Juniper MPLS Static LSP

MPLS Static LSP

1、配置接口去接收和处理MPLS帧

user@R1#set interface ge-1/0/0 unit 0 family inet family mpls

 

2、指定哪个接口运行MPLS

user@R1#set protocols mpls interface ge-1/0/0.0

或

user@R1#setprotocols mpls interface all

 

3、验证MPLS接口配置

user@R1>show mpls interface

Interface         state         (x: extended)

ge-1/0/5.0        up            

ge-1/0/6.0        up            

 

4、配置static LSPs

命名：每条Static LSP应该被给出一个唯一的名称，并且名称在路径上所有路由应该保存一致。

标签值：static LSPs预留的标签范围在1000000和1048575之间.剩下的标签空间用于动态标签分发协议。

如果设计需要，标签0(显式null)也允许在倒数第二跳。如果使用TC  bits来传递Class ofService信息，这是很有用的。

 

a、在ingress路由配置static LSP

user@R1#set protocols mpls static-label-switch-path ingress next-hop

to push

 

b、在transit路由器配置static LSP,指定传入标签和转发动作，可以swap带着label 0（explicit null）或倒数第二跳弹出（pop）。

 

user@R2#set protocols mpls static-label-switch-path transit next-hop

swap

在Transitrouter操作模式下查看命令：

查看LSP状态:show mpls static-lsp name transit extensive

查看标签交换表：show route table mpls.0

 

c、，如果做倒数第二跳弹出，那么在egress router就不需要配置。

 

5、路由表汇总

在juniper路由器上配置staticLSP直接影响到两张表，

mpls.0表（labelswitchingtable）:传入标签和转发动作之间的映射

inet.3表：用于跟踪LSP 入站点

注意inet.0 和inet.6表分别用于IPv4和IPv6转发不受Static LSP配置的影响，这意味这Juniper路由器默认不会使用MPLS转发IPv4和IPv6流量。

 

6、staticLSP作为静态路由的下一跳

user@R1#set routing-options static route static-lsp-next-hop

 

静态标签j交换路径用于转发的一种非常简单的方法是创建静态LSP作为静态路由的吓一跳。然后，静态路由将被安装到inet.0表，并将用于转发流量。还有其他的方法(稍后讨论)将前缀与标签交换路径关联起来用于转发。然而，LSP下跳的静态路由有几个优点，包括容易设置特定于路由的属性的可能性，以及静态路由易于操作和重新分配策略的事实。

 

备注：对于point-to-point接口(e.g.,SONET/SDH)你可以使用接口名称作为下一跳而不是ip address。

 

MPLS Packet Forwarding实验：

R1

set logical-systems r1 interfaces ge-0/0/0 unit 12 vlan-id 12

set logical-systems r1 interfaces ge-0/0/0 unit 12 family inet address 10.1.12.1/30

set logical-systems r1 interfaces ge-0/0/0 unit 12 family mpls

set logical-systems r1 interfaces lo0 unit 1 family inet address 1.1.1.1/32

set logical-systems r1 protocols mpls static-label-switched-path r1-to-r4 ingress next-hop10.1.12.2

set logical-systems r1 protocols mpls static-label-switched-path r1-to-r4 ingress to 4.4.4.4

set logical-systems r1 protocols mpls static-label-switched-path r1-to-r4 ingress push 1000014

set logical-systems r1 protocols mpls interface ge-0/0/0.12

set logical-systems r1 routing-options static route 4.4.4.4/32 static-lsp-next-hop r1-to-r4

 

R2

set logical-systems r2 interfaces ge-0/0/1 unit 12 vlan-id 12

set logical-systems r2 interfaces ge-0/0/1 unit 12 family inet address 10.1.12.2/30

set logical-systems r2 interfaces ge-0/0/1 unit 12 family mpls

set logical-systems r2 interfaces ge-0/0/1 unit 23 vlan-id 23

set logical-systems r2 interfaces ge-0/0/1 unit 23 family inet address 10.1.23.1/30

set logical-systems r2 interfaces ge-0/0/1 unit 23 family mpls

set logical-systems r2 protocols mpls static-label-switched-path r1-to-r4 transit 1000014 next-hop10.1.23.2

set logical-systems r2 protocols mpls static-label-switched-path r1-to-r4 transit 1000014 swap1000024

set logical-systems r2 protocols mpls static-label-switched-path r4-to-r1 transit 1000031 next-hop10.1.12.1

set logical-systems r2 protocols mpls static-label-switched-path r4-to-r1 transit 1000031 pop

set logical-systems r2 protocols mpls interface ge-0/0/1.12

set logical-systems r2 protocols mpls interface ge-0/0/1.23

 

R3

set logical-systems r3 interfaces ge-0/0/2 unit 23 vlan-id 23

set logical-systems r3 interfaces ge-0/0/2 unit 23 family inet address 10.1.23.2/30

set logical-systems r3 interfaces ge-0/0/2 unit 23 family mpls

set logical-systems r3 interfaces ge-0/0/2 unit 34 vlan-id 34

set logical-systems r3 interfaces ge-0/0/2 unit 34 family inet address 10.1.34.1/30

set logical-systems r3 interfaces ge-0/0/2 unit 34 family mpls

set logical-systems r3 protocols mpls static-label-switched-path r1-to-r4 transit 1000024 next-hop10.1.34.2

set logical-systems r3 protocols mpls static-label-switched-path r1-to-r4 transit 1000024 pop

set logical-systems r3 protocols mpls static-label-switched-path r4-to-r1 transit 1000041 next-hop10.1.23.1

set logical-systems r3 protocols mpls static-label-switched-path r4-to-r1 transit 1000041 swap1000031

set logical-systems r3 protocols mpls interface ge-0/0/2.23

set logical-systems r3 protocols mpls interface ge-0/0/2.34

 

R4

set logical-systems r4 interfaces ge-0/0/3 unit 34 vlan-id 34

set logical-systems r4 interfaces ge-0/0/3 unit 34 family inet address 10.1.34.2/30

set logical-systems r4 interfaces ge-0/0/3 unit 34 family mpls

set logical-systems r4 interfaces lo0 unit 4 family inet address 4.4.4.4/32

set logical-systems r4 protocols mpls static-label-switched-path r4-to-r1 ingress next-hop10.1.34.1

set logical-systems r4 protocols mpls static-label-switched-path r4-to-r1 ingress to 1.1.1.1

set logical-systems r4 protocols mpls static-label-switched-path r4-to-r1 ingress push 1000041

set logical-systems r4 protocols mpls interface ge-0/0/3.34

set logical-systems r4 routing-options static route 1.1.1.1/32 static-lsp-next-hop r4-to-r1

 

测试结果

R1：

root@vMX-1:r1>show mpls static-lsp ingress extensive

Ingress LSPs:

LSPname: r1-to-r4,To: 4.4.4.4

  State: Up

  Nexthop: 10.1.12.2 Via ge-0/0/0.12

  LabelOperation: Push, Outgoing-label: 1000014

  Created: Sat Aug  5 09:25:14 2017

  Bandwidth: 0 bps

  Statistics: Packets 2442, Bytes 204776

Total 1, displayed1, Up 1, Down 0

 

root@vMX-1:r1>show route table inet.0 protocol static

 

inet.0: 14destinations, 14 routes (14 active, 0 holddown, 0 hidden)

+ = Active Route, -= Last Active, * = Both

 

4.4.4.4/32         *[Static/5] 02:18:53

                    > to 10.1.12.2 viage-0/0/0.12, Push 1000014

 

root@vMX-1:r1>ping 4.4.4.4 source 1.1.1.1   

PING 4.4.4.4(4.4.4.4): 56 data bytes

64 bytes from4.4.4.4: icmp_seq=0 ttl=62 time=9.630 ms

64 bytes from4.4.4.4: icmp_seq=1 ttl=62 time=5.994 ms

64 bytes from4.4.4.4: icmp_seq=2 ttl=62 time=14.861 ms

64 bytes from4.4.4.4: icmp_seq=3 ttl=62 time=3.858 ms

64 bytes from4.4.4.4: icmp_seq=4 ttl=62 time=2.675 ms

^C

--- 4.4.4.4 pingstatistics ---

5 packetstransmitted, 5 packets received, 0% packet loss

round-tripmin/avg/max/stddev = 2.675/7.404/14.861/4.416 ms