection is up
CN -- circuit not provisioned <- -- only inbound connection is up
OR -- out of range Up -- operational
OL -- no outgoing label Dn -- down
LD -- local site signaled down CF -- call admission control failure
RD -- remote site signaled down SC -- local and remote site ID collision
LN -- local site not designated LM -- local site ID not minimum designated
RN -- remote site not designated RM -- remote site ID not minimum designated
XX -- unknown connection status IL -- no incoming label
MM -- MTU mismatch MI -- Mesh-Group ID not available
BK -- Backup connection ST -- Standby connection
PF -- Profile parse failure PB -- Profile busy
RS -- remote site standby SN -- Static Neighbor
LB -- Local site not best-site RB -- Remote site not best-site
VM -- VLAN ID mismatch
Legend for interface status
Up -- operational
Dn -- down
Instance: l2vpn-inst
Edge protection: Not-Primary
Local site: pe1 (1)
connection-site Type St Time last up # Up trans
2 rmt Up Jun 22 14:46:50 2015 1
Remote PE: 10.255.255.4, Negotiated control-word: Yes (Null)
Incoming label: 800003, Outgoing label: 800002
Local interface: ge-0/0/0.300, Status: Up, Encapsulation: VLAN
Flow Label Transmit: Yes, Flow Label Receive: Yes
含义
输出显示第2层 VPN 连接信息以及流标签传输和流标签接收信息。
验证路由
用途
验证是否了解了预期的路由。
行动
在操作模式下，运行show route命令以显示路由表中的路由。
user@PE1> show route
inet.0: 51 destinations, 51 routes (51 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
1.0.0.0/24 *[Direct/0] 2d 12:48:34
> via ge-0/0/1.0
1.0.0.1/32 *[Local/0] 2d 12:48:34
Local via ge-0/0/1.0
2.0.0.0/24 *[OSPF/10] 2d 12:48:24, metric 2
> to 1.0.0.2 via ge-0/0/1.0
10.4.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.5.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.6.128.0/17 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.9.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.10.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.13.4.0/23 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.13.10.0/23 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.82.0.0/15 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.84.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.85.12.0/22 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.92.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.94.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.99.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.102.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.102.160.0/19 *[Direct/0] 2d 12:48:34
> via fxp0.0
10.102.169.99/32 *[Local/0] 2d 12:48:34
Local via fxp0.0
10.150.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.155.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.157.64.0/19 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.160.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.204.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.205.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.206.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.207.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.209.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.212.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.213.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.214.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.215.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.216.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.218.13.0/24 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.218.14.0/24 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.218.16.0/20 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.218.32.0/20 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.227.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
10.255.255.1/32 *[Direct/0] 2d 12:48:34
> via lo0.0
10.255.255.2/32 *[OSPF/10] 2d 12:48:24, metric 1
> to 1.0.0.2 via ge-0/0/1.0
10.255.255.4/32 *[OSPF/10] 2d 12:48:24, metric 2
> to 1.0.0.2 via ge-0/0/1.0
128.102.161.191/32 *[OSPF/10] 2d 12:48:24, metric 1
> to 1.0.0.2 via ge-0/0/1.0
128.102.169.99/32 *[Direct/0] 2d 12:48:34
> via lo0.0
128.102.171.41/32 *[OSPF/10] 2d 12:48:24, metric 2
> to 1.0.0.2 via ge-0/0/1.0
172.16.0.0/12 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
192.168.0.0/16 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
192.168.102.0/23 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
207.17.136.0/24 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
207.17.136.192/32 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
207.17.137.0/24 *[Static/5] 2d 12:48:34
> to 10.102.191.254 via fxp0.0
224.0.0.5/32 *[OSPF/10] 2d 12:48:34, metric 1
MultiRecv
inet.3: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.255.255.4/32 *[RSVP/7/1] 2d 12:48:04, metric 2
> to 1.0.0.2 via ge-0/0/1.0, label-switched-path to-pe2
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
47.0005.80ff.f800.0000.0108.0001.1281.0216.9099/152
*[Direct/0] 2d 12:48:34
> via lo0.0
mpls.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0 *[MPLS/0] 2d 12:48:34, metric 1
Receive
1 *[MPLS/0] 2d 12:48:34, metric 1
Receive
2 *[MPLS/0] 2d 12:48:34, metric 1
Receive
13 *[MPLS/0] 2d 12:48:34, metric 1
Receive
800003 *[L2VPN/7] 2d 12:41:29
> via ge-0/0/0.300, Pop Offset: 4
ge-0/0/0.300 *[L2VPN/7] 2d 12:41:29, metric2 2
> to 1.0.0.2 via ge-0/0/1.0, label-switched-path to-pe2
inet6.0: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
abcd::128:102:169:99/128
*[Direct/0] 2d 12:48:34
> via lo0.0
fe80::5668:a60f:fc6b:eb97/128
*[Direct/0] 2d 12:48:34
> via lo0.0
bgp.l2vpn.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.255.255.4:200:2:1/96
*[BGP/170] 2d 12:41:35, localpref 100, from 10.255.255.4
AS path: I, validation-state: unverified
> to 1.0.0.2 via ge-0/0/1.0, label-switched-path to-pe2
l2vpn-inst.l2vpn.0: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.255.255.1:200:1:1/96
*[L2VPN/170/-101] 2d 12:41:29, metric2 1
Indirect
10.255.255.4:200:2:1/96
*[BGP/170] 2d 12:41:35, localpref 100, from 10.255.255.4
AS path: I, validation-state: unverified
> to 1.0.0.2 via ge-0/0/1.0, label-switched-path to-pe2
l2vpn-inst.l2id.0: 2 destinations, 3 routes (2 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
1 *[L2VPN/170/-101] 2d 12:41:29, metric2 1
Indirect
[L2VPN/175] 2d 12:41:29
> via ge-0/0/0.300, Pop Offset: 4
2 *[BGP/170] 2d 12:41:35, localpref 100, from 10.255.255.4
AS path: I, validation-state: unverified
> to 1.0.0.2 via ge-0/0/1.0, label-switched-path to-pe2
含义
输出显示路由表中的所有路由。
配置 PE2
操作
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置设备 PE2：
配置接口。
[edit interfaces] user@PE2# set ge-0/0/0 unit 0 family inet address 2.0.0.2/24 user@PE2# set ge-0/0/0 unit 0 family mpls user@PE2# set ge-0/0/1 vlan-tagging user@PE2# set ge-0/0/1 mtu 1600 user@PE2# set ge-0/0/1 encapsulation vlan-ccc user@PE2# set ge-0/0/1 unit 300 encapsulation vlan-ccc user@PE2# set ge-0/0/1 unit 300 vlan-id 600 user@PE2# set ge-0/0/1 unit 600 encapsulation vlan-vpls user@PE2# set ge-0/0/1 unit 600 vlan-id 600 user@PE2# set ge-0/0/1 unit 600 family vpls deactivate interfaces ge-0/0/1 unit 600 user@PE2# set lo0 unit 0 family inet address 10.255.255.4/32
配置路由器 ID。
[edit routing-options] user@PE2# set router-id 10.255.255.4
配置自治系统（AS）编号，并将策略应用于带有 export 语句的本地路由器的转发表。
[edit routing-options] user@PE2# set autonomous-system 100 user@PE2# set forwarding-table export exp-to-frwd
在接口上配置 RSVP 协议。
[edit protocols rsvp] user@PE2# set interface all user@PE2# set interface ge-0/0/1.0 user@PE2# set interface lo0.0
将标签交换路径属性应用于 MPLS 协议，然后配置接口。
[edit protocols mpls] user@PE2# set label-switched-path to-pe1 to 10.255.255.1 user@PE2# set interface ge-0/0/0.0
定义对等方组，并为对等方组
vpls-pe配置 BGP 会话的本地端地址。[edit protocols bgp group vpls-pe] user@PE2# set type internal user@PE2# set local-address 10.255.255.4
在更新中为 NLRIs 配置协议系列的属性。
[edit protocols bgp group vpls-pe] user@PE2# set family l2vpn auto-discovery-only user@PE2# set family l2vpn signaling
为对等方组
vpls-pe配置邻居。[edit protocols bgp group vpls-pe] user@PE2# set neighbor 10.255.255.1 user@PE2# set neighbor 10.255.255.2
配置信息流工程，并配置 OSPF 区域0.0.0.0 的接口。
[edit protocols ospf] user@PE2# set traffic-engineering user@PE2# set area 0.0.0.0 interface lo0.0 passive user@PE2# set area 0.0.0.0 interface ge-0/0/0.0
配置路由策略和 BGP 社区信息。
[edit policy-options] user@PE2# set policy-statement exp-to-frwd term 0 from community vpls-com user@PE2# set policy-statement exp-to-frwd term 0 then install-nexthop lsp to-pe1 user@PE2# set policy-statement exp-to-frwd term 0 then accept user@PE2# set community vpls-com members target:100:100
配置路由实例的类型，并配置接口。
[edit routing-instances l2vpn-inst] user@PE2# set instance-type l2vpn user@PE2# set interface ge-0/0/1.300
为实例
l2vpn-inst配置路由 distinguisher，并配置 VRF 目标社区。[edit routing-instances l2vpn-inst] user@PE2# set route-distinguisher 10.255.255.4:200 user@PE2# set vrf-target target:100:100
配置 L2VPN 协议所需的封装类型。
[edit routing-instances l2vpn-inst protocols l2vpn] user@PE2# set encapsulation-type ethernet-vlan
配置连接到提供商设备的站点。
[edit routing-instances l2vpn-inst protocols l2vpn] user@PE2# set site pe2 site-identifier 2 user@PE2# set site pe2 interface ge-0/0/1.300 remote-site-id 1
配置路由实例的 L2VPN 协议，以提供广告功能，以便将接收方向上的流标签弹出到远程 PE，并提供广告功能以将传输方向中的流标签推入远程 PE。
[edit routing-instances l2vpn-inst protocols l2vpn] user@PE2# set flow-label-transmit user@PE2# set flow-label-receive
配置路由实例的类型，并配置接口。
[edit routing-instances vpl1] user@PE2# set instance-type vpls user@PE2# set interface ge-0/0/1.600
为实例
vpl1配置路由 distinguisher，并配置 VRF 目标社区。[edit routing-instances vpl1] user@PE2# set route-distinguisher 10.255.255.4:100 user@PE2# set vrf-target target:100:100
分配 VPLS 域的最大站点标识符。
[edit routing-instances vpl1 protocols vpls] user@PE2# set site-range 10
配置为不使用 VPLS 实例的通道服务，并为连接到提供商设备的站点分配站点标识符。
[edit routing-instances vpl1 protocols vpls] user@PE2# set no-tunnel-services user@PE2# set site vpl1PE2 site-identifier 2
配置路由实例的 VPLS 协议，以提供广告功能，以便将接收方向上的流标签弹出到远程 PE，并向远程 PE 的传输方向上的推入流标签提供广告功能。
[edit routing-instances vpl1 protocols vpls] user@PE2# set flow-label-transmit user@PE2# set flow-label-receive
成果
从show interfaces配置模式，输入、 show protocolsshow policy-optionsshow routing-instances、、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@PE2# show interfaces
ge-0/0/0 {
unit 0 {
family inet {
address 2.0.0.2/24;
}
family mpls;
}
}
ge-0/0/1 {
vlan-tagging;
mtu 1600;
encapsulation vlan-ccc;
unit 300 {
encapsulation vlan-ccc;
vlan-id 600;
}
unit 600 {
encapsulation vlan-vpls;
vlan-id 600;
family vpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.255.4/32;
}
}
}
user@PE2# show protocols
rsvp {
interface all;
interface ge-0/0/1.0;
interface lo0.0;
}
mpls {
label-switched-path to-pe1 {
to 10.255.255.1;
}
interface ge-0/0/0.0;
}
bgp {
group vpls-pe {
type internal;
local-address 10.255.255.4;
family l2vpn {
auto-discovery-only;
signaling;
}
neighbor 10.255.255.1;
neighbor 10.255.255.2;
}
}
ospf {
traffic-engineering;
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface ge-0/0/0.0;
}
}
user@PE2# show policy-options
policy-statement exp-to-frwd {
term 0 {
from community vpls-com;
then {
install-nexthop lsp to-pe1;
accept;
}
}
}
community vpls-com members target:100:100;
user@PE2# show routing-instances
l2vpn-inst {
instance-type l2vpn;
interface ge-0/0/1.300;
route-distinguisher 10.255.255.4:200;
vrf-target target:100:100;
protocols {
l2vpn {
encapsulation-type ethernet-vlan;
site pe2 {
site-identifier 2;
interface ge-0/0/1.300 {
remote-site-id 1;
}
}
flow-label-transmit;
flow-label-receive;
}
}
}
vpl1 {
instance-type vpls;
interface ge-0/0/1.600;
route-distinguisher 10.255.255.4:100;
vrf-target target:100:100;
protocols {
vpls {
site-range 10;
no-tunnel-services;
site vpl1PE2 {
site-identifier 2;
}
flow-label-transmit;
flow-label-receive;
}
}
}
user@PE2# show routing-options
router-id 10.255.255.4;
autonomous-system 100;
forwarding-table {
export exp-to-frwd;
}
针对
确认配置是否正常工作。
验证 BGP 摘要信息
用途
验证 BGP 摘要信息。
行动
在操作模式下，输入show bgp summary命令。
user@PE2> show bgp summary
Groups: 1 Peers: 2 Down peers: 1
Table Tot Paths Act Paths Suppressed History Damp State Pending
bgp.l2vpn.0
1 1 0 0 0 0
Peer AS InPkt OutPkt OutQ Flaps Last Up/Dwn State|#Active/Received/Accepted/Damped...
10.255.255.1 100 8090 8119 0 1 2d 12:53:15 Establ
bgp.l2vpn.0: 1/1/1/0
l2vpn-inst.l2vpn.0: 1/1/1/0
10.255.255.2 100 0 0 0 0 2d 14:14:49 Active
含义
输出显示 BGP 摘要信息。
验证 L2VPN 连接信息
用途
验证第2层 VPN 连接信息。
行动
在操作模式下，运行show l2vpn connections命令以显示第2层 VPN 连接信息。
user@PE2> show l2vpn connections
Layer-2 VPN connections:
Legend for connection status (St)
EI -- encapsulation invalid NC -- interface encapsulation not CCC/TCC/VPLS
EM -- encapsulation mismatch WE -- interface and instance encaps not same
VC-Dn -- Virtual circuit down NP -- interface hardware not present
CM -- control-word mismatch -> -- only outbound connection is up
CN -- circuit not provisioned <- -- only inbound connection is up
OR -- out of range Up -- operational
OL -- no outgoing label Dn -- down
LD -- local site signaled down CF -- call admission control failure
RD -- remote site signaled down SC -- local and remote site ID collision
LN -- local site not designated LM -- local site ID not minimum designated
RN -- remote site not designated RM -- remote site ID not minimum designated
XX -- unknown connection status IL -- no incoming label
MM -- MTU mismatch MI -- Mesh-Group ID not available
BK -- Backup connection ST -- Standby connection
PF -- Profile parse failure PB -- Profile busy
RS -- remote site standby SN -- Static Neighbor
LB -- Local site not best-site RB -- Remote site not best-site
VM -- VLAN ID mismatch
Legend for interface status
Up -- operational
Dn -- down
Instance: l2vpn-inst
Edge protection: Not-Primary
Local site: pe2 (2)
connection-site Type St Time last up # Up trans
1 rmt Up Jun 22 14:46:50 2015 1
Remote PE: 10.255.255.1, Negotiated control-word: Yes (Null)
Incoming label: 800002, Outgoing label: 800003
Local interface: ge-0/0/1.300, Status: Up, Encapsulation: VLAN
Flow Label Transmit: Yes, Flow Label Receive: Yes
含义
输出显示第2层 VPN 连接信息以及流标签传输和流标签接收信息。
验证路由
用途
验证是否了解了预期的路由。
行动
在操作模式下，运行show route命令以显示路由表中的路由。
user@PE2> show route
inet.0: 51 destinations, 51 routes (51 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
1.0.0.0/24 *[OSPF/10] 2d 14:09:33, metric 2
> to 2.0.0.1 via ge-0/0/0.0
2.0.0.0/24 *[Direct/0] 2d 14:10:18
> via ge-0/0/0.0
2.0.0.2/32 *[Local/0] 2d 14:10:20
Local via ge-0/0/0.0
10.4.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.5.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.6.128.0/17 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.9.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.10.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.13.4.0/23 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.13.10.0/23 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.82.0.0/15 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.84.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.85.12.0/22 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.92.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.94.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.99.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.102.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.102.160.0/19 *[Direct/0] 2d 14:12:18
> via fxp0.0
10.102.171.41/32 *[Local/0] 2d 14:12:18
Local via fxp0.0
10.150.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.155.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.157.64.0/19 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.160.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.204.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.205.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.206.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.207.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.209.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.212.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.213.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.214.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.215.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.216.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.218.13.0/24 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.218.14.0/24 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.218.16.0/20 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.218.32.0/20 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.227.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
10.255.255.1/32 *[OSPF/10] 2d 12:50:36, metric 2
> to 2.0.0.1 via ge-0/0/0.0
10.255.255.2/32 *[OSPF/10] 2d 14:09:33, metric 1
> to 2.0.0.1 via ge-0/0/0.0
10.255.255.4/32 *[Direct/0] 2d 14:11:51
> via lo0.0
128.102.161.191/32 *[OSPF/10] 2d 14:09:33, metric 1
> to 2.0.0.1 via ge-0/0/0.0
128.102.169.99/32 *[OSPF/10] 2d 12:50:36, metric 2
> to 2.0.0.1 via ge-0/0/0.0
128.102.171.41/32 *[Direct/0] 2d 14:12:18
> via lo0.0
172.16.0.0/12 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
192.168.0.0/16 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
192.168.102.0/23 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
207.17.136.0/24 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
207.17.136.192/32 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
207.17.137.0/24 *[Static/5] 2d 14:12:18
> to 10.102.191.254 via fxp0.0
224.0.0.5/32 *[OSPF/10] 2d 14:11:51, metric 1
MultiRecv
inet.3: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.255.255.1/32 *[RSVP/7/1] 2d 12:50:24, metric 2
> to 2.0.0.1 via ge-0/0/0.0, label-switched-path to-pe1
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
47.0005.80ff.f800.0000.0108.0001.1281.0217.1041/152
*[Direct/0] 2d 14:12:18
> via lo0.0
mpls.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
0 *[MPLS/0] 2d 14:11:51, metric 1
Receive
1 *[MPLS/0] 2d 14:11:51, metric 1
Receive
2 *[MPLS/0] 2d 14:11:51, metric 1
Receive
13 *[MPLS/0] 2d 14:11:51, metric 1
Receive
800002 *[L2VPN/7] 2d 12:43:43
> via ge-0/0/1.300, Pop Offset: 4
ge-0/0/1.300 *[L2VPN/7] 2d 12:43:43, metric2 2
> to 2.0.0.1 via ge-0/0/0.0, label-switched-path to-pe1
inet6.0: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
abcd::128:102:171:41/128
*[Direct/0] 2d 14:12:18
> via lo0.0
fe80::5668:a60f:fc6b:ee28/128
*[Direct/0] 2d 14:12:18
> via lo0.0
bgp.l2vpn.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.255.255.1:200:1:1/96
*[BGP/170] 2d 12:43:43, localpref 100, from 10.255.255.1
AS path: I, validation-state: unverified
> to 2.0.0.1 via ge-0/0/0.0, label-switched-path to-pe1
l2vpn-inst.l2vpn.0: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.255.255.1:200:1:1/96
*[BGP/170] 2d 12:43:43, localpref 100, from 10.255.255.1
AS path: I, validation-state: unverified
> to 2.0.0.1 via ge-0/0/0.0, label-switched-path to-pe1
10.255.255.4:200:2:1/96
*[L2VPN/170/-101] 2d 12:43:50, metric2 1
Indirect
l2vpn-inst.l2id.0: 2 destinations, 3 routes (2 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
1 *[BGP/170] 2d 12:43:43, localpref 100, from 10.255.255.1
AS path: I, validation-state: unverified
> to 2.0.0.1 via ge-0/0/0.0, label-switched-path to-pe1
2 *[L2VPN/170/-101] 2d 12:43:50, metric2 1
Indirect
[L2VPN/175] 2d 12:43:43
> via ge-0/0/1.300, Pop Offset: 4
含义
输出显示路由表中的所有路由。
配置 FAT 伪线对 BGP VPLS 到负载平衡 MPLS 流量的支持
流感知传输（FAT）或流标签受 BGP 信号伪线（如 VPLS）支持，并且仅在标签边缘路由器（LERs）上配置。这使得传输路由器或标签交换路由器（Lsr）可以跨同等成本的多路径（ECMP）或链路聚合组（lag）执行 MPLS 数据包的负载平衡，而无需深度包检测负载。FAT 伪线或流标签可用于具有转发等效类（FEC128 和 FEC129）的 LDP 信号 VPLS，并且对流标签的支持是为点对点或点到多点2服务的 BGP 信号伪线而扩展的。
在将 BGP VPLS 的 FAT 伪线支持配置为负载平衡 MPLS 流量之前：
配置设备接口并在所有接口上启用 MPLS。
配置 RSVP。
将 MPLS 和 LSP 配置为远程 PE 路由器。
配置 BGP 和 OSPF。
要将 BGP VPLS 的 FAT 伪线支持配置为负载平衡 MPLS 流量，必须执行以下操作：
另请参阅
示例：配置 FAT 伪线对 BGP VPLS 到负载平衡 MPLS 流量的支持
此示例演示如何实现 BGP VPLS 的 FAT 伪线支持，以帮助平衡 MPLS 流量。
要求
此示例使用以下硬件和软件组件：
五个 MX 系列路由器
在所有设备上运行 Junos OS Release 16.1 或更高版本
在为 BGP VPLS 配置 FAT 伪线支持之前，请确保配置了路由和信号协议。
概述
Junos OS 允许 BGP 信号伪线（如 VPLS）支持的流感知传输（FAT）流标签仅在标签边缘路由器（LERs）上配置。这会导致传输路由器或标签交换路由器（Lsr）跨相同成本的多路径（ECMP）路径或链路聚合组（lag）执行 MPLS 数据包的负载平衡，而无需深度包检测负载。FAT 流标签可用于 VPWS 和 VPLS 伪线的 LDP 信号转发等价类（FEC 128 和 FEC 129）伪线。
配置
CLI 快速配置
要快速配置此示例，请复制以下命令，将其粘贴到文本文件中，删除任何换行符，更改与网络配置匹配的必要详细信息，将命令复制并粘贴到[edit]层次结构级别的 CLI 中，然后从commit配置模式进入。
CE1
set interfaces ge-0/0/0 vlan-tagging set interfaces ge-0/0/0 unit 600 vlan-id 600 set interfaces ge-0/0/0 unit 600 family inet address 10.1.1.1/24 set interfaces lo0 unit 0 family inet address 10.255.255.8/32
PE1
set interfaces ge-0/0/0 vlan-tagging set interfaces ge-0/0/0 mtu 1600 set interfaces ge-0/0/0 encapsulation vlan-vpls set interfaces ge-0/0/0 unit 600 encapsulation vlan-vpls set interfaces ge-0/0/0 unit 600 vlan-id 600 set interfaces ge-0/0/0 unit 600 family vpls set interfaces ge-0/0/1 unit 0 family inet address 1.0.0.1/24 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.255.1/32 set routing-options nonstop-routing set routing-options router-id 10.255.255.1 set routing-options autonomous-system 100 set routing-options forwarding-table export exp-to-frwd set protocols rsvp interface all set protocols rsvp interface ge-0/0/1.0 set protocols rsvp interface lo0.0 set protocols mpls label-switched-path to-pe2 to 10.255.255.4 set protocols mpls interface ge-0/0/1.0 set protocols bgp group vpls-pe type internal set protocols bgp group vpls-pe local-address 10.255.255.1 set protocols bgp group vpls-pe family l2vpn auto-discovery-only set protocols bgp group vpls-pe family l2vpn signaling set protocols bgp group vpls-pe neighbor 10.255.255.4 set protocols bgp group vpls-pe neighbor 10.255.255.2 set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 set policy-options policy-statement exp-to-frwd term 0 from community vpls-com set policy-options policy-statement exp-to-frwd term 0 then install-nexthop lsp to-pe2 set policy-options policy-statement exp-to-frwd term 0 then accept set policy-options community vpls-com members target:100:100 set routing-instances vpl1 instance-type vpls set routing-instances vpl1 interface ge-0/0/0.600 set routing-instances vpl1 route-distinguisher 10.255.255.1:100 set routing-instances vpl1 vrf-target target:100:100 set routing-instances vpl1 protocols vpls site-range 10 set routing-instances vpl1 protocols vpls no-tunnel-services set routing-instances vpl1 protocols vpls site vpl1PE1 site-identifier 1 set routing-instances vpl1 protocols vpls flow-label-transmit set routing-instances vpl1 protocols vpls flow-label-receive
P
set interfaces ge-0/0/0 unit 0 family inet address 1.0.0.2/24 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 unit 0 family inet address 2.0.0.1/24 set interfaces ge-0/0/1 unit 0 family mpls set interfaces lo0 unit 0 family inet address 10.255.255.2/32 set routing-options router-id 10.255.255.2 set routing-options autonomous-system 100 set protocols rsvp interface ge-0/0/1.0 set protocols rsvp interface ge-0/0/0.0 set protocols rsvp interface lo0.0 set protocols mpls interface ge-0/0/0.0 set protocols mpls interface ge-0/0/1.0 set protocols bgp group vpls-pe type internal set protocols bgp group vpls-pe local-address 10.255.255.2 set protocols bgp group vpls-pe family l2vpn signaling set protocols bgp group vpls-pe neighbor 10.255.255.1 set protocols bgp group vpls-pe neighbor 10.255.255.4 deactivate protocols bgp set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
PE2
set interfaces ge-0/0/0 unit 0 family inet address 2.0.0.2/24 set interfaces ge-0/0/0 unit 0 family mpls set interfaces ge-0/0/1 vlan-tagging set interfaces ge-0/0/1 mtu 1600 set interfaces ge-0/0/1 encapsulation vlan-vpls set interfaces ge-0/0/1 unit 600 encapsulation vlan-vpls set interfaces ge-0/0/1 unit 600 vlan-id 600 set interfaces ge-0/0/1 unit 600 family vpls set interfaces lo0 unit 0 family inet address 10.255.255.4/32 set routing-options router-id 10.255.255.4 set routing-options autonomous-system 100 set routing-options forwarding-table export exp-to-frwd set protocols rsvp interface all set protocols rsvp interface ge-0/0/1.0 set protocols rsvp interface lo0.0 set protocols mpls label-switched-path to-pe1 to 10.255.255.1 set protocols mpls interface ge-0/0/0.0 set protocols bgp group vpls-pe type internal set protocols bgp group vpls-pe local-address 10.255.255.4 set protocols bgp group vpls-pe family l2vpn auto-discovery-only set protocols bgp group vpls-pe family l2vpn signaling set protocols bgp group vpls-pe neighbor 10.255.255.1 set protocols bgp group vpls-pe neighbor 10.255.255.2 set protocols ospf traffic-engineering set protocols ospf area 0.0.0.0 interface lo0.0 passive set protocols ospf area 0.0.0.0 interface ge-0/0/0.0 set policy-options policy-statement exp-to-frwd term 0 from community vpls-com set policy-options policy-statement exp-to-frwd term 0 then install-nexthop lsp to-pe1 set policy-options policy-statement exp-to-frwd term 0 then accept set policy-options community vpls-com members target:100:100 set routing-instances vpl1 instance-type vpls set routing-instances vpl1 interface ge-0/0/1.600 set routing-instances vpl1 route-distinguisher 10.255.255.4:100 set routing-instances vpl1 vrf-target target:100:100 set routing-instances vpl1 protocols vpls site-range 10 set routing-instances vpl1 protocols vpls no-tunnel-services set routing-instances vpl1 protocols vpls site vpl1PE2 site-identifier 2 set routing-instances vpl1 protocols vpls flow-label-transmit set routing-instances vpl1 protocols vpls flow-label-receive
CE2
set interfaces ge-0/0/0 vlan-tagging set interfaces ge-0/0/0 unit 600 vlan-id 600 set interfaces ge-0/0/0 unit 600 family inet address 10.1.1.2/24 set interfaces lo0 unit 0 family inet address 10.255.255.9/32
配置 PE1
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置设备 PE1：
配置接口。
[edit interfaces] user@PE1# set ge-0/0/0 vlan-tagging user@PE1# set ge-0/0/0 mtu 1600 user@PE1# set ge-0/0/0 encapsulation vlan-vpls user@PE1# set ge-0/0/0 unit 600 encapsulation vlan-vpls user@PE1# set ge-0/0/0 unit 600 vlan-id 600 user@PE1# set ge-0/0/0 unit 600 family vpls user@PE1# set ge-0/0/1 unit 0 family inet address 1.0.0.1/24 user@PE1# set ge-0/0/1 unit 0 family mpls user@PE1# set lo0 unit 0 family inet address 10.255.255.1/32
配置不间断路由并配置路由器 ID。
[edit routing-options] user@PE1# set nonstop-routing user@PE1# set router-id 10.255.255.1
配置自治系统（AS）编号，并将策略应用于带有 export 语句的本地路由器的转发表。
[edit routing-options] user@PE1# set autonomous-system 100 user@PE1# set forwarding-table export exp-to-frwd
在接口上配置 RSVP 协议。
[edit protocols rsvp] user@PE1# set interface all user@PE1# set interface ge-0/0/1.0 user@PE1# set interface lo0.0
将标签交换路径属性应用于 MPLS 协议，然后配置接口。
[edit protocols mpls] user@PE1# set label-switched-path to-pe2 to 10.255.255.4 user@PE1# set interface ge-0/0/1.0
定义对等方组，并配置对等方组
vpls-pe的 BGP 会话的本地端地址。[edit protocols bgp group vpls-pe] user@PE1# set type internal user@PE1# set local-address 10.255.255.1
在更新中为 NLRIs 配置协议系列的属性。
[edit protocols bgp group vpls-pe family l2vpn] user@PE1# set auto-discovery-only user@PE1# set signaling
为对等方组
vpls-pe配置邻居。[edit protocols bgp group vpls-pe] user@PE1# set neighbor 10.255.255.4 user@PE1# set neighbor 10.255.255.2
配置信息流工程，并配置 OSPF 区域0.0.0.0 的接口。
[edit protocols ospf] user@PE1# set traffic-engineering user@PE1# set area 0.0.0.0 interface lo0.0 passive user@PE1# set area 0.0.0.0 interface ge-0/0/1.0
配置路由策略和 BGP 社区信息。
[edit policy-options ] user@PE1# set policy-statement exp-to-frwd term 0 from community vpls-com user@PE1# set policy-statement exp-to-frwd term 0 then install-nexthop lsp to-pe2 user@PE1# set policy-statement exp-to-frwd term 0 then accept user@PE1# set community vpls-com members target:100:100
配置路由实例的类型，并配置接口。
[edit routing-instances vp1] user@PE1# set instance-type vpls user@PE1# set interface ge-0/0/0.600
为实例
vpl1配置路由 distinguisher，并配置 VRF 目标社区。[edit routing-instances vpl1] user@PE1# set route-distinguisher 10.255.255.1:100 user@PE1# set vrf-target target:100:100
分配 VPLS 域的最大站点标识符。
[edit routing-instances vp1 protocols vpls] user@PE1# set site-range 10
将 VPLS 协议配置为不使用 VPLS 实例的通道服务，并将站点标识符分配至连接到提供商设备的站点。
[edit routing-instances vp1 protocols vpls] user@PE1# set no-tunnel-services user@PE1# set site vpl1PE1 site-identifier 1
配置路由实例的 VPLS 协议，以提供广告功能，以便将接收方向上的流标签弹出到远程 PE，并提供广告功能以将传输方向中的流标签推入远程 PE。
[edit routing-instances vp1 protocols vpls] user@PE1# set flow-label-receive user@PE1# set flow-label-transmit
成果
从show interfaces配置模式，输入、 show protocolsshow policy-optionsshow routing-instances、、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@PE1# show interfaces
ge-0/0/0 {
vlan-tagging;
mtu 1600;
encapsulation vlan-vpls;
unit 600 {
encapsulation vlan-vpls;
vlan-id 600;
family vpls;
}
}
ge-0/0/1 {
unit 0 {
family inet {
address 1.0.0.1/24;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.255.1/32;
}
}
}
user@PE1# show protocols
rsvp {
interface all;
interface ge-0/0/1.0;
interface lo0.0;
}
mpls {
label-switched-path to-pe2 {
to 10.255.255.4;
}
interface ge-0/0/1.0;
}
bgp {
group vpls-pe {
type internal;
local-address 10.255.255.1;
family l2vpn {
auto-discovery-only;
signaling;
}
neighbor 10.255.255.4;
neighbor 10.255.255.2;
}
}
ospf {
traffic-engineering;
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface ge-0/0/1.0;
}
}
user@PE1# show policy-options
policy-statement exp-to-frwd {
term 0 {
from community vpls-com;
then {
install-nexthop lsp to-pe2;
accept;
}
}
}
community vpls-com members target:100:100;
user@PE1# show routing-instances
vpl1 {
instance-type vpls;
interface ge-0/0/0.600;
route-distinguisher 10.255.255.1:100;
vrf-target target:100:100;
protocols {
vpls {
site-range 10;
no-tunnel-services;
site vpl1PE1 {
site-identifier 1;
}
flow-label-transmit;
flow-label-receive;
}
}
}
user@PE1# show routing-options
nonstop-routing;
router-id 10.255.255.1;
autonomous-system 100;
forwarding-table {
export exp-to-frwd;
}
配置 PE2
分步过程
以下示例要求您在配置层次结构中导航各个级别。有关导航指南CLI，请参阅 Junos OS CLI 指南 中的 在配置模式下使用 CLI编辑器。
要配置设备 PE2：
配置接口。
[edit interfaces] user@PE2# set ge-0/0/0 unit 0 family inet address 2.0.0.2/24 user@PE2# set ge-0/0/0 unit 0 family mpls user@PE2# set ge-0/0/1 vlan-tagging user@PE2# set ge-0/0/1 mtu 1600 user@PE2# set ge-0/0/1 encapsulation vlan-vpls user@PE2# set ge-0/0/1 unit 600 encapsulation vlan-vpls user@PE2# set ge-0/0/1 unit 600 vlan-id 600 user@PE2# set ge-0/0/1 unit 600 family vpls user@PE2# set lo0 unit 0 family inet address 10.255.255.4/32
配置路由器 ID。
[edit routing-options] user@PE2# set router-id 10.255.255.4
配置自治系统（AS）编号，并将策略应用于带有 export 语句的本地路由器的转发表。
[edit routing-options] user@PE2# set autonomous-system 100 user@PE2# set forwarding-table export exp-to-frwd
在接口上配置 RSVP 协议。
[edit protocols rsvp] user@PE2# set interface all user@PE2# set interface ge-0/0/1.0 user@PE2# set interface lo0.0
将标签交换路径属性应用于 MPLS 协议，然后配置接口。
[edit protocols mpls] user@PE2# set label-switched-path to-pe1 to 10.255.255.1 user@PE2# set interface ge-0/0/0.0
定义对等方组，并配置对等方组
vpls-pe的 BGP 会话的本地地址。[edit protocols bgp group vpls-pe] user@PE2# set type internal user@PE2# set local-address 10.255.255.4
在更新中为 NLRIs 配置协议系列的属性。
[edit protocols bgp group vpls-pe] user@PE2# set family l2vpn auto-discovery-only user@PE2# set family l2vpn signaling
为对等方组
vpls-pe配置邻居。[edit protocols bgp group vpls-pe] user@PE2# set neighbor 10.255.255.1 user@PE2# set neighbor 10.255.255.2
配置信息流工程，并配置 OSPF 区域0.0.0.0 的接口。
[edit protocols ospf] user@PE2# set traffic-engineering user@PE2# set area 0.0.0.0 interface lo0.0 passive user@PE2# set area 0.0.0.0 interface ge-0/0/0.0
配置路由策略和 BGP 社区信息。
[edit policy-options ] user@PE2# set policy-statement exp-to-frwd term 0 from community vpls-com user@PE2# set policy-statement exp-to-frwd term 0 then install-nexthop lsp to-pe1 user@PE2# set policy-statement exp-to-frwd term 0 then accept user@PE2# set community vpls-com members target:100:100
配置路由实例的类型，并配置接口。
[edit routing-instances vpl1] user@PE2# set instance-type vpls user@PE2# set interface ge-0/0/1.600
为实例
vp11配置路由 distinguisher，并配置 VRF 目标社区。[edit routing-instances vpl1] user@PE2# set route-distinguisher 10.255.255.4:100 user@PE2# set vrf-target target:100:100
分配 VPLS 域的最大站点标识符。
[edit routing-instances vpl1 protocols vpls] user@PE2# set site-range 10
将 VPLS 协议配置为不使用 VPLS 实例的通道服务，并将站点标识符分配至连接到提供商设备的站点。
[edit routing-instances vpl1 protocols vpls] user@PE2# set no-tunnel-services user@PE2# set site vpl1PE2 site-identifier 2
配置路由实例的 VPLS 协议，以提供广告功能，以便将接收方向上的流标签弹出到远程 PE，并提供广告功能以将传输方向中的流标签推入远程 PE。
[edit routing-instances vpl1 protocols vpls] user@PE2# set flow-label-transmit user@PE2# set flow-label-receive
成果
从show interfaces配置模式，输入、 show protocolsshow policy-optionsshow routing-instances、、和show routing-options命令以确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明以更正配置。
user@PE2# show interfaces
ge-0/0/0 {
unit 0 {
family inet {
address 2.0.0.2/24;
}
family mpls;
}
}
ge-0/0/1 {
vlan-tagging;
mtu 1600;
encapsulation vlan-vpls;
unit 600 {
encapsulation vlan-vpls;
vlan-id 600;
family vpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.255.4/32;
}
}
}
user@PE2# show protocols
rsvp {
interface all;
interface ge-0/0/1.0;
interface lo0.0;
}
mpls {
label-switched-path to-pe1 {
to 10.255.255.1;
}
interface ge-0/0/0.0;
}
bgp {
group vpls-pe {
type internal;
local-address 10.255.255.4;
family l2vpn {
auto-discovery-only;
signaling;
}
neighbor 10.255.255.1;
neighbor 10.255.255.2;
}
}
ospf {
traffic-engineering;
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface ge-0/0/0.0;
}
}
user@PE2# show policy-options
policy-statement exp-to-frwd {
term 0 {
from community vpls-com;
then {
install-nexthop lsp to-pe1;
accept;
}
}
}
community vpls-com members target:100:100;
user@PE2# show routing-instances
vpl1 {
instance-type vpls;
interface ge-0/0/1.600;
route-distinguisher 10.255.255.4:100;
vrf-target target:100:100;
protocols {
vpls {
site-range 10;
no-tunnel-services;
site vpl1PE2 {
site-identifier 2;
}
flow-label-transmit;
flow-label-receive;
}
}
}
user@PE2# show routing-options
router-id 10.255.255.4;
autonomous-system 100;
forwarding-table {
export exp-to-frwd;
}
针对
确认配置是否正常工作。
验证 VPLS 连接信息
用途
验证 VPLS 连接信息。
行动
在操作模式下，运行show vpls connections命令以显示 VPLS 连接信息。
user@PE1> show vpls connections
Layer-2 VPN connections:
Legend for connection status (St)
EI -- encapsulation invalid NC -- interface encapsulation not CCC/TCC/VPLS
EM -- encapsulation mismatch WE -- interface and instance encaps not same
VC-Dn -- Virtual circuit down NP -- interface hardware not present
CM -- control-word mismatch -> -- only outbound connection is up
CN -- circuit not provisioned <- -- only inbound connection is up
OR -- out of range Up -- operational
OL -- no outgoing label Dn -- down
LD -- local site signaled down CF -- call admission control failure
RD -- remote site signaled down SC -- local and remote site ID collision
LN -- local site not designated LM -- local site ID not minimum designated
RN -- remote site not designated RM -- remote site ID not minimum designated
XX -- unknown connection status IL -- no incoming label
MM -- MTU mismatch MI -- Mesh-Group ID not available
BK -- Backup connection ST -- Standby connection
PF -- Profile parse failure PB -- Profile busy
RS -- remote site standby SN -- Static Neighbor
LB -- Local site not best-site RB -- Remote site not best-site
VM -- VLAN ID mismatch
Legend for interface status
Up -- operational
Dn -- down
Instance: vpl1
Edge protection: Not-Primary
Local site: vpl1PE1 (1)
connection-site Type St Time last up # Up trans
2 rmt Up Jun 17 11:38:14 2015 1
Remote PE: 10.255.255.4, Negotiated control-word: No
Incoming label: 262146, Outgoing label: 262145
Local interface: lsi.1048576, Status: Up, Encapsulation: VPLS
Description: Intf - vpls vpl1 local site 1 remote site 2
Flow Label Transmit: Yes, Flow Label Receive: Yes
含义
输出显示 VPLS 连接信息以及流标签接收和流标签传输信息。
针对
确认配置是否正常工作。
验证 VPLS 连接信息
用途
验证 VPLS 连接信息。
行动
在操作模式下，运行show vpls connections命令以显示 VPLS 连接信息。
user@PE2> show vpls connections
Layer-2 VPN connections:
Legend for connection status (St)
EI -- encapsulation invalid NC -- interface encapsulation not CCC/TCC/VPLS
EM -- encapsulation mismatch WE -- interface and instance encaps not same
VC-Dn -- Virtual circuit down NP -- interface hardware not present
CM -- control-word mismatch -> -- only outbound connection is up
CN -- circuit not provisioned <- -- only inbound connection is up
OR -- out of range Up -- operational
OL -- no outgoing label Dn -- down
LD -- local site signaled down CF -- call admission control failure
RD -- remote site signaled down SC -- local and remote site ID collision
LN -- local site not designated LM -- local site ID not minimum designated
RN -- remote site not designated RM -- remote site ID not minimum designated
XX -- unknown connection status IL -- no incoming label
MM -- MTU mismatch MI -- Mesh-Group ID not available
BK -- Backup connection ST -- Standby connection
PF -- Profile parse failure PB -- Profile busy
RS -- remote site standby SN -- Static Neighbor
LB -- Local site not best-site RB -- Remote site not best-site
VM -- VLAN ID mismatch
Legend for interface status
Up -- operational
Dn -- down
Instance: vpl1
Edge protection: Not-Primary
Local site: vpl1PE2 (2)
connection-site Type St Time last up # Up trans
1 rmt Up Jun 17 11:38:14 2015 1
Remote PE: 10.255.255.1, Negotiated control-word: No
Incoming label: 262145, Outgoing label: 262146
Local interface: lsi.1048576, Status: Up, Encapsulation: VPLS
Description: Intf - vpls vpl1 local site 2 remote site 1
Flow Label Transmit: Yes, Flow Label Receive: Yes
含义
输出显示 VPLS 连接信息以及流标签接收和流标签传输信息。
发布历史记录表
版本
说明
20.2R1
从 Junos OS 版 20.2R1 开始，MX 系列、EX9204、EX9208、EX9214、EX9251 和 EX9253 设备支持用于 2 层电路、第 2 层 VPN 和 VPLS （BGP VPLS、LDP VPLS 和 FEC 129 VPLS） 服务的 BGP PIC 边缘保护，标记为 BGP 作为传输协议。
19.2R1
从 Junos OS 版本 19.2 R1 开始，您可以在 QFX10000 交换机上指定最大数量的512等成本路径。
19.1R1
从 Junos OS Release 19.1 R1 开始，您可以在 QFX10000 交换机上指定最大数量的128等成本路径。
18.4R1
从Junos OS版本18.4R1，BGP除了多个 ECMP 路径之外，还可以通告最多 2 个 添加路径路由。
18.1R1
从 Junos OS 版本 18.1 R1 开始 BGP 在[edit protocols bgp]层次结构级别全局支持多路径。您可以有选择地禁用某些 BGP 组和邻居上的多路径。包含disable在[edit protocols bgp group group-name multipath]层次结构级别，用于禁用组或特定 BGP 邻居的多路径选项。
18.1R1
从 Junos OS 版本 18.1 R1 开始，您可以推迟多路径计算，直到收到所有 BGP 路由。启用多路径时，每次添加新路由或现有路由发生变化时，BGP 都会将路由插入多路径队列中。通过 BGP 添加路径功能接收多条路径时，BGP 可能多次计算一个多路径路由。多路径计算减慢了筋（也称为路由表）学习率。为了加速筋学习，多路径计算可以推迟到 BGP 路由接收，或者可以根据您的要求降低多路径生成作业的优先级，直至解决 BGP 路由。在defer-initial-multipath-build层次结构级别推迟多[edit protocols bgp]路径计算配置。或者，您可以使用multipath-build-priority[edit protocols bgp]层次结构级别的配置语句降低 BGP 多路径生成作业优先级，以加速筋学习。