华为设备配置BFD多跳检测

1. 配置设备间的网络互连
   [LSW1]vlan batch 10
   [LSW1-GigabitEthernet0/0/2]port link-type hybrid
   [LSW1-GigabitEthernet0/0/2]port hybrid pvid vlan 10
   [LSW1-GigabitEthernet0/0/2]port hybrid untagged vlan 10
   [LSW1]int Vlanif 10
   [LSW1-Vlanif10]ip add 10.1.1.1 24
   [LSW2]vlan batch 10 20
   [LSW2-GigabitEthernet0/0/1]port link-type hybrid
   [LSW2-GigabitEthernet0/0/1]port hybrid pvid vlan 10
   [LSW2-GigabitEthernet0/0/1]port hybrid untagged vlan 10
   [LSW2-GigabitEthernet0/0/3]port link-type hybrid
   [LSW2-GigabitEthernet0/0/3]port hybrid untagged vlan 20
   [LSW2-GigabitEthernet0/0/3]port hybrid pvid vlan 20
   [LSW2]int Vlanif 10
   [LSW2-Vlanif10]ip add 10.1.1.2 24
   [LSW2-Vlanif10]int Vlanif 20
   [LSW2-Vlanif20]ip add 10.1.2.2 24
   [LSW3]vlan batch 20
   [LSW3-GigabitEthernet0/0/2]port link-type hybrid
   [LSW3-GigabitEthernet0/0/2]port hybrid pvid vlan 20
   [LSW3-GigabitEthernet0/0/2]port hybrid untagged vlan 20
   [LSW3]int Vlanif 20
   [LSW3-Vlanif20]ip add 10.1.2.3 24

2. 配置静态路由，使LSW1、LSW3之间有可达路由
   [LSW1]ip route-static 10.1.2.0 24 10.1.1.2
   [LSW3]ip route-static 10.1.1.0 24 10.1.2.2

3. 配置多跳BFD检测
   [LSW1]bfd
   [LSW1]bfd 1to3 bind peer-ip 10.1.2.3
   [LSW1-bfd-session-1to3]discriminator local 10
   [LSW1-bfd-session-1to3]discriminator remote 20
   [LSW1-bfd-session-1to3]commit
   [LSW3]bfd
   [LSW3]bfd 3to1 bind peer-ip 10.1.1.1
   [LSW3-bfd-session-3to1]discriminator local 20
   [LSW3-bfd-session-3to1]discriminator remote 10
   [LSW3-bfd-session-3to1]commit

4. 验证配置
   

   对LSW1的GE0/0/2接口执行shutdown操作，模拟链路故障
   [LSW1-GigabitEthernet0/0/2]shutdown