BGP与BFD联动.docx

配置BGP与BFD联动
1. 组网需求
l 在AS 100内使用OSPF作为IGP协议；
l Router A与Router B建立IBGP连接并使能BFD；
l Router A和Router C之间的链路发生故障后，BFD能够快速检测并通告BGP协议。
2. 组网图
图1-27 BGP与BFD联动配置组网图

3. 配置步骤
(1) 配置各接口的IP地址（略）
(2) 配置OSPF（略）
(3) 配置BGP连接
# 配置Router A。
[RouterA] bgp 100
[RouterA-bgp] peer 192.168.0.100 as-number 100
[RouterA-bgp] peer 192.168.0.100 bfd
# 配置Router B。
<RouterB> system-view
[RouterB] bgp 100
[RouterB-bgp] peer 192.168.0.102 as-number 100
[RouterB-bgp] peer 192.168.0.102 bfd
(4) 配置各路由器接口及BFD参数
# 配置Router A。
<RouterA> system-view
[RouterA] bfd session init-mode active
[RouterA] interface ethernet 1/1
[RouterA-Ethernet1/1] ip address 192.168.0.102 24
[RouterA-Ethernet1/1] bfd min-transmit-interval 500
[RouterA-Ethernet1/1] bfd min-receive-interval 500
[RouterA-Ethernet1/1] bfd detect-multiplier 7
[RouterA-Ethernet1/1] bfd authentication-mode simple 1 zhang
[RouterA-Ethernet1/1] quit
# 配置Router B。
<RouterB> system-view
[RouterB] bfd session init-mode active
[RouterB] interface ethernet 1/1
[RouterB-Ethernet1/1] ip address 192.168.0.100 24
[RouterB-Ethernet1/1] bfd min-transmit-interval 500
[RouterB-Ethernet1/1] bfd min-receive-interval 500
[RouterB-Ethernet1/1] bfd detect-multiplier 6
[RouterB-Ethernet1/1] bfd authentication-mode simple 1 zhang
[RouterB-Ethernet1/1] quit
(5) 检查配置结果
# 显示Router A的BFD邻居详细信息。
[RouterA] display bfd interface verbose
Total Interface Num: 1
Interface: Ethernet1/1 Session Num: 1
Min Trans Inter: 300ms Min Recv Inter: 300ms
DetectMult: 6 Min Echo Recv Inter: 300ms
Auth mode: Simple
LD/RD SourceAddr DestAddr ConnType State Mode
7/7 192.168.0.100 192.168.0.102 Direct Up Ctrl
# Router A和Router B之间的链路发生故障后，使用display bfd interface verbose命令查看Ethernet1/1接口下会话信息被删除。
[RouterA] display bfd interface verbose
Total Interface Num: 1
Interface: Ethernet1/1 Session Num: 0
Min Trans Inter: 400ms Min Recv Inter: 400ms
DetectMult: 8 Min Echo Recv Inter: 400ms
Auth mode: Simple