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• Enable BFD for RIP on VLAN-interface 100 of Switch A, and specify VLAN-interface 100 of
Switch B as the destination. When a unidirectional link occurs between Switch A and Switch B,
BFD can quickly detect the link failure and notify RIP. Switch B then deletes the neighbor
relationship and the route information learned on VLAN-interface 100. It does not receive or
send any packets from VLAN-interface 100. When the route learned from Switch A ages out,
Switch B uses the route destined for 100.1.1.1 24 through VLAN-interface 200.
Figure 12 Network diagram
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure basic RIP and enable BFD on the interfaces:
# Configure Switch A.
<SwitchA> system-view
[SwitchA] rip 1
[SwitchA-rip-1] network 192.168.2.0
[SwitchA-rip-1] import-route static
[SwitchA-rip-1] quit
[SwitchA] interface vlan-interface 100
[SwitchA-Vlan-interface100] rip bfd enable destination 192.168.2.2
[SwitchA-Vlan-interface100] quit
# Configure Switch B.
<SwitchB> system-view
[SwitchB] rip 1
[SwitchB-rip-1] network 192.168.2.0
[SwitchB-rip-1] network 192.168.3.0
[SwitchB-rip-1] quit
# Configure Switch C.
<SwitchC> system-view
[SwitchC] rip 1
[SwitchC-rip-1] network 192.168.3.0
[SwitchC-rip-1] import-route static cost 3
[SwitchC-rip-1] quit
3. Configure BFD parameters on VLAN-interface 100 of Switch A.
[SwitchA] bfd echo-source-ip 11.11.11.11
[SwitchA] interface vlan-interface 100
[SwitchA-Vlan-interface100] bfd min-echo-receive-interval 500
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