华为配置IPv4静态路由与静态BFD联动示例

组网需求

如图1所示,SwitchA通过SwitchB和NMS跨网段相连。在SwitchA上通过静态路由与NMS进行正常通信。在SwitchA和SwitchB之间实现毫秒级故障感知,提高收敛速度

华为配置IPv4静态路由与静态BFD联动示例_第1张图片

配置思路

采用如下思路配置IPv4静态路由与静态BFD联动:

  1. 在SwitchA和SwitchB上配置BFD Session,在SwitchA和SwitchB之间实现毫秒级故障感知,提高收敛速度。

  2. 配置SwitchA到NMS的静态路由并绑定BFD Session,实现毫秒级故障感知,提高收敛速度。

操作步骤
配置各接口所属的VLAN

# 配置SwitchA。SwitchB的配置与SwitchA类似

[zhongwanzhiA]vlan 10
[zhongwanzhiA]interface GigabitEthernet 0/0/1	
[zhongwanzhiA-GigabitEthernet0/0/1]port link-type trunk 
[zhongwanzhiA-GigabitEthernet0/0/1]port trunk allow-pass vlan 10
[zhongwanzhiA-GigabitEthernet0/0/1]quit

配置各VLANIF接口的IP地址

# 配置SwitchA。SwitchB的配置与SwitchA类似

[zhongwanzhiA]interface Vlanif 10
[zhongwanzhiA-Vlanif10]ip add	
[zhongwanzhiA-Vlanif10]ip address 10.1.1.1 24
[zhongwanzhiA-Vlanif10]quit

配置SwitchA和SwitchB间的BFD会话

# 在SwitchA配置与SwitchB间的BFD Session。

[zhongwanzhiA]bfd 
[zhongwanzhiA-bfd]quit
[zhongwanzhiA]bfd aa bind peer-ip 10.1.1.2
[zhongwanzhiA-bfd-session-aa]discriminator local 10
[zhongwanzhiA-bfd-session-aa]discriminator remote 20
[zhongwanzhiA-bfd-session-aa]commit
[zhongwanzhiA-bfd-session-aa]quit

# 在SwitchB配置与SwitchA之间的BFD Session。

[zhongwanzhiB]bfd 
[zhongwanzhiB-bfd]quit
[zhongwanzhiB]bfd bb bind peer-ip 10.1.1.1
[zhongwanzhiB-bfd-session-bb]discriminator local 20
[zhongwanzhiB-bfd-session-bb]discriminator remote 10
[zhongwanzhiB-bfd-session-bb]commit
[zhongwanzhiB-bfd-session-bb]quit

配置静态路由并绑定BFD会话

# 在SwitchA配置到外部网络的静态路由,并绑定BFD会话aa

[zhongwanzhiA]ip route-static 10.2.2.0 24 10.1.1.2 track bfd-session aa

 验证配置结果

# 配置完成后,在SwitchA和SwitchB上执行display bfd session all命令,可以看到BFD会话已经建立,且状态为Up。SwitchA上的显示为例。

[zhongwanzhiA]display bfd session all 
--------------------------------------------------------------------------------
Local Remote     PeerIpAddr      State     Type        InterfaceName            
--------------------------------------------------------------------------------

10    20         10.1.1.2        Up        S_IP_PEER         -                  
--------------------------------------------------------------------------------
     Total UP/DOWN Session Number : 1/0

 # 在SwitchA查看IP路由表,静态路由存在于路由表中

[zhongwanzhiA]display ip routing-table 
Route Flags: R - relay, D - download to fib
------------------------------------------------------------------------------
Routing Tables: Public
         Destinations : 5        Routes : 5        

Destination/Mask    Proto   Pre  Cost      Flags NextHop         Interface

       10.1.1.0/24  Direct  0    0           D   10.1.1.1        Vlanif10
       10.1.1.1/32  Direct  0    0           D   127.0.0.1       Vlanif10
       10.2.2.0/24  Static  60   0          RD   10.1.1.2        Vlanif10
      127.0.0.0/8   Direct  0    0           D   127.0.0.1       InLoopBack0
      127.0.0.1/32  Direct  0    0           D   127.0.0.1       InLoopBack0

[zhongwanzhiA]

为什么要做BDF会话服 :因为当BFD检测到链路恢复正常后,就会迅速通知所绑定的静态路由重新生效

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