18.8 BFD基础

4.BFD与OSPF联动

1）R1配置的OSPF，并使能OSPF的BFD功能

[R1]bfd
[R1]ospf 1 router-id 1.1.1.1
[R1-ospf-1]bfd all-interfaces enable 
[R1-ospf-1]area 0
[R1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0
[R1-ospf-1-area-0.0.0.0]network 12.1.1.0 0.255.255.255
[R1-ospf-1-area-0.0.0.0]network 13.1.1.0 0.255.255.255
[R1]interface GigabitEthernet 0/0/2
[R1-GigabitEthernet0/0/2]ospf bfd enable 
[R1-GigabitEthernet0/0/2]ospf bfd min-tx-interval 100 min-rx-interval 100

2）R2配置的OSPF，并使能OSPF的BFD功能

[R2]bfd
[R2]ospf 1 router-id 2.2.2.2
[R2-ospf-1]bfd all-interfaces  enable 
[R2-ospf-1]area 0
[R2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
[R2-ospf-1-area-0.0.0.0]network 12.1.1.0 0.255.255.255
[R2-ospf-1-area-0.0.0.0]network 23.1.1.0 0.255.255.255

3）R3配置的OSPF，并使能OSPF的BFD功能

[R3]bfd
[R3]ospf 1 router-id 3.3.3.3
[R3-ospf-1]bfd all-interfaces enable 
[R3-ospf-1]area 0
[R3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
[R3-ospf-1-area-0.0.0.0]network 13.1.1.0 0.255.255.255
[R3-ospf-1-area-0.0.0.0]network 23.1.1.0 0.255.255.255
[R3]interface GigabitEthernet 0/0/2
[R3-GigabitEthernet0/0/2]ospf bfd enable 
[R3-GigabitEthernet0/0/2]ospf bfd min-tx-interval 100 min-rx-interval 100

4）验证配置结果，BFD会话已被创建，且状态为UP。

<R1>display ospf bfd session all

         OSPF Process 1 with Router ID 1.1.1.1
  Area 0.0.0.0 interface 12.1.1.1(GigabitEthernet0/0/0)'s BFD Sessions

 NeighborId:2.2.2.2          AreaId:0.0.0.0          Interface:GigabitEthernet0/0/0
 BFDState:up                 rx    :1000             tx       :1000          
 Multiplier:3                BFD Local Dis:8192      LocalIpAdd:12.1.1.1
 RemoteIpAdd:12.1.1.2        Diagnostic Info:No diagnostic information

  Area 0.0.0.0 interface 13.1.1.1(GigabitEthernet0/0/2)'s BFD Sessions

 NeighborId:3.3.3.3          AreaId:0.0.0.0          Interface:GigabitEthernet0/0/2
 BFDState:up                 rx    :100              tx       :100           
 Multiplier:3                BFD Local Dis:8194      LocalIpAdd:13.1.1.1
 RemoteIpAdd:13.1.1.3        Diagnostic Info:No BFD packets were received

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