H3C Technologies H3C S12500 Series Switches - Manual (Page 29)

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A and Switch B through the Layer 2 switch fails, BFD can detect the failure immediately and Switch A and
Switch B can communicate through Switch C.
Figure 3 Network diagram
Device Interface IP address Device Interface IP address
Switch A Vlan-int10 12.1.1.1/24 Switch B Vlan-int10 12.1.1.2/24
Vlan-int11 10.1.1.102/24 Vlan-int13 13.1.1.1/24
Switch C Vlan-int11 10.1.1.100/24
Vlan-int13 13.1.1.2/24
Configuration procedure
1. Configure IP addresses for the interfaces. (Details not shown.)
2. Configure static routes and BFD:
# Configure static routes on Switch A and enable BFD control mode for the static route that
traverses the Layer 2 switch.
<SwitchA> system-view
[SwitchA] interface vlan-interface10
[SwitchA-vlan-interface10] bfd min-transmit-interval 500
[SwitchA-vlan-interface10] bfd min-receive-interval 500
[SwitchA-vlan-interface10] bfd detect-multiplier 9
[SwitchA-vlan-interface10] quit
[SwitchA] ip route-static 120.1.1.0 24 vlan-interface 10 12.1.1.2 bfd control-packet
[SwitchA] ip route-static 120.1.1.0 24 vlan-interface 11 10.1.1.100 preference 65
[SwitchA] quit
# Configure static routes on Switch B and enable BFD control mode for the static route that
traverses the Layer 2 switch.
<SwitchB> system-view
[SwitchB] interface vlan-interface10
[SwitchB-vlan-interface10] bfd min-transmit-interval 500
[SwitchB-vlan-interface10] bfd min-receive-interval 500
[SwitchB-vlan-interface10] bfd detect-multiplier 9
[SwitchB-vlan-interface10]] quit
[SwitchB] ip route-static 121.1.1.0 24 vlan-interface 10 12.1.1.1 bfd control-packet
[SwitchB] ip route-static 121.1.1.0 24 vlan-interface 13 13.1.1.2 preference 65
[SwitchB] quit
3. Verify the configuration:
# Display BFD sessions on Switch A.
<SwitchA> display bfd session