示例：单跃点 IS-IS 邻接方上的加权 ECMP 流量分配
此示例说明如何配置加权等价多路径 （ECMP） 路由，以便将流量分配到仅隔一个跃点的 IS-IS 邻接方，从而确保最佳负载平衡。加权 ECMP 路由会在多个路径上不均匀地分配流量，以实现更好的负载平衡。但是，在按数据包负载平衡期间，加权 ECMP 路由比均分配流量更有效。
要求
此示例使用以下硬件和软件组件：
两台 MX 系列路由器
Junos OS 15.1F4 或更高版本
在 IS-IS 网络中配置加权 ECMP 之前，请确保您：
在设备接口上配置 IP 地址。
配置 IS-IS。
配置负载平衡
配置按数据包的负载平衡策略。
概述
从 Junos OS 15.1F4 版开始，您可以配置 IS-IS 协议来获取与等价多路径 （ECMP） 下一跃点网关关联的逻辑接口带宽信息。在按数据包实现负载平衡期间，流量分配会基于可用带宽，以便针对单跳距离的 ECMP 路径上的传入流量使用最佳带宽。数据包转发引擎不会平均分配流量，而是考虑余额值并根据带宽可用性分配流量。但是，此功能不适用于相距多个跃点的 ECMP 路径。
拓扑结构
在 图 1 中，路由器 R0 和路由器 R1 之间配置了三个聚合以太网束 ae0、ae1 和 ae2，每个有四个链路。当其中一条链路出现故障时，数据包转发引擎会根据可用带宽在三个以太网捆绑包之间不均匀地分配流量。
图 1：单跃点 IS-IS 邻接方
上的加权 ECMP 流量分配
上的加权 ECMP 流量分配
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，删除所有换行符，更改详细信息，以便与网络配置匹配，将命令复制并粘贴到层次结构级别的 [edit] CLI 中，然后从配置模式进入。commit
路由器 R0
set interfaces ge-1/1/4 description "LinkID: R0R1-1" set interfaces ge-0/0/0 description "LinkID: R0R1-2" set interfaces ge-1/2/1 description "LinkID: R0R1-3" set interfaces ge-1/2/2 description "LinkID: R0R1-4" set interfaces ge-1/2/0 description "LinkID: R0R1-5" set interfaces ge-1/2/3 description "LinkID: R0R1-6" set interfaces ge-0/1/6 description "LinkID: R0R1-7" set interfaces ge-1/1/6 description "LinkID: R0R1-8" set interfaces ge-1/1/5 description "LinkID: R0R1-9" set interfaces ge-1/3/3 description "LinkID: R0R1-10" set interfaces ge-1/2/8 description "LinkID: R0R1-11" set interfaces ge-0/1/8 description "LinkID: R0R1-12" set interfaces ge-0/1/7 description "LinkID: R0R1-13" set interfaces ge-0/0/1 description "LinkID: R0RT0" set chassis maximum-ecmp 64 set chassis redundancy graceful-switchover set chassis aggregated-devices ethernet device-count 64 set interfaces ge-0/0/1 unit 0 family inet address 21.1.1.1/24 set interfaces ge-0/0/1 unit 0 family iso set interfaces ge-1/1/4 gigether-options 802.3ad ae0 set interfaces ge-0/0/0 gigether-options 802.3ad ae0 set interfaces ge-1/2/1 gigether-options 802.3ad ae0 set interfaces ge-1/2/2 gigether-options 802.3ad ae0 set interfaces ge-1/2/0 gigether-options 802.3ad ae1 set interfaces ge-1/2/3 gigether-options 802.3ad ae1 set interfaces ge-0/1/6 gigether-options 802.3ad ae1 set interfaces ge-1/1/6 gigether-options 802.3ad ae1 set interfaces ge-1/1/5 gigether-options 802.3ad ae2 set interfaces ge-1/3/3 gigether-options 802.3ad ae2 set interfaces ge-1/2/8 gigether-options 802.3ad ae2 set interfaces ge-0/1/8 gigether-options 802.3ad ae2 set interfaces ge-0/1/7 unit 0 family inet address 10.3.1.1/24 set interfaces ge-0/1/7 unit 0 family iso set interfaces ae0 aggregated-ether-options minimum-links 1 set interfaces ae0 aggregated-ether-options lacp active set interfaces ae0 unit 0 family inet address 10.0.1.1/24 set interfaces ae0 unit 0 family iso set interfaces ae1 vlan-tagging set interfaces ae1 aggregated-ether-options minimum-links 1 set interfaces ae1 aggregated-ether-options lacp active set interfaces ae1 unit 0 family inet address 10.1.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 1; set interfaces ae1 unit 1 family inet address 13.1.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 2; set interfaces ae1 unit 1 family inet address 13.2.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 3; set interfaces ae1 unit 1 family inet address 13.3.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 4; set interfaces ae1 unit 1 family inet address 13.4.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 5; set interfaces ae1 unit 1 family inet address 13.5.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 6; set interfaces ae1 unit 1 family inet address 13.6.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 7; set interfaces ae1 unit 1 family inet address 13.7.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 8; set interfaces ae1 unit 1 family inet address 13.8.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 9; set interfaces ae1 unit 1 family inet address 13.9.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae1 unit 1 bandwidth 1g; set interfaces ae1 unit 1 vlan-id 10; set interfaces ae1 unit 1 family inet address 13.10.1.1/24 set interfaces ae1 unit 0 family iso set interfaces ae2 aggregated-ether-options minimum-links 2 set interfaces ae2 aggregated-ether-options lacp active set interfaces ae2 unit 0 family inet address 10.2.1.1/24 set interfaces ae2 unit 0 family iso set interfaces lo0 unit 0 family iso address 49.0001.0102.5516.3127.00 set routing-options forwarding-table export pplb set protocols isis interface ge-0/0/1.0 set protocols isis interface ge-0/1/7.0 level 1 metric 20 set protocols isis interface ge-0/1/7.0 level 2 metric 20 set protocols isis interface ae0.0 node-link-protection set protocols isis interface ae1.0 set protocols isis interface ae2.0 set protocols isis interface lo0.0 set policy-options policy-statement pplb then load-balance per-packet set protocols isis spf-options multipath weighted one-hop
路由器 R1
set interfaces ge-1/1/4 description "LinkID: R0R1-1" set interfaces ge-0/0/0 description "LinkID: R0R1-2" set interfaces ge-1/2/1 description "LinkID: R0R1-3" set interfaces ge-1/2/2 description "LinkID: R0R1-4" set interfaces ge-1/2/0 description "LinkID: R0R1-5" set interfaces ge-1/2/3 description "LinkID: R0R1-6" set interfaces ge-0/1/6 description "LinkID: R0R1-7" set interfaces ge-1/1/6 description "LinkID: R0R1-8" set interfaces ge-1/1/5 description "LinkID: R0R1-9" set interfaces ge-1/3/3 description "LinkID: R0R1-10" set interfaces ge-1/2/8 description "LinkID: R0R1-11" set interfaces ge-0/1/8 description "LinkID: R0R1-12" set interfaces ge-0/1/7 description "LinkID: R0R1-13" set interfaces ge-0/1/0 description "LinkID: R1RT0" set chassis aggregated-devices ethernet device-count 64 set interfaces ge-0/1/0 unit 0 family inet address 22.1.1.1/24 set interfaces ge-0/1/0 unit 0 family iso set interfaces ge-1/1/4 gigether-options 802.3ad ae0 set interfaces ge-0/0/0 gigether-options 802.3ad ae0 set interfaces ge-1/2/1 gigether-options 802.3ad ae0 set interfaces ge-1/2/2 gigether-options 802.3ad ae0 set interfaces ge-1/2/0 gigether-options 802.3ad ae1 set interfaces ge-1/2/3 gigether-options 802.3ad ae1 set interfaces ge-0/1/6 gigether-options 802.3ad ae1 set interfaces ge-1/1/6 gigether-options 802.3ad ae1 set interfaces ge-1/1/5 gigether-options 802.3ad ae2 set interfaces ge-1/3/3 gigether-options 802.3ad ae2 set interfaces ge-1/2/8 gigether-options 802.3ad ae2 set interfaces ge-0/1/8 gigether-options 802.3ad ae2 set interfaces ge-0/1/7 unit 0 family inet address 10.3.1.2/24 set interfaces ge-0/1/7 unit 0 family iso set interfaces ae0 aggregated-ether-options minimum-links 1 set interfaces ae0 aggregated-ether-options lacp active set interfaces ae0 unit 0 family inet address 10.0.1.2/24 set interfaces ae0 unit 0 family iso set interfaces ae1 aggregated-ether-options minimum-links 1 set interfaces ae1 aggregated-ether-options lacp active set interfaces ae1 unit 0 family inet address 10.1.1.2/24 set interfaces ae1 unit 0 family iso set interfaces ae2 aggregated-ether-options minimum-links 2 set interfaces ae2 aggregated-ether-options lacp active set interfaces ae2 unit 0 family inet address 10.2.1.2/24 set interfaces ae2 unit 0 family iso set interfaces lo0 unit 0 family iso address 49.0001.0102.5516.3130.00 set protocols isis export from-static set protocols isis interface ge-0/1/0.0 set protocols isis interface ge-0/1/7.0 set protocols isis interface ae0.0 set protocols isis interface ae1.0 set protocols isis interface ae2.0 set protocols isis interface lo0.0 set policy-options policy-statement from-static from protocol static set policy-options policy-statement from-static then accept
配置路由器 R0
分步程序
下面的示例要求您在各个配置层级中进行导航。有关导航 CLI 的信息，请参阅 《CLI 用户指南》中的在配置模式下使用 CLI 编辑器。
要配置路由器 R0，请执行以下操作：
注意：
修改相应的接口名称、地址和其他参数后，对路由器 R1 重复此过程。
指定要配置的最大加权 ECMP 接口数。启用平滑切换并指定要创建的聚合以太网接口数量。
[edit chassis]user@R0# set maximum-ecmp 64 user@R0# set redundancy graceful-switchover user@R0# set aggregated-devices ethernet device-count 64配置接口，其中包含指向同一目标的多个链路，以实现流量负载平衡。
[edit interfaces]user@R0# set ge-1/1/4 description "LinkID: R0R1-1" user@R0# set ge-0/0/0 description "LinkID: R0R1-2" user@R0# set ge-1/2/1 description "LinkID: R0R1-3" user@R0# set ge-1/2/2 description "LinkID: R0R1-4" user@R0# set ge-1/2/0 description "LinkID: R0R1-5" user@R0# set ge-1/2/3 description "LinkID: R0R1-6" user@R0# set ge-0/1/6 description "LinkID: R0R1-7" user@R0# set ge-1/1/6 description "LinkID: R0R1-8" user@R0# set ge-1/1/5 description "LinkID: R0R1-9" user@R0# set ge-1/3/3 description "LinkID: R0R1-10" user@R0# set ge-1/2/8 description "LinkID: R0R1-11" user@R0# set ge-0/1/8 description "LinkID: R0R1-12" user@R0# set ge-0/1/7 description "LinkID: R0R1-13" user@R0# set ge-0/0/1 description "LinkID: R0RT0"根据底层物理带宽配置具有适当带宽的逻辑接口。
user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 1; user@R0# set ae1 unit 1 family inet address 13.1.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 2; user@R0# set ae1 unit 1 family inet address 13.2.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 3; user@R0# set ae1 unit 1 family inet address 13.3.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 4; user@R0# set ae1 unit 1 family inet address 13.4.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 5; user@R0# set ae1 unit 1 family inet address 13.5.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 6; user@R0# set ae1 unit 1 family inet address 13.6.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 7; user@R0# set ae1 unit 1 family inet address 13.7.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 8; user@R0# set ae1 unit 1 family inet address 13.8.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 9; user@R0# set ae1 unit 1 family inet address 13.9.1.1/24 user@R0# set ae1 unit 0 family iso user@R0# set ae1 unit 1 bandwidth 1g; user@R0# set ae1 unit 1 vlan-id 10; user@R0# set ae1 unit 1 family inet address 13.10.1.1/24 user@R0# set ae1 unit 0 family iso
注意：对于逻辑接口，配置接口带宽，以基于底层操作接口带宽跨等价多路径分配流量。在单个接口上配置多个逻辑接口时，请为每个逻辑接口配置适当的逻辑带宽，以便查看所需流量通过逻辑接口的分布情况。
根据您的网络要求，在接口上配置 IP 地址为 IPv4 或 IPv6。
[edit interfaces]user@R0# set ge-0/0/1 unit 0 family inet address 21.1.1.1/24 user@R0# set ge-0/0/1 unit 0 family iso user@R0# set ge-0/1/7 unit 0 family inet address 10.3.1.1/24 user@R0# set ge-0/1/7 unit 0 family iso配置 ae0 聚合以太网捆绑包的四个成员链路。
[edit interfaces]user@R0# set ge-1/1/4 gigether-options 802.3ad ae0 user@R0# set ge-0/0/0 gigether-options 802.3ad ae0 user@R0# set ge-1/2/1 gigether-options 802.3ad ae0 user@R0# set ge-1/2/2 gigether-options 802.3ad ae0配置 ae1 聚合以太网捆绑包的四个成员链路。
[edit interfaces]user@R0# set ge-1/2/0 gigether-options 802.3ad ae1 user@R0# set ge-1/2/3 gigether-options 802.3ad ae1 user@R0# set ge-0/1/6 gigether-options 802.3ad ae1 user@R0# set ge-1/1/6 gigether-options 802.3ad ae1配置 ae2 聚合以太网捆绑包的四个成员链路。
[edit interfaces]user@R0# set ge-1/1/5 gigether-options 802.3ad ae2 user@R0# set ge-1/3/3 gigether-options 802.3ad ae2 user@R0# set ge-1/2/8 gigether-options 802.3ad ae2 user@R0# set ge-0/1/8 gigether-options 802.3ad ae2为 ae0 聚合以太网接口配置 IP 地址和链路聚合控制协议 （LACP）。
[edit interfaces]user@R0# set ae0 aggregated-ether-options minimum-links 1 user@R0# set ae0 aggregated-ether-options lacp active user@R0# set ae0 unit 0 family inet address 10.0.1.1/24 user@R0# set ae0 unit 0 family iso为 ae1 聚合以太网接口配置 IP 地址和链路聚合控制协议 （LACP）。
[edit interfaces]user@R0# set ae1 aggregated-ether-options minimum-links 1 user@R0# set ae1 aggregated-ether-options lacp active user@R0# set ae1 unit 0 family inet address 10.1.1.1/24 user@R0# set ae1 unit 0 family iso为 ae2 聚合以太网接口配置 IP 地址和链路聚合控制协议 （LACP）。
[edit interfaces]user@R0# set ae2 aggregated-ether-options minimum-links 2 user@R0# set ae2 aggregated-ether-options lacp active user@R0# set ae2 unit 0 family inet address 10.2.1.1/24 user@R0# set ae2 unit 0 family iso配置环路接口地址和 iso 家族地址。
[edit interfaces]user@R0# set lo0 unit 0 family inet address 10.168.0.4/32 user@R0# set lo0 unit 0 family iso address 49.0001.0102.5516.3127.00在所有接口和 AE 捆绑包上配置 IS-IS。
[edit protocols]user@R0# set isis interface ge-0/0/1.0 user@R0# set isis interface ge-0/1/7.0 level 1 metric 20 user@R0# set isis interface ge-0/1/7.0 level 2 metric 20 user@R0# set isis interface ae0.0 node-link-protection user@R0# set isis interface ae1.0 user@R0# set isis interface ae2.0 user@R0# set isis interface lo0.0配置按数据包的负载平衡。
[edit policy-options]user@R0# set policy-statement pplb then load-balance per-packet应用按数据包的负载平衡策略。
[edit routing-options]user@R0# set forwarding-table user@R0# set export pplb在直接连接的 IS-IS 邻接方上启用加权 ECMP 流量分配。
[edit protocols isis]user@R0# set spf-options multipath weighted one-hop
结果
在配置模式下，输入 show chassis、 show interfaces、 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。
[edit] user@R0# show chassis maximum-ecmp 64; redundancy graceful-switchover; aggregated-devices ethernet device-count 64;
[edit]
user@R0# show interfaces
ge-0/0/0 {
description "LinkID: R0R1-2";
gigether-options {
802.3ad ae0;
}
}
ge-0/0/1 {
description "LinkID: R0RT0";
unit 0 {
family inet {
address 21.1.1.1/24;
}
family iso;
}
}
ge-0/1/6 {
description "LinkID: R0R1-7";
gigether-options {
802.3ad ae1;
}
}
ge-0/1/7 {
description "LinkID: R0R1-13";
unit 0 {
family inet {
address 10.3.1.1/24;
}
family iso;
}
}
ge-0/1/8 {
description "LinkID: R0R1-12";
gigether-options {
802.3ad ae2;
}
}
ge-1/1/4 {
description "LinkID: R0R1-1";
gigether-options {
802.3ad ae0;
}
}
ge-1/1/5 {
description "LinkID: R0R1-9";
gigether-options {
802.3ad ae2;
}
}
ge-1/1/6 {
description "LinkID: R0R1-8";
gigether-options {
802.3ad ae1;
}
}
ge-1/2/0 {
description "LinkID: R0R1-5";
gigether-options {
802.3ad ae1;
}
}
ge-1/2/1 {
description "LinkID: R0R1-3";
gigether-options {
802.3ad ae0;
}
}
ge-1/2/2 {
description "LinkID: R0R1-4";
gigether-options {
802.3ad ae0;
}
}
ge-1/2/3 {
description "LinkID: R0R1-6";
gigether-options {
802.3ad ae1;
}
}
ge-1/2/8 {
description "LinkID: R0R1-11";
gigether-options {
802.3ad ae2;
}
}
ge-1/3/3 {
description "LinkID: R0R1-10";
gigether-options {
802.3ad ae2;
}
}
ae0 {
aggregated-ether-options {
minimum-links 1;
lacp {
active;
}
}
unit 0 {
family inet {
address 10.0.1.1/24;
}
family iso;
}
}
ae1 {
vlan-tagging;
aggregated-ether-options {
minimum-links 3;
lacp {
active;
}
}
unit 0 {
family inet {
address 10.1.1.1/24;
}
family iso;
}
unit 1 {
bandwidth 1g;
vlan-id 1;
family inet {
address 13.1.1.1/24;
}
family iso;
}
unit 2 {
bandwidth 1g;
vlan-id 2;
family inet {
address 13.2.1.1/24;
}
family iso;
}
unit 3 {
bandwidth 1g;
vlan-id 3;
family inet {
address 13.3.1.1/24;
}
family iso;
}
unit 4 {
bandwidth 1g;
vlan-id 4;
family inet {
address 13.4.1.1/24;
}
family iso;
}
unit 5 {
bandwidth 1g;
vlan-id 5;
family inet {
address 13.5.1.1/24;
}
family iso;
}
unit 6 {
bandwidth 1g;
vlan-id 6;
family inet {
address 13.6.1.1/24;
}
family iso;
}
unit 7 {
bandwidth 1g;
vlan-id 7;
family inet {
address 13.7.1.1/24;
}
family iso;
}
unit 8 {
bandwidth 1g;
vlan-id 8;
family inet {
address 13.8.1.1/24;
}
family iso;
}
unit 9 {
bandwidth 1g;
vlan-id 9;
family inet {
address 13.9.1.1/24;
}
family iso;
}
unit 10 {
bandwidth 1g;
vlan-id 10;
family inet {
address 13.10.1.1/24;
}
family iso;
}
}
ae2 {
aggregated-ether-options {
minimum-links 2;
lacp {
active;
}
}
unit 0 {
family inet {
address 10.2.1.1/24;
}
family iso;
}
}
lo0 {
unit 0 {
family inet {
address 192.168.0.4/32;
}
family iso {
address 49.0001.0102.5516.3127.00;
}
}
}
[edit]
user@R0# show protocols
isis {
spf-options {
multi-path {
weighted {
one-hop;
}
}
}
}
[edit]
user@R01# show policy-options
policy-statement pplb {
then {
load-balance per-packet;
}
}
[edit]
user@R0# show routing-options
forwarding-table {
export pplb;
}
验证
确认配置工作正常。
验证等价多条路径上的流量均匀分配
目的
验证流量是否在聚合以太网捆绑包上均匀分布。
行动
在操作模式下，输入命令 show route 198.0.0.1 extensive 。
user@R0> show route 198.0.0.1 extensive
inet.0: 10028 destinations, 10029 routes (10027 active, 0 holddown, 1 hidden)
198.0.0.1/32 (1 entry, 1 announced)
TSI:
KRT in-kernel 198.0.0.1/32 -> {10.0.1.2, 10.1.1.2, 10.2.1.2, 10.3.1.2}
*IS-IS Preference: 18
Level: 2
Next hop type: Router, Next hop index: 1048574
Address: 0x9ec5e10
Next-hop reference count: 20005
Next hop: 10.0.1.2 via ae0.0 weight 0x1 balance 33%
Session Id: 0x1b2
Next hop: 10.1.1.2 via ae1.0 weight 0x1 balance 33%, selected
Session Id: 0x1b1
Next hop: 10.2.1.2 via ae2.0 weight 0x1 balance 33%
Session Id: 0x1b3
Next hop: 10.3.1.2 via ge-0/1/7.0 weight 0xf000
Session Id: 0x1b0
State: <Active Int>
Age: 35 Metric: 20
Validation State: unverified
Task: IS-IS
Announcement bits (1): 0-KRT
AS path: I
user@R0> show interfaces ae0.0 extensive
Logical interface ae0.0 (Index 335) (SNMP ifIndex 625) (Generation 825)
Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 702 4 207265 4320
Output: 870567 33801 95801535 29746416
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Link:
ge-0/0/0.0
Input : 149 1 17924 992
Output: 218927 8586 24081728 7556344
ge-1/1/4.0
Input : 134 1 16616 992
Output: 201384 7781 22152240 6847320
ge-1/2/1.0
Input : 136 1 16864 992
Output: 212760 8238 23443069 7250056
ge-1/2/2.0
Input : 283 1 155861 1344
Output: 237496 9196 26124498 8092696
Aggregate member links: 4
LACP info: Role System System Port Port Port
priority identifier priority number key
ge-0/0/0.0 Actor 127 3c:61:04:2f:c7:c0 127 1 1
ge-0/0/0.0 Partner 127 3c:61:04:2d:9f:c0 127 1 1
ge-1/1/4.0 Actor 127 3c:61:04:2f:c7:c0 127 4 1
ge-1/1/4.0 Partner 127 3c:61:04:2d:9f:c0 127 4 1
ge-1/2/1.0 Actor 127 3c:61:04:2f:c7:c0 127 8 1
ge-1/2/1.0 Partner 127 3c:61:04:2d:9f:c0 127 8 1
ge-1/2/2.0 Actor 127 3c:61:04:2f:c7:c0 127 9 1
ge-1/2/2.0 Partner 127 3c:61:04:2d:9f:c0 127 9 1
LACP Statistics: LACP Rx LACP Tx Unknown Rx Illegal Rx
ge-0/0/0.0 130 125 0 0
ge-1/1/4.0 127 121 0 0
ge-1/2/1.0 127 123 0 0
ge-1/2/2.0 128 123 0 0
Marker Statistics: Marker Rx Resp Tx Unknown Rx Illegal Rx
ge-0/0/0.0 0 0 0 0
ge-1/1/4.0 0 0 0 0
ge-1/2/1.0 0 0 0 0
ge-1/2/2.0 0 0 0 0
Protocol inet, MTU: 1500, Generation: 1699, Route table: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 10.0.1/24, Local: 10.0.1.1, Broadcast: 10.0.1.255, Generation: 1501
Protocol iso, MTU: 1497, Generation: 1700, Route table: 0
Flags: Is-Primary
Protocol multiservice, MTU: Unlimited, Generation: 1701, Route table: 0
Flags: Is-Primary
Policer: Input: __default_arp_policer__
user@R0> show interfaces ae1.0 extensive
Logical interface ae1.0 (Index 336) (SNMP ifIndex 666) (Generation 826)
Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 707 4 206275 3968
Output: 849981 32979 93602009 29023264
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Link:
ge-0/1/6.0
Input : 148 1 17800 992
Output: 198301 7819 21812806 6880984
ge-1/1/6.0
Input : 134 1 16616 992
Output: 209149 8088 23006390 7117728
ge-1/2/0.0
Input : 136 1 16864 992
Output: 215518 8291 23811445 7296528
ge-1/2/3.0
Input : 289 1 154995 992
Output: 227013 8781 24971368 7728024
Aggregate member links: 4
LACP info: Role System System Port Port Port
priority identifier priority number key
ge-0/1/6.0 Actor 127 3c:61:04:2f:c7:c0 127 2 2
ge-0/1/6.0 Partner 127 3c:61:04:2d:9f:c0 127 2 2
ge-1/1/6.0 Actor 127 3c:61:04:2f:c7:c0 127 6 2
ge-1/1/6.0 Partner 127 3c:61:04:2d:9f:c0 127 6 2
ge-1/2/0.0 Actor 127 3c:61:04:2f:c7:c0 127 7 2
ge-1/2/0.0 Partner 127 3c:61:04:2d:9f:c0 127 7 2
ge-1/2/3.0 Actor 127 3c:61:04:2f:c7:c0 127 10 2
ge-1/2/3.0 Partner 127 3c:61:04:2d:9f:c0 127 10 2
LACP Statistics: LACP Rx LACP Tx Unknown Rx Illegal Rx
ge-0/1/6.0 129 123 0 0
ge-1/1/6.0 127 121 0 0
ge-1/2/0.0 127 123 0 0
ge-1/2/3.0 128 123 0 0
Marker Statistics: Marker Rx Resp Tx Unknown Rx Illegal Rx
ge-0/1/6.0 0 0 0 0
ge-1/1/6.0 0 0 0 0
ge-1/2/0.0 0 0 0 0
ge-1/2/3.0 0 0 0 0
Protocol inet, MTU: 1500, Generation: 1702, Route table: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 10.1.1/24, Local: 10.1.1.1, Broadcast: 10.1.1.255, Generation: 1503
Protocol iso, MTU: 1497, Generation: 1703, Route table: 0
Protocol multiservice, MTU: Unlimited, Generation: 1704, Route table: 0
Policer: Input: __default_arp_policer__
user@R0> show interfaces ae2.0 extensive
Logical interface ae2.0 (Index 337) (SNMP ifIndex 961) (Generation 827)
Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 702 4 224128 3968
Output: 855472 33229 94215862 29243664
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Link:
ge-0/1/8.0
Input : 137 1 16988 992
Output: 213214 8377 23453540 7372232
ge-1/1/5.0
Input : 137 1 16988 992
Output: 212174 8244 23339050 7255368
ge-1/2/8.0
Input : 135 1 16740 992
Output: 210583 8144 23164099 7167296
ge-1/3/3.0
Input : 293 1 173412 992
Output: 219501 8464 24259173 7448768
Aggregate member links: 4
LACP info: Role System System Port Port Port
priority identifier priority number key
ge-0/1/8.0 Actor 127 3c:61:04:2f:c7:c0 127 3 3
ge-0/1/8.0 Partner 127 3c:61:04:2d:9f:c0 127 3 3
ge-1/1/5.0 Actor 127 3c:61:04:2f:c7:c0 127 5 3
ge-1/1/5.0 Partner 127 3c:61:04:2d:9f:c0 127 5 3
ge-1/2/8.0 Actor 127 3c:61:04:2f:c7:c0 127 11 3
ge-1/2/8.0 Partner 127 3c:61:04:2d:9f:c0 127 11 3
ge-1/3/3.0 Actor 127 3c:61:04:2f:c7:c0 127 12 3
ge-1/3/3.0 Partner 127 3c:61:04:2d:9f:c0 127 12 3
LACP Statistics: LACP Rx LACP Tx Unknown Rx Illegal Rx
ge-0/1/8.0 127 123 0 0
ge-1/1/5.0 130 123 0 0
ge-1/2/8.0 129 124 0 0
ge-1/3/3.0 129 124 0 0
Marker Statistics: Marker Rx Resp Tx Unknown Rx Illegal Rx
ge-0/1/8.0 0 0 0 0
ge-1/1/5.0 0 0 0 0
ge-1/2/8.0 0 0 0 0
ge-1/3/3.0 0 0 0 0
Protocol inet, MTU: 1500, Generation: 1705, Route table: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 10.2.1/24, Local: 10.2.1.1, Broadcast: 10.2.1.255, Generation: 1505
Protocol iso, MTU: 1497, Generation: 1706, Route table: 0
Protocol multiservice, MTU: Unlimited, Generation: 1707, Route table: 0
Policer: Input: __default_arp_policer__
意义
当三个聚合以太网捆绑包具有相同的可用带宽时，IS-IS 将平均分配流量。
验证可用带宽上的流量分布不均
目的
验证在按数据包进行负载平衡期间，当其中一个聚合链路关闭时，IS-IS 是否会根据可用带宽不均匀地分配流量。
行动
禁用 ae0 捆绑包上的某个链路，以便 ae0 上的可用带宽为 3g，ae1 和 ae2 上的可用带宽为 4g。在操作模式下，输入命令 show route 198.0.0.1 extensive 。
user@R0> show route 198.0.0.1 extensive
inet.0: 10028 destinations, 10029 routes (10027 active, 0 holddown, 1 hidden)
198.0.0.1/32 (1 entry, 1 announced)
TSI:
KRT in-kernel 198.0.0.1/32 -> {10.0.1.2, 10.1.1.2, 10.2.1.2, 10.3.1.2}
*IS-IS Preference: 18
Level: 2
Next hop type: Router, Next hop index: 1048575
Address: 0x9ec55d0
Next-hop reference count: 20005
Next hop: 10.0.1.2 via ae0.0 weight 0x1 balance 27%
Session Id: 0x1b2
Next hop: 10.1.1.2 via ae1.0 weight 0x1 balance 36%, selected
Session Id: 0x1b1
Next hop: 10.2.1.2 via ae2.0 weight 0x1 balance 36%
Session Id: 0x1b3
Next hop: 10.3.1.2 via ge-0/1/7.0 weight 0xf000
Session Id: 0x1b0
State:<Active Int>
Age: 22 Metric: 20
Validation State: unverified
Task: IS-IS
Announcement bits (1): 0-KRT
AS path: I
user@R0> show interfaces ae0.0 extensive
Logical interface ae0.0 (Index 335) (SNMP ifIndex 625) (Generation 825)
Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 793 3 218290 2976
Output: 1617811 27223 178003101 23957320
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Link:
ge-0/0/0.0
Input : 182 1 21794 992
Output: 461045 9423 50717650 8292776
ge-1/1/4.0 <-- down
Input : 139 0 17236 0
Output: 241334 0 26546740 0
ge-1/2/1.0
Input : 162 1 20088 992
Output: 444340 8979 48918653 7901976
ge-1/2/2.0
Input : 310 1 159172 992
Output: 471092 8821 51820058 7762568
Aggregate member links: 4
LACP info: Role System System Port Port Port
priority identifier priority number key
ge-0/0/0.0 Actor 127 3c:61:04:2f:c7:c0 127 1 1
ge-0/0/0.0 Partner 127 3c:61:04:2d:9f:c0 127 1 1
ge-1/1/4.0 Actor 127 3c:61:04:2f:c7:c0 127 4 1
ge-1/1/4.0 Partner 1 00:00:00:00:00:00 1 4 1
ge-1/2/1.0 Actor 127 3c:61:04:2f:c7:c0 127 8 1
ge-1/2/1.0 Partner 127 3c:61:04:2d:9f:c0 127 8 1
ge-1/2/2.0 Actor 127 3c:61:04:2f:c7:c0 127 9 1
ge-1/2/2.0 Partner 127 3c:61:04:2d:9f:c0 127 9 1
LACP Statistics: LACP Rx LACP Tx Unknown Rx Illegal Rx
ge-0/0/0.0 161 156 0 0
ge-1/1/4.0 151 145 0 0
ge-1/2/1.0 158 154 0 0
ge-1/2/2.0 159 154 0 0
Marker Statistics: Marker Rx Resp Tx Unknown Rx Illegal Rx
ge-0/0/0.0 0 0 0 0
ge-1/1/4.0 0 0 0 0
ge-1/2/1.0 0 0 0 0
ge-1/2/2.0 0 0 0 0
Protocol inet, MTU: 1500, Generation: 1699, Route table: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 10.0.1/24, Local: 10.0.1.1, Broadcast: 10.0.1.255, Generation: 1501
Protocol iso, MTU: 1497, Generation: 1700, Route table: 0
Flags: Is-Primary
Protocol multiservice, MTU: Unlimited, Generation: 1701, Route table: 0
Flags: Is-Primary
Policer: Input: __default_arp_policer__
user@R0> show interfaces ae1.0 extensive
Logical interface ae1.0 (Index 336) (SNMP ifIndex 666) (Generation 826)
Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 817 5 219555 4672
Output: 1756031 35775 193270683 31483104
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Link:
ge-0/1/6.0
Input : 174 1 21024 992
Output: 411469 8414 45261286 7404544
ge-1/1/6.0
Input : 159 1 19716 992
Output: 433700 8893 47707000 7826296
ge-1/2/0.0
Input : 161 1 19964 992
Output: 447338 9190 49314819 8087408
ge-1/2/3.0
Input : 323 2 158851 1696
Output: 463524 9278 50987578 8164856
Aggregate member links: 4
LACP info: Role System System Port Port Port
priority identifier priority number key
ge-0/1/6.0 Actor 127 3c:61:04:2f:c7:c0 127 2 2
ge-0/1/6.0 Partner 127 3c:61:04:2d:9f:c0 127 2 2
ge-1/1/6.0 Actor 127 3c:61:04:2f:c7:c0 127 6 2
ge-1/1/6.0 Partner 127 3c:61:04:2d:9f:c0 127 6 2
ge-1/2/0.0 Actor 127 3c:61:04:2f:c7:c0 127 7 2
ge-1/2/0.0 Partner 127 3c:61:04:2d:9f:c0 127 7 2
ge-1/2/3.0 Actor 127 3c:61:04:2f:c7:c0 127 10 2
ge-1/2/3.0 Partner 127 3c:61:04:2d:9f:c0 127 10 2
LACP Statistics: LACP Rx LACP Tx Unknown Rx Illegal Rx
ge-0/1/6.0 159 153 0 0
ge-1/1/6.0 157 151 0 0
ge-1/2/0.0 157 153 0 0
ge-1/2/3.0 158 153 0 0
Marker Statistics: Marker Rx Resp Tx Unknown Rx Illegal Rx
ge-0/1/6.0 0 0 0 0
ge-1/1/6.0 0 0 0 0
ge-1/2/0.0 0 0 0 0
ge-1/2/3.0 0 0 0 0
Protocol inet, MTU: 1500, Generation: 1702, Route table: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 10.1.1/24, Local: 10.1.1.1, Broadcast: 10.1.1.255, Generation: 1503
Protocol iso, MTU: 1497, Generation: 1703, Route table: 0
Protocol multiservice, MTU: Unlimited, Generation: 1704, Route table: 0
Policer: Input: __default_arp_policer__
user@R0> show interfaces ae2.0 extensive
Logical interface ae2.0 (Index 337) (SNMP ifIndex 961) (Generation 827)
Flags: Up SNMP-Traps 0x4004000 Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 813 4 237569 3968
Output: 1786258 37008 196605473 32568272
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Link:
ge-0/1/8.0
Input : 163 1 20212 992
Output: 446715 9282 49138650 8168408
ge-1/1/5.0
Input : 162 1 20088 992
Output: 443846 9209 48822970 8104224
ge-1/2/8.0
Input : 161 1 19964 992
Output: 443943 9341 48833699 8220624
ge-1/3/3.0
Input : 327 1 177305 992
Output: 451754 9176 49810154 8075016
Aggregate member links: 4
LACP info: Role System System Port Port Port
priority identifier priority number key
ge-0/1/8.0 Actor 127 3c:61:04:2f:c7:c0 127 3 3
ge-0/1/8.0 Partner 127 3c:61:04:2d:9f:c0 127 3 3
ge-1/1/5.0 Actor 127 3c:61:04:2f:c7:c0 127 5 3
ge-1/1/5.0 Partner 127 3c:61:04:2d:9f:c0 127 5 3
ge-1/2/8.0 Actor 127 3c:61:04:2f:c7:c0 127 11 3
ge-1/2/8.0 Partner 127 3c:61:04:2d:9f:c0 127 11 3
ge-1/3/3.0 Actor 127 3c:61:04:2f:c7:c0 127 12 3
ge-1/3/3.0 Partner 127 3c:61:04:2d:9f:c0 127 12 3
LACP Statistics: LACP Rx LACP Tx Unknown Rx Illegal Rx
ge-0/1/8.0 157 153 0 0
ge-1/1/5.0 160 153 0 0
ge-1/2/8.0 159 154 0 0
ge-1/3/3.0 159 154 0 0
Marker Statistics: Marker Rx Resp Tx Unknown Rx Illegal Rx
ge-0/1/8.0 0 0 0 0
ge-1/1/5.0 0 0 0 0
ge-1/2/8.0 0 0 0 0
ge-1/3/3.0 0 0 0 0
Protocol inet, MTU: 1500, Generation: 1705, Route table: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 10.2.1/24, Local: 10.2.1.1, Broadcast: 10.2.1.255, Generation: 1505
Protocol iso, MTU: 1497, Generation: 1706, Route table: 0
Protocol multiservice, MTU: Unlimited, Generation: 1707, Route table: 0
Policer: Input: __default_arp_policer__
意义
IS-IS 推断 ae0 捆绑包只有 3G 可用带宽。因此，根据可用带宽修改每个数据包的负载平衡。根据输出，ae0 上只有 27% 的带宽可用，因为其中一个聚合以太网链路已关闭。因此，IS-IS 会根据可用带宽不平等地分配流量。
验证逻辑接口上的不平等流量分布
目的
验证 IS-IS 是否根据配置的逻辑带宽在逻辑接口上不均匀地分配流量。
行动
user@R0> show interfaces ae1.1
Logical interface ae1.1 (Index 605) (SNMP ifIndex 1910)
Flags: Up SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.1 ] Encapsulation: ENET2
Bandwidth: 2000mbps
Statistics Packets pps Bytes bps
Bundle:
Input : 807 0 200537 360
Output: 277 0 55529 0
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Protocol inet, MTU: 1500
Max nh cache: 75000, New hold nh limit: 75000, Curr nh cnt: 1, Curr new hold cnt: 0, NH drop cnt: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 13.1.1/24, Local: 13.1.1.2, Broadcast: 13.1.1.255
Protocol iso, MTU: 1497
Protocol multiservice, MTU: Unlimited
user@R0> show interfaces ae1.2
Logical interface ae1.2 (Index 606) (SNMP ifIndex 1911)
Flags: Up SNMP-Traps 0x4000 VLAN-Tag [ 0x8100.2 ] Encapsulation: ENET2
Bandwidth: 1000mbps
Statistics Packets pps Bytes bps
Bundle:
Input : 836 0 208643 720
Output: 305 0 61006 0
Adaptive Statistics:
Adaptive Adjusts: 0
Adaptive Scans : 0
Adaptive Updates: 0
Protocol inet, MTU: 1500
Max nh cache: 75000, New hold nh limit: 75000, Curr nh cnt: 1, Curr new hold cnt: 0, NH drop cnt: 0
Flags: Sendbcast-pkt-to-re
Addresses, Flags: Is-Preferred Is-Primary
Destination: 13.2.1/24, Local: 13.2.1.2, Broadcast: 13.2.1.255
Protocol iso, MTU: 1497
Protocol multiservice, MTU: Unlimited