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Table of Contents Expand all

play_arrow 概述
- play_arrow 了解 MPLS
  - MPLS 概述
- play_arrow 支持的标准
  - 支持的 MPLS 标准
play_arrow MPLS 配置
- play_arrow 配置 MPLS
- play_arrow 配置 MPLS 隧道
  - IPv6-over-IPv4 隧道
  - 基于下一跳的动态隧道
play_arrow MPLS 流量
- play_arrow 管理 MPLS 流量
- play_arrow 保护 MPLS 流量
  - MPLS LSP 的节点和路径保护
  - 面向 MPLS LSP 的链路保护
- play_arrow 测量 MPLS 流量
  - 收集有关 MPLS 会话的统计信息
play_arrow MPLS LSP
- play_arrow 了解 MPLS LSP
- play_arrow 配置 MPLS LSP
play_arrow MPLS 信令协议
- play_arrow RSVP
  - 回复概述
  - RSVP 配置
- play_arrow LDP
play_arrow MPLS 流量工程
- play_arrow 配置 MPLS 信息流工程
play_arrow MPLS 传输配置文件
- play_arrow MPLS 的操作、管理和维护（OAM）
  - MPLS OAM 配置
- play_arrow MPLS 伪线
  - MPLS 伪线配置
  - 伪线头端接（PWHT）配置
- play_arrow MPLS 的服务等级（CoS）
  - MPLS 服务等级配置
- play_arrow 广义 MPLS （GMPLS）
  - GMPLS 配置
play_arrow MPLS VPN 和电路
- play_arrow MPLS 以太网（L2 电路）
  - 了解 MPLS 以太网（L2 电路）
  - 通过 MPLS 配置以太网（第 2 层电路）
- play_arrow CCC、TCC 和 2.5 层交换
  - CCC、TCC 和基于 MPLS 的以太网配置
play_arrow 面向软件定义网络（SDN）的 MPLS
- play_arrow 路径计算元素协议 (PCEP)
  - PCEP 配置
play_arrow MPLS 故障排除
- play_arrow MPLS 故障排除
  - MPLS 故障排除
play_arrow 配置语句和操作命令
- Junos CLI 参考概述

list Table of Contents

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示例：在 OSPF 网络中通过 SR-TE 建立隧道 LDP

date_range 18-Jan-25

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概述

此示例说明如何在 OSPF 网络中配置 SR-TE 上的 LDP 隧道。这通过验证是否启用了基于 SR-TE 的 LDP 隧道以及到远程边缘设备的 LDP 隧道是否采用了正确的路径来说明这一点。它还显示，到远程边缘设备的路由使用 LDP 转发，并通过 SR-TE 建立隧道。在以下拓扑（图 1）中，PE1 和 PE2 是仅支持 IPv4 设备 CE1 和 CE2 的入口和出口设备。设备 R1、R2、R3 和 R4 构成了仅支持 IPv4 的 SR-TE 核心网络。拓扑显示了两个 LDP 域：LDP 域由设备 CE1 和 PE1 组成;LDP 域 B 由设备 PE2 和 CE2 组成。LDP 域连接到 SR-TE 核心网络，后者通过在 SR-TE 上建立隧道，从而将 LSP 会话扩展到核心。

拓扑学

图 1：在 OSPF 网络中通过 SR-TE 建立隧道 LDP

要求

此示例使用以下硬件和软件组件：

MX 系列路由器可作为 CE、PE 和核心路由器。
在所有设备上运行的 Junos OS 22.4R1 或更高版本。

配置

要在核心网络中通过 SR-TE 传输 LDP LSP 隧道，请执行以下操作：

CLI 快速配置
配置 PE1
配置 R1 设备

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 [edit] 层级的 CLI 中，然后从配置模式进入 commit 。

注：配置 enhanced-ip 语句并提交配置时，将显示以下警告消息，提示您重新启动路由器：

content_copy zoom_out_map
'chassis'
WARNING: Chassis configuration for network services has been changed. A system reboot is mandatory. Please reboot the system NOW. Continuing without a reboot might result in unexpected system behavior.
commit complete

重新启动将显示路由器上的 FPC。

设备 CE1

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set chassis network-services enhanced-ip
set interfaces ge-0/0/1 description CE1-to-PE1
set interfaces ge-0/0/1 unit 0 family inet address 10.1.1.1/24
set interfaces lo0 unit 0 family inet address 192.168.100.11/32
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive
set routing-options router-id 192.168.100.11

设备 PE1

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set chassis network-services enhanced-ip
set interfaces ge-0/0/1 description PE1-to-CE1
set interfaces ge-0/0/1 unit 0 family inet address 10.1.1.2/24
set interfaces ge-0/0/1 unit 0 family mpls maximum-labels 8
set interfaces ge-0/0/3 description PE1-to-R1
set interfaces ge-0/0/3 unit 0 family inet address 10.1.2.1/24
set interfaces ge-0/0/3 unit 0 family mpls maximum-labels 8
set interfaces lo0 unit 0 family inet address 192.168.100.5/32
set interfaces lo0 unit 0 family mpls
set policy-options policy-statement export_bgp term a from protocol bgp
set policy-options policy-statement export_bgp term a from protocol direct
set policy-options policy-statement export_bgp term a then accept
set routing-instances CE1_vpn1 instance-type vrf
set routing-instances CE1_vpn1 protocols ospf area 0.0.0.0 interface ge-0/0/1.0
set routing-instances CE1_vpn1 protocols ospf export export_bgp
set routing-instances CE1_vpn1 interface ge-0/0/1.0
set routing-instances CE1_vpn1 route-distinguisher 192.168.100.5:1
set routing-instances CE1_vpn1 vrf-target target:100:4
set routing-instances CE1_vpn1 vrf-table-label
set routing-options router-id 192.168.100.5
set routing-options autonomous-system 65410
set protocols bgp group ibgp1 type internal
set protocols bgp group ibgp1 local-address 192.168.100.5
set protocols bgp group ibgp1 family inet unicast
set protocols bgp group ibgp1 family inet-vpn unicast
set protocols bgp group ibgp1 neighbor 192.168.100.6
set protocols ldp interface ge-0/0/3.0
set protocols ldp interface lo0.0
set protocols mpls interface ge-0/0/3.0
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 point-to-point
set protocols ospf area 0.0.0.0 interface lo0.0 passive

设备 R1

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set chassis network-services enhanced-ip
set interfaces ge-0/0/1 description R1-to-R2
set interfaces ge-0/0/1 unit 0 family inet address 10.1.3.1/24
set interfaces ge-0/0/1 unit 0 family mpls maximum-labels 8
set interfaces ge-0/0/2 description R1-to-R3
set interfaces ge-0/0/2 unit 0 family inet address 10.1.4.1/24
set interfaces ge-0/0/2 unit 0 family mpls maximum-labels 8
set interfaces ge-0/0/3 description R1-to-PE1
set interfaces ge-0/0/3 unit 0 family inet address 10.1.2.2/24
set interfaces ge-0/0/3 unit 0 family mpls maximum-labels 8
set interfaces lo0 unit 0 family inet address 192.168.100.1/32
set interfaces lo0 unit 0 family mpls
set routing-options router-id 192.168.100.1
set protocols ldp auto-targeted-session
set protocols ldp preference 1
set protocols ldp interface ge-0/0/1.0
set protocols ldp interface ge-0/0/3.0
set protocols ldp interface lo0.0
set protocols mpls interface ge-0/0/1.0
set protocols mpls interface ge-0/0/2.0
set protocols mpls interface ge-0/0/3.0
set protocols ospf backup-spf-options use-post-convergence-lfa
set protocols ospf backup-spf-options use-source-packet-routing
set protocols ospf traffic-engineering l3-unicast-topology
set protocols ospf traffic-engineering credibility-protocol-preference
set protocols ospf traffic-engineering advertisement always
set protocols ospf traffic-engineering tunnel-source-protocol spring-te
set protocols ospf source-packet-routing node-segment ipv4-index 5001
set protocols ospf source-packet-routing srgb start-label 80000
set protocols ospf source-packet-routing srgb index-range 50000
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment protected index 108
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment unprotected index 110
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment protected index 104
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment unprotected index 106
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 ipv4-adjacency-segment protected index 100
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 ipv4-adjacency-segment unprotected index 102
set protocols ospf area 0.0.0.0 interface lo0.0 passive
set protocols source-packet-routing segment-list seg1 inherit-label-nexthops
set protocols source-packet-routing segment-list seg1 auto-translate
set protocols source-packet-routing segment-list seg1 hop1 ip-address 10.1.4.2
set protocols source-packet-routing segment-list seg1 hop2 ip-address 10.1.5.2
set protocols source-packet-routing segment-list seg1 hop3 ip-address 10.1.6.2
set protocols source-packet-routing source-routing-path sr_static_r5 ldp-tunneling
set protocols source-packet-routing source-routing-path sr_static_r5 to 192.168.100.2
set protocols source-packet-routing source-routing-path sr_static_r5 binding-sid 1003001
set protocols source-packet-routing source-routing-path sr_static_r5 primary seg1

设备 R2

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set chassis network-services enhanced-ip
set interfaces ge-0/0/1 description R2-to-R1
set interfaces ge-0/0/1 unit 0 family inet address 10.1.3.2/24
set interfaces ge-0/0/1 unit 0 family mpls maximum-labels 8
set interfaces ge-0/0/2 description R2-to-R4
set interfaces ge-0/0/2 unit 0 family inet address 10.1.6.2/24
set interfaces ge-0/0/2 unit 0 family mpls maximum-labels 8
set interfaces ge-0/0/3 description R2-to-PE2
set interfaces ge-0/0/3 unit 0 family inet address 10.1.7.1/24
set interfaces ge-0/0/3 unit 0 family mpls maximum-labels 8
set interfaces lo0 unit 0 family inet address 192.168.100.2/32
set interfaces lo0 unit 0 family mpls
set routing-options router-id 192.168.100.2
set protocols ldp auto-targeted-session
set protocols ldp preference 1
set protocols ldp interface ge-0/0/1.0
set protocols ldp interface ge-0/0/3.0
set protocols ldp interface lo0.0
set protocols mpls interface ge-0/0/1.0
set protocols mpls interface ge-0/0/2.0
set protocols mpls interface ge-0/0/3.0
set protocols ospf backup-spf-options use-post-convergence-lfa
set protocols ospf backup-spf-options use-source-packet-routing
set protocols ospf traffic-engineering l3-unicast-topology
set protocols ospf traffic-engineering credibility-protocol-preference
set protocols ospf traffic-engineering advertisement always
set protocols ospf traffic-engineering tunnel-source-protocol spring-te
set protocols ospf source-packet-routing node-segment ipv4-index 5002
set protocols ospf source-packet-routing srgb start-label 80000
set protocols ospf source-packet-routing srgb index-range 50000
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment protected index 500
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment unprotected index 502
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment protected index 504
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment unprotected index 506
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 ipv4-adjacency-segment protected index 508
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 ipv4-adjacency-segment unprotected index 510
set protocols ospf area 0.0.0.0 interface lo0.0 passive
set protocols source-packet-routing segment-list seg1 inherit-label-nexthops
set protocols source-packet-routing segment-list seg1 auto-translate
set protocols source-packet-routing segment-list seg1 hop1 ip-address 10.1.6.1
set protocols source-packet-routing segment-list seg1 hop2 ip-address 10.1.5.1
set protocols source-packet-routing segment-list seg1 hop3 ip-address 10.1.4.1
set protocols source-packet-routing source-routing-path sr_static_r1 ldp-tunneling
set protocols source-packet-routing source-routing-path sr_static_r1 to 192.168.100.1
set protocols source-packet-routing source-routing-path sr_static_r1 binding-sid 1003001
set protocols source-packet-routing source-routing-path sr_static_r1 primary seg1

设备 R3

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set chassis network-services enhanced-ip
set interfaces ge-0/0/1 description R3-to-R4
set interfaces ge-0/0/1 unit 0 family inet address 10.1.5.1/24
set interfaces ge-0/0/1 unit 0 family mpls
set interfaces ge-0/0/2 description R3-to-R1
set interfaces ge-0/0/2 unit 0 family inet address 10.1.4.2/24
set interfaces ge-0/0/2 unit 0 family mpls
set interfaces lo0 unit 0 family inet address 192.168.100.3/32
set interfaces lo0 unit 0 family mpls
set routing-options router-id 192.168.100.3
set protocols mpls interface ge-0/0/1.0
set protocols mpls interface ge-0/0/2.0
set protocols ospf backup-spf-options use-post-convergence-lfa
set protocols ospf backup-spf-options use-source-packet-routing
set protocols ospf traffic-engineering l3-unicast-topology
set protocols ospf traffic-engineering credibility-protocol-preference
set protocols ospf traffic-engineering advertisement always
set protocols ospf source-packet-routing node-segment ipv4-index 5003
set protocols ospf source-packet-routing srgb start-label 80000
set protocols ospf source-packet-routing srgb index-range 50000
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment protected index 204
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment unprotected index 206
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment protected index 200
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment unprotected index 202
set protocols ospf area 0.0.0.0 interface lo0.0 passive

设备 R4

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set chassis network-services enhanced-ip
set interfaces ge-0/0/1 description R4-to-R3
set interfaces ge-0/0/1 unit 0 family inet address 10.1.5.2/24
set interfaces ge-0/0/1 unit 0 family mpls
set interfaces ge-0/0/2 description R4-to-R2
set interfaces ge-0/0/2 unit 0 family inet address 10.1.6.1/24
set interfaces ge-0/0/2 unit 0 family mpls
set interfaces lo0 unit 0 family inet address 192.168.100.4/32
set interfaces lo0 unit 0 family mpls
set routing-options router-id 192.168.100.4
set protocols mpls interface ge-0/0/1.0
set protocols mpls interface ge-0/0/2.0
set protocols ospf backup-spf-options use-post-convergence-lfa
set protocols ospf backup-spf-options use-source-packet-routing
set protocols ospf traffic-engineering l3-unicast-topology
set protocols ospf traffic-engineering credibility-protocol-preference
set protocols ospf traffic-engineering advertisement always
set protocols ospf source-packet-routing node-segment ipv4-index 5004
set protocols ospf source-packet-routing srgb start-label 80000
set protocols ospf source-packet-routing srgb index-range 50000
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment protected index 300
set protocols ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment unprotected index 302
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 point-to-point
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 post-convergence-lfa
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment protected index 304
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment unprotected index 306
set protocols ospf area 0.0.0.0 interface lo0.0 passive

设备 PE2

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set chassis network-services enhanced-ip
set interfaces ge-0/0/2 description PE2-to-CE2
set interfaces ge-0/0/2 unit 0 family inet address 10.1.8.1/24
set interfaces ge-0/0/2 unit 0 family mpls maximum-labels 8
set interfaces ge-0/0/3 description PE2-to-R2
set interfaces ge-0/0/3 unit 0 family inet address 10.1.7.2/24
set interfaces ge-0/0/3 unit 0 family mpls maximum-labels 8
set interfaces lo0 unit 0 family inet address 192.168.100.6/32
set interfaces lo0 unit 0 family mpls
set policy-options policy-statement export_bgp term a from protocol bgp
set policy-options policy-statement export_bgp term a from protocol direct
set policy-options policy-statement export_bgp term a then accept
set routing-instances CE2_vpn1 instance-type vrf
set routing-instances CE2_vpn1 protocols ospf area 0.0.0.0 interface ge-0/0/2.0
set routing-instances CE2_vpn1 protocols ospf export export_bgp
set routing-instances CE2_vpn1 interface ge-0/0/2.0
set routing-instances CE2_vpn1 route-distinguisher 192.168.100.6:1
set routing-instances CE2_vpn1 vrf-target target:100:4
set routing-instances CE2_vpn1 vrf-table-label
set routing-options router-id 192.168.100.6
set routing-options autonomous-system 65410
set protocols bgp group ibgp1 type internal
set protocols bgp group ibgp1 local-address 192.168.100.6
set protocols bgp group ibgp1 family inet unicast
set protocols bgp group ibgp1 family inet-vpn unicast
set protocols bgp group ibgp1 neighbor 192.168.100.5
set protocols ldp interface ge-0/0/3.0  
set protocols ldp interface lo0.0
set protocols mpls interface ge-0/0/3.0
set protocols ospf area 0.0.0.0 interface ge-0/0/3.0 point-to-point
set protocols ospf area 0.0.0.0 interface lo0.0 passive

设备 CE2

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set chassis network-services enhanced-ip
set interfaces ge-0/0/1 description CE2-to-PE2
set interfaces ge-0/0/2 unit 0 family inet address 10.1.8.2/24
set interfaces lo0 unit 0 family inet address 192.168.100.22/32
set protocols ospf area 0.0.0.0 interface ge-0/0/2.0
set protocols ospf area 0.0.0.0 interface lo0.0 passive
set routing-options router-id 192.168.100.22

配置 PE1

分步过程
结果

分步过程

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。

要配置设备 PE1：

将网络服务模式配置为增强型 IP。增强型 IP 将路由器的网络服务设置为增强型 Internet 协议，并使用增强模式功能。
```
[edit chassis]
user@PE1#set network-services enhanced-ip
```

配置设备的接口。

content_copy zoom_out_map
[edit interfaces]
user@PE1#set ge-0/0/1 description PE1-to-CE1
user@PE1#set ge-0/0/1 unit 0 family inet address 10.1.1.2/24
user@PE1#set ge-0/0/3 description PE1-to-R1
user@PE1#set ge-0/0/3 unit 0 family inet address 10.1.2.1/24
user@PE1#set ge-0/0/3 unit 0 family mpls
user@PE1#set lo0 unit 0 family inet address 192.168.100.5/32
user@PE1#set lo0 unit 0 family mpls

配置策略选项以将 BGP 路由导出到客户边缘路由器，在此示例中，客户边缘路由器运行 OSPF 协议。

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[edit policy-options]
user@PE1#set policy-statement export_bgp term a from protocol bgp
user@PE1#set policy-statement export_bgp term a from protocol direct
user@PE1#set policy-statement export_bgp term a then accept

配置第 3 层 VPN 路由实例以支持基于 OSPF 的 CE1 设备。

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[edit routing-instances]
user@PE1#set CE1_vpn1 instance-type vrf
user@PE1#set CE1_vpn1 protocols ospf area 0.0.0.0 interface ge-0/0/1.0
user@PE1#set CE1_vpn1 protocols ospf export export_bgp
user@PE1#set CE1_vpn1 interface ge-0/0/1.0
user@PE1#set CE1_vpn1 route-distinguisher 192.168.100.5:1
user@PE1#set CE1_vpn1 vrf-target target:100:4
user@PE1#set CE1_vpn1 vrf-table-label

配置设备 PE1 的路由器 ID 和自治系统编号。

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[edit routing-options]
user@PE1#set router-id 192.168.100.5
userPE1# set autonomous-system 65410

在连接到核心网络的接口上配置 OSPF、LDP 和 MPLS。

content_copy zoom_out_map
[edit protocols]
user@PE1#set ospf area 0.0.0.0 interface ge-0/0/3.0 point-to-point
user@PE1#set ospf area 0.0.0.0 lo0.0 passive
user@PE1#set ldp interface ge-0/0/3.0
user@PE1#set ldp interface lo0.0
user@PE1#set mpls interface ge-0/0/3.0
user@PE1#set mpls interface lo0.0

在 PE 设备之间配置 BGP。

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[edit protocols]
user@PE1#set bgp group ibgp1 type internal
user@PE1#set bgp group ibgp1 local-address 192.168.100.5
user@PE1#set bgp group ibgp1 family inet unicast
user@PE1#set bgp group ibgp1 family inet-vpn unicast
user@PE1#set bgp group ibgp1 neighbor 192.168.100.6

结果

在配置模式下，输入 show chassis、 show interfaces、 show policy-options、 show routing-instances和show routing-optionsshow protocols命令确认您的配置。如果输出未显示预期的配置，请重复此示例中的说明，以便进行更正。

content_copy zoom_out_map
user@PE1#show chassis
network-services enhanced-ip;

content_copy zoom_out_map
user@PE1#show interfaces
ge-0/0/1 {
    description PE1-to-CE1;
    unit 0 {
        family inet {
            address 10.1.1.2/24;
        }
        family mpls {
            maximum-labels 8;
        }
    }
}
ge-0/0/3 {
    description PE1-to-R1;
    unit 0 {
        family inet {
            address 10.1.2.1/24;
        }
        family mpls {
            maximum-labels 8;
        }
    }
}
lo0 {
    unit 0 {
        family inet {
            address 192.168.100.5/32;
        }
        family mpls;
    }
}

content_copy zoom_out_map
user@PE1#show policy-options
policy-statement export_bgp {
    term a {
        from protocol [ bgp direct ];
        then accept;
    }
}

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user@PE1#show routing-instances
CE1_vpn1 {
    instance-type vrf;
    protocols {
        ospf {
            area 0.0.0.0 {
                interface ge-0/0/1.0;
            }
            export export_bgp;
        }
    }
    interface ge-0/0/1.0;
    route-distinguisher 192.168.100.5:1;
    vrf-target target:100:4;
    vrf-table-label;
}

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user@PE1#show routing-options
router-id 192.168.100.5;
autonomous-system 65410;

content_copy zoom_out_map
user@PE1#show protocols
bgp {
    group ibgp1 {
        type internal;
        local-address 192.168.100.5;
        family inet {
            unicast;
        }
        family inet-vpn {
            unicast;
        }
        neighbor 192.168.100.6;
    }
}
ldp {
    interface ge-0/0/3.0;
    interface lo0.0;
}
mpls {
    interface ge-0/0/3.0;
    interface lo0.0;
}
ospf {
    area 0.0.0.0 {
        interface ge-0/0/3.0 {
            point-to-point;
        }
        interface lo0.0 {
            passive;
        }
    }
}

配置 R1 设备

分步过程
结果

分步过程

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。

要配置设备 R1：

将网络服务模式配置为增强型 IP。增强型 IP 将路由器的网络服务设置为增强型 Internet 协议，并使用增强模式功能。
```
[edit chassis]
user@R1#set network-services enhanced-ip
```
配置 enhanced-ip 语句并提交配置后，将显示以下警告消息，提示您重新启动路由器：
```
'chassis'
WARNING: Chassis configuration for network services has been changed. A system reboot is mandatory. Please reboot the system NOW. Continuing without a reboot might result in unexpected system behavior.
commit complete
```
重新启动将显示路由器上的 FPC。

配置设备的接口。

content_copy zoom_out_map
[edit interfaces]
user@R1#set ge-0/0/1 description R1-to-R2
user@R1#set ge-0/0/1 unit 0 family inet address 10.1.3.1/24
user@R1#set ge-0/0/1 unit 0 family mpls maximum-labels 8
user@R1#set ge-0/0/2 description R1-to-R3
user@R1#set ge-0/0/2 unit 0 family inet address 10.1.4.1/24
user@R1#set ge-0/0/2 unit 0 family mpls maximum-labels 8
user@R1#set ge-0/0/3 description R1-to-PE1
user@R1#set ge-0/0/3 unit 0 family inet address 10.1.2.2/24
user@R1#set ge-0/0/3 unit 0 family mpls maximum-labels 8
user@R1#set lo0 unit 0 family inet address 192.168.100.1/32
user@R1#set lo0 unit 0 family mpls

配置路由选项以标识域中的路由器。
```
[edit routing-options]
user@R1#set router-id 192.168.100.1
```

在接口上配置 OSPF 邻接 SID 并分配 SRGB 标签以启用分段路由。整个 SRGB 中的标签可用于 OSPF。前缀 SID（和节点 SID）从 SRGB 编制索引。

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[edit protocols]
user@R1#set ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment protected index 108
user@R1#set ospf area 0.0.0.0 interface ge-0/0/1.0 ipv4-adjacency-segment unprotected index 110
user@R1#set ospf area 0.0.0.0 interface ge-0/0/1.0 post-convergence-lfa
user@R1#set ospf area 0.0.0.0 interface ge-0/0/1.0 point-to-point
user@R1#set ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment protected index 104
user@R1#set ospf area 0.0.0.0 interface ge-0/0/2.0 ipv4-adjacency-segment unprotected index 106
user@R1#set ospf area 0.0.0.0 interface ge-0/0/2.0 post-convergence-lfa
user@R1#set ospf area 0.0.0.0 interface ge-0/0/2.0 point-to-point
user@R1#set ospf area 0.0.0.0 interface ge-0/0/3.0 ipv4-adjacency-segment protected index 100
user@R1#set ospf area 0.0.0.0 interface ge-0/0/3.0 ipv4-adjacency-segment unprotected index 102
user@R1#set ospf area 0.0.0.0 interface ge-0/0/3.0 post-convergence-lfa
user@R1#set ospf area 0.0.0.0 interface ge-0/0/3.0 point-to-point
user@R1#set ospf area 0.0.0.0 interface lo0.0 passive
user@R1#set ospf source-packet-routing srgb start-label 80000
user@R1#set ospf source-packet-routing srgb index-range 50000
user@R1#set ospf source-packet-routing node-segment ipv4-index 5001

配置 TI-LFA 以启用针对链路和节点故障的保护。使用 TI-LFA 的 SR 可在主路径发生故障或不可用时，将流量立即路由到备用路径或备用路径，从而更快地恢复网络连接。
```
[edit protocols]
user@R1#set ospf backup-spf-options use-post-convergence-lfa
user@R1#set ospf backup-spf-options use-source-packet-routing
```

配置 OSPF 流量工程参数。

content_copy zoom_out_map
[edit protocols]
user@R1#set ospf traffic-engineering l3-unicast-topology
user@R1#set ospf traffic-engineering credibility-protocol-preference
user@R1#set protocols ospf traffic-engineering advertisement always

通过 SR-TE 启用 LDP 隧道。

content_copy zoom_out_map
[edit protocols]
user@R1#set ospf traffic-engineering tunnel-source-protocol spring-te

在 LDP 域中的接口上配置 MPLS 和 LDP 协议，以在 LDP 域中交换标签。

content_copy zoom_out_map
[edit protocols]
user@R1#set ldp preference 1
user@R1#set protocols ldp interface ge-0/0/1.0
user@R1#set ldp interface ge-0/0/3.0
user@R1#set ldp interface lo0.0
user@R1#set mpls interface ge-0/0/1.0
user@R1#set mpls interface ge-0/0/2.0
user@R1#set mpls interface ge-0/0/3.0
user@R1#set mpls interface lo0.0

在 LDP 域中的边缘路由器之间启用有针对性的 LDP 会话。
```
[edit protocols]
user@R1#set ldp auto-targeted-session
```

配置分段列表以将流量路由到特定路径。

content_copy zoom_out_map
[edit protocols]
user@R1#set source-packet-routing segment-list seg1 inherit-label-nexthops
user@R1#set source-packet-routing segment-list seg1 auto-translate
user@R1#set source-packet-routing segment-list seg1 hop1 ip-address 192.168.4.2
user@R1#set source-packet-routing segment-list seg1 hop2 ip-address 192.168.5.2
user@R1#set source-packet-routing segment-list seg1 hop3 ip-address 192.168.6.2

将 SR-TE LSP 配置为远程边缘路由器，以启用通过 SR-TE 的 LDP 隧道。

content_copy zoom_out_map
[edit protocols]
user@R1#set source-packet-routing source-routing-path sr_static_r5 ldp-tunneling
user@R1#set source-packet-routing source-routing-path sr_static_r5 to 192.168.66.66
user@R1#set source-packet-routing source-routing-path sr_static_r5 binding-sid 1003001
user@R1#set source-packet-routing source-routing-path sr_static_r5 primary seg1

结果

在配置模式下，输入 show chassis 、show interfaces、show 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，以便进行更正。

content_copy zoom_out_map
user@R1#show chassis
network-services enhanced-ip;

content_copy zoom_out_map
user@R1#show interfaces
ge-0/0/1 {
    description R1-to-R2;
    unit 0 {
        family inet {
            address 10.1.3.1/24;
        }
        family mpls {
            maximum-labels 8;
        }
    }
}
ge-0/0/2 {
    description R1-to-R3;
    unit 0 {
        family inet {
            address 10.1.4.1/24;
        }
        family mpls {
            maximum-labels 8;
        }
    }
}
ge-0/0/3 {
    description R1-to-PE1;
    unit 0 {
        family inet {
            address 10.1.2.2/24;
        }
        family mpls {
            maximum-labels 8;
        }
    }
}
lo0 {
    unit 0 {
        family inet {
            address 192.168.100.1/32;
        }
        family mpls;
    }
}

content_copy zoom_out_map
user@R1#show protocols
ldp {
    auto-targeted-session;
    preference 1;
    interface ge-0/0/1.0;
    interface ge-0/0/3.0;
    interface lo0.0;
}
mpls {
    interface ge-0/0/1.0;
    interface ge-0/0/2.0;
    interface ge-0/0/3.0;
    interface lo0.0;
}
ospf {
    backup-spf-options {
        use-post-convergence-lfa;
        use-source-packet-routing;
    }
    traffic-engineering {
        l3-unicast-topology;
        credibility-protocol-preference;
        advertisement always;
        tunnel-source-protocol {
            spring-te;
        }
    }
    source-packet-routing {
        node-segment ipv4-index 5001;
        srgb start-label 80000 index-range 50000;
    }
    area 0.0.0.0 {
        interface ge-0/0/1.0 {
            point-to-point;
            post-convergence-lfa;
            ipv4-adjacency-segment {
                protected index 108;
                unprotected index 110;
            }
        }
        interface ge-0/0/2.0 {
            point-to-point;
            post-convergence-lfa;
            ipv4-adjacency-segment {
                protected index 104;
                unprotected index 106;
            }
        }
        interface ge-0/0/3.0 {
            point-to-point;
            post-convergence-lfa;
            ipv4-adjacency-segment {
                protected index 100;
                unprotected index 102;
            }
        }
        interface lo0.0 {
            passive;
        }
    }
}
source-packet-routing {
    segment-list seg1 {
        inherit-label-nexthops;         
        auto-translate;                 
        hop1 ip-address 10.1.4.2;       
        hop2 ip-address 10.1.5.2;       
        hop3 ip-address 10.1.6.2;       
    }                                   
    source-routing-path sr_static_r5 {  
        ldp-tunneling;                  
        to 192.168.100.2;               
        binding-sid 1003001;            
        primary {                       
            seg1;                       
        }                               
    }                                   
}                                       

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user@R1#show routing-options
router-id 192.168.100.1;

验证

要确认配置工作正常，请执行以下任务：

验证通过 SR-TE 的 LDP 隧道
验证播发的标签
验证 LDP 转发到远程 PE 设备
验证端到端可访问性

验证通过 SR-TE 的 LDP 隧道

目的
操作
意义

目的

验证是否已启用基于 SR-TE 的 LDP 隧道，以及到远程边缘路由器的 LDP 隧道是否采用正确的路径。

操作

在操作模式下，运行 show spring-traffic-engineering lsp detail 命令。

在 R1 上

content_copy zoom_out_map
user@R1>show spring-traffic-engineering lsp detail
Name: sr_static_r5
  Tunnel-source: Static configuration
  Tunnel Forward Type: SRMPLS
  To: 192.168.100.2
  Te-group-id: 0
  State: Up
  LDP-tunneling enabled
    Path: seg1
    Path Status: NA
    Outgoing interface: NA
    Auto-translate status: Enabled Auto-translate result: Success
    Compute Status:Disabled , Compute Result:N/A , Compute-Profile Name:N/A
    BFD status: N/A BFD name: N/A
    BFD remote-discriminator: N/A
    Segment ID : 128 
    ERO Valid: true
      SR-ERO hop count: 3
        Hop 1 (Strict): 
          NAI: IPv4 Adjacency ID, 0.0.0.0 -> 10.1.4.2
          SID type: 20-bit label, Value: 80104
        Hop 2 (Strict): 
          NAI: IPv4 Adjacency ID, 0.0.0.0 -> 10.1.5.2
          SID type: 20-bit label, Value: 80204
        Hop 3 (Strict): 
          NAI: IPv4 Adjacency ID, 0.0.0.0 -> 10.1.6.2
          SID type: 20-bit label, Value: 80304

Total displayed LSPs: 1 (Up: 1, Down: 0)

在 R2 上

content_copy zoom_out_map
user@R2>show spring-traffic-engineering lsp detail
Name: sr_static_r1
  Tunnel-source: Static configuration
  Tunnel Forward Type: SRMPLS
  To: 192.168.100.1
  Te-group-id: 0
  State: Up
  LDP-tunneling enabled
    Path: seg1
    Path Status: NA
    Outgoing interface: NA
    Auto-translate status: Enabled Auto-translate result: Success
    Compute Status:Disabled , Compute Result:N/A , Compute-Profile Name:N/A
    BFD status: N/A BFD name: N/A
    BFD remote-discriminator: N/A
    Segment ID : 128 
    ERO Valid: true
      SR-ERO hop count: 3
        Hop 1 (Strict): 
          NAI: IPv4 Adjacency ID, 0.0.0.0 -> 10.1.6.1
          SID type: 20-bit label, Value: 80504
        Hop 2 (Strict): 
          NAI: IPv4 Adjacency ID, 0.0.0.0 -> 10.1.5.1
          SID type: 20-bit label, Value: 80300
        Hop 3 (Strict): 
          NAI: IPv4 Adjacency ID, 0.0.0.0 -> 10.1.4.1
          SID type: 20-bit label, Value: 80200


Total displayed LSPs: 1 (Up: 1, Down: 0)

意义

在 R1 上，使用 SR-TE 核心网络中的远程边缘路由器 192.168.100.2 建立 LDP 隧道。还可以在输出中看到 SID 标签值 80104, 80204, 80304 。
在 R2 上，使用 SR-TE 核心网络中的远程边缘路由器 192.168.100.1 建立 LDP 隧道。还可以在输出中看到 SID 标签值 80504, 80300, 80200 。

验证播发的标签

目的
操作
意义

目的

验证为转发等效类（FEC）播发的标签。

操作

在操作模式下，运行 show ldp database 命令。

在 R1 上

验证向直连 PE （PE1）播发的标签以及从远程边缘路由器（R2）收到的标签。

content_copy zoom_out_map
user@R1>show ldp database

Input label database, 192.168.100.1:0--192.168.100.2:0
Labels received: 4
  Label     Prefix
     18      192.168.100.1/32
      3      192.168.100.2/32
     20      192.168.100.5/32
     16      192.168.100.6/32


Output label database, 192.168.100.1:0--192.168.100.2:0
Labels advertised: 4
  Label     Prefix
      3      192.168.100.1/32
     4115    192.168.100.2/32
     4114    192.168.100.5/32
     4117      192.168.100.6/32

Input label database, 192.168.100.1:0--192.168.100.5:0
Labels received: 4
  Label     Prefix
     17      192.168.100.1/32
     22      192.168.100.2/32
      3      192.168.100.5/32
     24      192.168.100.6/32

Output label database, 192.168.100.1:0--192.168.100.5:0
Labels advertised: 4
  Label     Prefix
      3      192.168.100.1/32
     4115    192.168.100.2/32
     4114    192.168.100.5/32
     4117      192.168.100.6/32

在 R2 上

验证向直连 PE （PE2）播发的标签以及从远程边缘路由器（R1）接收的标签。

content_copy zoom_out_map
user@R2>show ldp database

Input label database, 192.168.100.2:0--192.168.100.1:0
Labels received: 4
  Label     Prefix
      3      192.168.100.1/32
     4115    192.168.100.2/32
     4114    192.168.100.5/32
     4117    192.168.100.6/32

Output label database, 192.168.100.2:0--192.168.100.1:0
Labels advertised: 4
  Label     Prefix
     18      192.168.100.1/32
      3      192.168.100.2/32
     20      192.168.100.5/32
     16      192.168.100.6/32

Input label database, 192.168.100.2:0--192.168.100.6:0
Labels received: 4
  Label     Prefix
     24      192.168.100.1/32
     17      192.168.100.2/32
     25      192.168.100.5/32
      3      192.168.100.6/32

Output label database, 192.168.100.2:0--192.168.100.6:0
Labels advertised: 4
  Label     Prefix
     18      192.168.100.1/32
      3      192.168.100.2/32
     20      192.168.100.5/32
     16      192.168.100.6/32

在 PE1 上

验证边缘设备 R1 是否已将远程 PE （PE2）设备的环路地址标签播发到本地 PE （PE1）设备。

content_copy zoom_out_map
user@PE1>show ldp database

Input label database, 192.168.100.5:0--192.168.100.1:0
Labels received: 4
  Label     Prefix
      3      192.168.100.1/32
     4115    192.168.100.2/32
     4114    192.168.100.5/32
     4117      192.168.100.6/32

Output label database, 192.168.100.5:0--192.168.100.1:0
Labels advertised: 4
  Label     Prefix
     17      192.168.100.1/32
     22      192.168.100.2/32
      3      192.168.100.5/32
     24      192.168.100.6/32

关于 PE2

验证边缘设备 R2 是否已将远程 PE （PE1）设备的环路地址标签播发到本地 PE （PE2）设备。

content_copy zoom_out_map
user@PE2>show ldp database

Input label database, 192.168.100.6:0--192.168.100.2:0
Labels received: 4
  Label     Prefix
     18      192.168.100.1/32
      3      192.168.100.2/32
     20      192.168.100.5/32
     16      192.168.100.6/32

Output label database, 192.168.100.6:0--192.168.100.2:0
Labels advertised: 4
  Label     Prefix
     24      192.168.100.1/32
     17      192.168.100.2/32
     25      192.168.100.5/32
      3      192.168.100.6/32

意义

在 R1 上，您可以看到标签 4117 已播发到直接连接的 PE （PE1），并且标签 27 是从远程边缘路由器（R2）接收的。
在 R2 上，您可以看到标签 18 已播发到直接连接的 PE （PE2），并且标签 25 是从远程边缘路由器（R1）接收的。
在 PE1 上，可以看到从本地边缘路由器（R1）接收了标签 4117 。
在 PE2 上，可以看到从本地边缘路由器（R2）接收了标签 18 。

验证 LDP 转发到远程 PE 设备

目的
操作
意义

目的

验证到远程 PE 路由器的路由是否使用 LDP 转发，并且是否通过 SR-TE 建立隧道。

操作

在操作模式下，运行 show route destination-prefix 命令。

在 R1 上

验证到远程 PE （PE2）路由器的路由是否通过 LDP over SR-TE 隧道。

content_copy zoom_out_map
user@R1>show route 192.168.100.6
inet.0: 29 destinations, 29 routes (29 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.6/32   *[OSPF/10/10] 1d 03:28:10, metric 2
                    >  to 10.1.3.2 via ge-0/0/1.0

inet.3: 10 destinations, 15 routes (5 active, 0 holddown, 8 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.6/32   *[LDP/1] 21:42:29, metric 1
                    >  to 10.1.4.2 via ge-0/0/2.0, Push 16, Push 80304, Push 80204(top)
                       to 10.1.3.2 via ge-0/0/1.0, Push 16, Push 80304, Push 80204, Push 85003, Push 85004(top)

在 R2 上

验证到远程 PE （PE1）路由器的路由是否通过 LDP over SR-TE 隧道。

content_copy zoom_out_map
user@R2>show route 192.168.100.5
inet.0: 29 destinations, 29 routes (29 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.5/32   *[OSPF/10/10] 22:22:45, metric 2
                    >  to 10.1.3.1 via ge-0/0/1.0

inet.3: 10 destinations, 15 routes (5 active, 0 holddown, 8 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.5/32   *[LDP/1] 22:22:45, metric 1
                    >  to 10.1.6.1 via ge-0/0/2.0, Push 4114, Push 80200, Push 80300(top)
                       to 10.1.3.1 via ge-0/0/1.0, Push 4114, Push 80200, Push 80300, Push 85004, Push 85003(top)

在 PE1 上

验证到远程 PE （PE2）路由器的路由是否通过到远程 PE 的目标 LDP 会话。

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user@PE1>show route 192.168.100.6

inet.0: 27 destinations, 27 routes (27 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.6/32   *[OSPF/10] 01:15:29, metric 3
                    >  to 10.1.2.2 via ge-0/0/3.0

inet.3: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.6/32   *[LDP/9] 01:15:29, metric 1
                    >  to 10.1.2.2 via ge-0/0/3.0, Push 4117

关于 PE2

验证到远程 PE （PE1）路由器的路由是否通过到远程 PE 的目标 LDP 会话。

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user@PE2>show route 192.168.100.5

inet.0: 27 destinations, 27 routes (27 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.5/32   *[OSPF/10] 01:27:40, metric 3
                    >  to 10.1.7.1 via ge-0/0/3.0

inet.3: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.100.5/32   *[LDP/9] 01:27:40, metric 1
                    >  to 10.1.7.1 via ge-0/0/3.0, Push 20

意义

在 R1 上，您可以看到 LDP 标签 16 为，SR-TE 标签堆栈为 80304, 80204, 85003, 85004。
在 R2 上，您可以看到 LDP 标签 22 为，SR-TE 标签堆栈为 80200, 80300, 85004, 85003。
在 PE1 和 PE2 上，您可以分别看到 LDP 标签 4117 为和 20。

验证端到端可访问性

目的
操作
意义

目的

验证 CE1 是否可以使用 ping 192.168.100.22 源 192.168.100.11 计数 2 操作模式命令对 CE2 执行 ping 操作。

操作

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user@CE1> ping 192.168.100.22 source 192.168.100.11 count 2 
PING 192.168.100.22 (192.168.100.22): 56 data bytes
64 bytes from 192.168.100.22: icmp_seq=0 ttl=58 time=8.772 ms
64 bytes from 192.168.100.22: icmp_seq=1 ttl=58 time=9.189 ms

--- 192.168.100.22 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 8.772/8.980/9.189/0.209 ms

意义

CE1 的输出显示 CE1 可以对 CE2 执行 ping 操作。

arrow_backward PREVIOUS 示例：在 IS-IS 网络中通过 SR-TE 建立隧道 LDP

NEXT arrow_forward LDP 信号 LSP 的 MPLS TTL 传播灵活性

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示例：在 OSPF 网络中通过 SR-TE 建立隧道 LDP

概述

拓扑学

要求

配置

CLI 快速配置

配置 PE1

分步过程

结果

配置 R1 设备

分步过程

结果

验证

验证通过 SR-TE 的 LDP 隧道

目的

操作

意义

验证播发的标签

目的

操作

意义

验证 LDP 转发到远程 PE 设备

目的

操作

意义

验证端到端可访问性

目的

操作

意义

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MPLS 应用程序用户指南

在本页

机器翻译对您有帮助吗?

免责声明:

示例：在 OSPF 网络中通过 SR-TE 建立隧道 LDP

概述

拓扑学

要求

配置

CLI 快速配置

配置 PE1

分步过程

结果

配置 R1 设备

分步过程

结果

验证

验证通过 SR-TE 的 LDP 隧道

目的

操作

意义

验证播发的标签

目的

操作

意义

验证 LDP 转发到远程 PE 设备

目的

操作

意义

验证端到端可访问性

目的

操作

意义

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