示例：节点链路保护配置
图 1：节点链路保护拓扑图
图 1 显示了如何实现节点链路保护的示例。LSP 在路由器 0 上启动，具有通过路由器 1、路由器 2、路由器 3 和路由器 4 的严格路径。您可以在 LSP 中配置节点链路保护，并在路径中的所有 RSVP 接口上配置链路保护。
在路由器 0 上，将 LSP 配置为跨路由器 1、2、3 和 4 传输。将该 node-link-protection 语句包含在 LSP 中，并在传出 RSVP 接口 fe-0/1/1上配置链路保护。要支持 LSP，请在所需的接口上配置 OSPF、MPLS 和 RSVP。
路由器 0
[edit]
interfaces {
fe-0/1/1 {
unit 0 {
family inet {
address 10.11.1.10/30;
}
family mpls;
}
}
so-0/0/2 {
unit 0 {
family inet {
address 10.11.1.22/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.220/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/1.0;
interface so-0/0/2.0;
}
traffic-engineering;
}
mpls {
statistics {
file mplsStat.log size 1m;
interval 30;
display-id;
}
traffic-engineering bgp-igp-both-ribs;
traceoptions {
file mpls.log size 5m world-readable;
flag cspf;
flag cspf-link;
flag cspf-node;
flag state;
flag error;
}
explicit-null;
label-switched-path test_r0_r4 {
from 10.255.11.220;
to 10.255.11.215;
node-link-protection; # Apply node-link protection to the LSP.
primary pathP;
}
path pathP {# Define the LSP path across routers 1, 2, 3, and 4.
10.11.1.9 strict;
10.11.1.2 strict;
10.11.2.1 strict;
10.11.2.10 strict;
}
interface fe-0/1/1.0;
interface so-0/0/2.0;
}
rsvp {
traceoptions {
file rsvp.log size 3m files 12 world-readable;
flag event;
flag state;
flag error;
flag packets detail;
}
interface fe-0/1/1.0 {
link-protection; # Apply link protection to RSVP interfaces in the LSP path.
}
interface so-0/0/2.0;
}
}
在路由器 1 上，在传出 RSVP 接口 so-0/0/3. 上配置链路保护 在所有中转接口上配置 OSPF、MPLS 和 RSVP。
路由器 1
[edit]
interfaces {
fe-0/1/0 {
unit 0 {
family inet {
address 10.11.3.1/30;
}
family mpls;
}
}
fe-2/2/1 {
unit 0 {
family inet {
address 10.11.1.9/30;
}
family mpls;
}
}
so-0/0/3 {
unit 0 {
family inet {
address 10.11.1.1/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.223/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/0.0;
interface fe-2/2/1.0;
interface so-0/0/3.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface fe-0/1/0.0;
interface fe-2/2/1.0;
interface so-0/0/3.0;
}
rsvp {
interface fe-0/1/0.0;
interface fe-2/2/1.0;
interface so-0/0/3.0 {
link-protection; # Apply link protection on all RSVP interfaces in the LSP path.
}
}
}
在路由器 2 上，在传出 RSVP 接口 so-0/0/0. 上配置链路保护 在所有传输接口上配置 OSPF、MPLS 和 RSVP。
路由器 2
[edit]
interfaces {
so-0/0/0 {
unit 0 {
family inet {
address 10.11.2.2/30;
}
family mpls;
}
}
so-0/0/2 {
unit 0 {
family inet {
address 10.11.1.21/30;
}
family mpls;
}
}
so-0/0/3 {
unit 0 {
family inet {
address 10.11.1.2/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.218/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface so-0/0/0.0;
interface so-0/0/2.0;
interface so-0/0/3.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface so-0/0/0.0;
interface so-0/0/2.0;
interface so-0/0/3.0;
}
rsvp {
interface so-0/0/0.0 {
link-protection; # Apply link protection to RSVP interfaces in the LSP path.
}
interface so-0/0/2.0;
interface so-0/0/3.0;
}
}
在路由器 3 上，在传出 RSVP 接口 fe-0/1/2. 上配置链路保护 在所有传输接口上配置 OSPF、MPLS 和 RSVP。
路由器 3
[edit]
interfaces {
fe-0/1/0 {
unit 0 {
family inet {
address 10.11.3.2/30;
}
family mpls;
}
}
fe-0/1/2 {
unit 0 {
family inet {
address 10.11.2.9/30;
}
family mpls;
}
}
so-0/0/0 {
unit 0 {
family inet {
address 10.11.2.1/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.216/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/0.0;
interface fe-0/1/2.0;
interface so-0/0/0.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface fe-0/1/0.0;
interface fe-0/1/2.0;
interface so-0/0/0.0;
}
rsvp {
interface fe-0/1/0.0;
interface fe-0/1/2.0 {
link-protection; # Apply link protection to RSVP interfaces in the LSP path.
}
interface so-0/0/0.0;
}
}
由于路由器 4 是 LSP 的端点，因此您可以照常配置接口和协议。无需在此路由器上配置任何节点链路保护或链路保护语句。
路由器 4
[edit]
interfaces {
fe-0/1/2 {
unit 0 {
family inet {
address 10.11.2.10/30;
}
family mpls;
}
}
lo0 {
unit 0 {
family inet {
address 10.255.11.215/32;
}
}
}
}
protocols {
ospf {
area 0.0.0.0 {
interface lo0.0 {
passive;
}
interface fe-0/1/2.0;
}
traffic-engineering;
}
mpls {
traffic-engineering bgp-igp-both-ribs;
explicit-null;
interface fe-0/1/2.0;
}
rsvp {
interface fe-0/1/2.0;
}
}
验证您的工作
要验证 MPLS LSP 节点链路保护的正常运行，请使用以下命令：
show mpls lsp extensiveshow route detailshow rsvp neighbor detailshow rsvp session detail
以下部分显示了与配置示例一起使用的这些命令的输出。
user@router0> show rsvp session detail
Ingress RSVP: 2 sessions
10.255.11.215
From: 10.255.11.220, LSPstate: Up, ActiveRoute: 5
LSPname: test_r0_r4, LSPpath: Primary
Suggested label received: -, Suggested label sent: -
Recovery label received: -, Recovery label sent: 100128
Resv style: 1 SE, Label in: -, Label out: 100128
Time left: -, Since: Thu May 8 13:36:58 2003
Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
Port number: sender 3 receiver 56517 protocol 0
Node/Link protection desired
Type: Node/Link protected LSP
PATH rcvfrom: localclient
PATH sentto: 10.11.1.9 (fe-0/1/1.0) 20 pkts
RESV rcvfrom: 10.11.1.9 (fe-0/1/1.0) 37 pkts
Explct route: 10.11.1.9 10.11.1.2 10.11.2.1 10.11.2.10
Record route: <self> 10.11.1.9 10.11.1.2 10.11.2.1 10.11.2.10
10.255.11.218
From: 10.255.11.220, LSPstate: Up, ActiveRoute: 0
LSPname: Bypass->10.11.1.9->10.11.1.2 # 2 next hops indicate node-link protection.
Suggested label received: -, Suggested label sent: -
Recovery label received: -, Recovery label sent: 0
Resv style: 1 SE, Label in: -, Label out: 0
Time left: -, Since: Thu May 8 13:36:58 2003
Tspec: rate 0bps size 0bps peak Infbps m 20 M 1500
Port number: sender 1 receiver 56521 protocol 0
Type: Bypass LSP
Number of data route tunnel through: 4
Number of RSVP session tunnel through: 0
PATH rcvfrom: localclient
PATH sentto: 10.11.1.21 (so-0/0/2.0) 1 pkts
RESV rcvfrom: 10.11.1.21 (so-0/0/2.0) 1 pkts
Explct route: 10.11.1.21
Record route: <self> 10.11.1.21
Total 2 displayed, Up 2, Down 0
Egress RSVP: 0 sessions
Total 0 displayed, Up 0, Down 0
Transit RSVP: 0 sessions
Total 0 displayed, Up 0, Down 0
该 show mpls lsp extensive 命令提供了一些有关链路保护和节点链路保护的有用信息。保护标志条目指示一系列值。通过将这些值相加，您可以根据总和了解 LSP 的保护状态。标志的重要值包括：1 = 可用（链路保护），2 = 正在使用，8 = 节点保护。因此，值 9 表示节点保护可用 （1 + 8 = 9），值 A 表示正在使用受节点保护的链路（8 + 2 = A十六进制）。
user@router0> show mpls lsp extensive
Ingress LSP: 1 sessions
10.255.11.215
From: 10.255.11.220, State: Up, ActiveRoute: 5, LSPname: test_r0_r4
ActivePath: pathP (primary)
Node/Link protection desired
LoadBalance: Random
Encoding type: Packet, Switching type: Packet, GPID: IPv4
*Primary pathP State: Up
OptimizeTimer: 30
Reoptimization in 13 second(s).
Computed ERO (S [L] denotes strict [loose] hops): (CSPF metric: 40)
10.11.1.9 S 10.11.1.2 S 10.11.2.1 S 10.11.2.10 S
Received RRO (ProtectionFlag 1=Available 2=InUse 4=B/W 8=Node):
10.11.1.9(flag=9 Label=100128) 10.11.1.2(flag=9 Label=100080) 10.11.2.1(flag=1 Label=100080) 10.11.2.10(Label=0)
67 May 8 13:46:14 CSPF: computation result ignored[18 times]
66 May 8 13:37:31 Record Route: 10.11.1.9(flag=9 Label=100128) 10.11.1.2(flag=9 Label=100080) 10.11.2.1(flag=1 Label=100080) 10.11.2.10(Label=0)
65 May 8 13:37:28 CSPF: computation result ignored
64 May 8 13:37:07 Record Route: 10.11.1.9(flag=9 Label=100128) 10.11.1.2(flag=1 Label=100080) 10.11.2.1(Label=100080) 10.11.2.10(Label=0)
63 May 8 13:37:01 Record Route: 10.11.1.9(flag=9 Label=100128) 10.11.1.2(Label=100080) 10.11.2.1(Label=100080) 10.11.2.10(Label=0)
62 May 8 13:37:01 Link-protection Up
61 May 8 13:36:58 Selected as active path
60 May 8 13:36:58 Record Route: 10.11.1.9(Label=100128) 10.11.1.2(Label=100080) 10.11.2.1(Label=100080) 10.11.2.10(Label=0)
59 May 8 13:36:58 Up
58 May 8 13:36:58 Originate Call
57 May 8 13:36:58 CSPF: computation result accepted
56 May 8 13:36:29 CSPF failed: no route toward 10.11.2.10[10 times]
55 May 8 13:32:04 Clear Call
54 May 8 13:31:40 Deselected as active
53 May 8 13:31:40 Link-protection Down
52 May 8 13:31:40 Down
51 May 8 13:31:36 CSPF failed: no route toward 10.11.2.10[6 times]
50 May 8 13:29:00 10.11.2.1: Session preempted
49 May 8 13:28:42 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100064) 10.11.2.1(Label=100064) 10.11.2.10(Label=0)
48 May 8 13:28:40 CSPF failed: no route toward 10.11.2.10
47 May 8 13:28:35 Link-protection Up
46 May 8 13:28:35 Link-protection Down
45 May 8 13:28:30 Link-protection Up
44 May 8 13:28:30 Link-protection Down
43 May 8 13:28:10 CSPF failed: no route toward 10.11.2.10
42 May 8 13:27:44 Link-protection Up
41 May 8 13:27:44 Link-protection Down
40 May 8 13:27:42 Link-protection Up
39 May 8 13:27:42 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100064) 10.11.2.1(flag=1 Label=100064) 10.11.2.10(Label=0)
38 May 8 13:27:41 CSPF failed: no route toward 10.11.2.10[2 times]
37 May 8 13:27:39 CSPF: link down/deleted 10.11.2.9(eagle.00/10.255.11.216)->0.0.0.0(eagle.04/0.0.0.0)
36 May 8 13:27:39 Link-protection Down
35 May 8 13:27:39 Record Route: 10.11.1.9(Label=100064) 10.11.1.2(Label=100064) 10.11.2.1(Label=100064) 10.11.2.10(Label=0)
34 May 8 13:27:39 CSPF failed: no route toward 10.11.2.10
33 May 8 13:27:39 CSPF: link down/deleted 0.0.0.0(eagle.04/0.0.0.0)->0.0.0.0(papst.00/10.255.11.215)
32 May 8 13:27:12 CSPF: computation result ignored[16 times]
31 May 8 13:19:35 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100048) 10.11.2.1(flag=1 Label=100048) 10.11.2.10(Label=0)
30 May 8 13:19:22 Link-protection Up
29 May 8 13:19:22 Record Route: 10.11.1.9(flag=9 Label=100064) 10.11.1.2(flag=9 Label=100048) 10.11.2.1(Label=100048) 10.11.2.10(Label=0)
28 May 8 13:19:22 Up
27 May 8 13:19:22 Link-protection Down
26 May 8 13:19:22 CSPF: computation result accepted
25 May 8 13:19:16 Link-protection Up
24 May 8 13:19:16 Link-protection Down
23 May 8 13:18:54 CSPF failed: no route toward 10.11.2.1
22 May 8 13:18:54 CSPF: link down/deleted 0.0.0.0(eagle.04/0.0.0.0)->0.0.0.0(papst.00/10.255.11.215)
21 May 8 13:18:53 CSPF failed: no route toward 10.11.2.1[2 times]
20 May 8 13:18:46 CSPF: link down/deleted 10.11.2.9(eagle.00/10.255.11.216)->0.0.0.0(eagle.04/0.0.0.0)
19 May 8 13:18:35 Record Route: 10.11.1.9(flag=9 Label=100032) 10.11.1.2(flag=9 Label=100032) 10.11.2.1(Label=100016) 10.11.2.10(Label=0)
18 May 8 13:18:35 Record Route: 10.11.1.9(flag=9 Label=100032) 10.11.1.2(Label=100032) 10.11.2.1(Label=100016) 10.11.2.10(Label=0)
Created: Thu May 8 13:13:28 2003
Total 1 displayed, Up 1, Down 0
Egress LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
Transit LSP: 0 sessions
Total 0 displayed, Up 0, Down 0
user@router0> show rsvp neighbor detail
RSVP neighbor: 2 learned
Address: 10.11.1.9 via: fe-0/1/1.0 status: Up
Last changed time: 33:02, Idle: 5 sec, Up cnt: 1, Down cnt: 0
Message received: 130
Hello: sent 221, received: 221, interval: 9 sec
Remote instance: 0x66368e80, Local instance: 0x643f57b5
Refresh reduction: incomplete
Remote end: enabled, Ack-extension: disabled
Address: 10.11.1.21 via: so-0/0/2.0 status: Up
Last changed time: 32:41, Idle: 10 sec, Up cnt: 1, Down cnt: 0
Message received: 78
Hello: sent 218, received: 218, interval: 9 sec
Remote instance: 0x74b57f2a, Local instance: 0x66341d2f
Refresh reduction: operational
Remote end: enabled, Ack-extension: enabled
user@router0> show route 10.255.11.215 detail
inet.0: 33 destinations, 34 routes (31 active, 0 holddown, 2 hidden)
10.255.11.215/32 (2 entries, 1 announced)
State: <FlashAll>
*RSVP Preference: 7
Next hop: 10.11.1.9 via fe-0/1/1.0 weight 1, selected
Label-switched-path test_r0_r4
Label operation: Push 100128, selfID=RSVP-7
Next hop: via so-0/0/2.0 weight 20001
Label-switched-path Bypass->10.11.1.9->10.11.1.2
Label operation: Push 100080, selfID=RSVP-7, parentID=RSVP-8
State: <Active Int>
Local AS: 69
Age: 13:14 Metric: 40
Task: RSVP
Announcement bits (2): 0-KRT 3-Resolve inet.0
AS path: I
IS-IS Preference: 18
Level: 2
Next hop: 10.11.1.9 via fe-0/1/1.0, selected
State: <Int>
Inactive reason: Route Preference
Local AS: 69
Age: 13:20 Metric: 40
Task: IS-IS
AS path: I
inet.3: 2 destinations, 2 routes (2 active, 0 holddown, 0 hidden)
10.255.11.215/32 (1 entry, 1 announced)
State: <FlashAll>
*RSVP Preference: 7
Next hop: 10.11.1.9 via fe-0/1/1.0 weight 1, selected
Label-switched-path test_r0_r4
Label operation: Push 100128, selfID=RSVP-7
Next hop: via so-0/0/2.0 weight 20001
Label-switched-path Bypass->10.11.1.9->10.11.1.2
Label operation: Push 100080, selfID=RSVP-7, parentID=RSVP-8
State: <Active Int>
Local AS: 69
Age: 13:14 Metric: 40
Task: RSVP
Announcement bits (1): 1-Resolve inet.0
AS path: I