18.8 BFD基础

7.配置IPv4静态路由与BFD联动

1）R1配置

[R1]bfd
[R1]bfd R1toR2 bind peer-ip 12.1.1.2 interface GigabitEthernet 0/0/0 one-arm-echo 
//在R1上配置与R2之间的BFD会话
[R1-bfd-session-r1tor2]discriminator local 1
[R1-bfd-session-r1tor2]min-echo-rx-interval 100
[R1-bfd-session-r1tor2]commit
[R1]ip route-static 3.3.3.3 32 GigabitEthernet 0/0/0 12.1.1.2 track bfd-session R1toR2
//配置Router_1到3.3.3.3/32网段的静态路由，R1到R2的流量优先走R1 –> SW1–> 2链路，当此链路发生故障时，流量切换到R1 –> R3–> R2链路上
[R1]ip route-static 3.3.3.3 32 GigabitEthernet 0/0/1 13.1.1.3 preference 65

2）R2配置

[R2]ip route-static 1.1.1.1 32 GigabitEthernet 0/0/0 12.1.1.1 
//配置R2到1.1.1.1/32网段的静态路由，R2到R1的流量优先走R2 –>SW1–> R1链路，当此链路发生故障时，流量切换到R2 –> R3–> R1链路上。
[R2]ip route-static 1.1.1.1 32 GigabitEthernet 0/0/1 23.1.1.3 preference 65

3）R3配置

[R3]ip route-static 2.2.2.2 32 GigabitEthernet 0/0/1 23.1.1.2
[R3]ip route-static 1.1.1.1 32 GigabitEthernet 0/0/2 13.1.1.1

4）验证配置

<R1>display bfd session all
1     -          12.1.1.2        Up        S_IP_IF     GigabitEthernet0/0/0    

1 2 3 4 5 6 7 8