18.8 BFD基础

5.BFD与ISIS联动

1）R1配置的ISIS，并使能ISIS的BFD功能

[R1]bfd
[R1]isis 1
[R1-isis-1]is-level level-2
[R1-isis-1]bfd all-interfaces enable   
[R1-isis-1]network-entity 49.0123.0000.0001.00

[R1]interface GigabitEthernet 0/0/2
[R1-GigabitEthernet0/0/2]isis enable 1
[R1-GigabitEthernet0/0/2]isis cost 5
[R1-GigabitEthernet0/0/2]isis bfd enable 
[R1-GigabitEthernet0/0/2]isis bfd min-tx-interval 100 min-rx-interval 100 
//配置发送和接收单跳BFD控制报文的最小时间间隔都为100ms
[R1]interface GigabitEthernet 0/0/0
[R1-GigabitEthernet0/0/0]isis enable 1

2）R2配置的ISIS，并使能ISIS的BFD功能

[R2]bfd
[R2]isis 1
[R2-isis-1]is-level level-2
[R2-isis-1]bfd all-interfaces enable 
[R2-isis-1]network-entity 49.0123.0000.0002.00
[R2]interface GigabitEthernet 0/0/0
[R2-GigabitEthernet0/0/0]isis enable 1
[R2]interface GigabitEthernet 0/0/1
[R2-GigabitEthernet0/0/1]isis enable 1 

3）R3配置的ISIS，并使能ISIS的BFD功能

[R3]bfd
[R3]isis 1
[R3-isis-1]is-level level-2
[R3-isis-1]bfd all-interfaces enable
[R3-isis-1]network-entity 49.0123.0000.0003.00
[R3]interface GigabitEthernet 0/0/2
[R3-GigabitEthernet0/0/2]isis enable 1
[R3-GigabitEthernet0/0/2]isis cost 5
[R3-GigabitEthernet0/0/2]isis bfd enable
[R3-GigabitEthernet0/0/2]isis bfd min-tx-interval 100 min-rx-interval 100
[R3]interface GigabitEthernet 0/0/1
[R3-GigabitEthernet0/0/1]isis enable 1

4）验证配置结果，当“State”的状态显示为“Up”时表示R1和R3已建立IS-IS邻居关系。

<R1>display isis peer verbose
 System Id     Interface          Circuit Id       State HoldTime Type     PRI

0123.0000.0003  GE0/0/2            0123.0000.0001.01 Up   30s      L2       64 

1 2 3 4 5 6 7 8