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Figure 3 Network diagram
Device Interface IP address Device Interface IP address
Router A Eth1/1 12.1.1.1/24
Router B
Eth1/1
12.1.1.2/24
Eth1/2 10.1.1.102/24
Eth1/2
13.1.1.1/24
Router C Eth1/1 10.1.1.100/24
Eth1/2 13.1.1.2/24
Configuration procedure
1. Configure IP addresses for interfaces. (Details not shown.)
2. Configure static routes and BFD:
# Configure static routes on Route A and enable BFD control mode for the static route that traverses
the Layer 2 switch.
<RouterA> system-view
[RouterA] interface ethernet 1/1
[RouterA-Ethernet1/1] bfd min-transmit-interval 500
[RouterA-Ethernet1/1] bfd min-receive-interval 500
[RouterA-Ethernet1/1] bfd detect-multiplier 9
[RouterA-Ethernet1/1] quit
[RouterA] ip route-static 120.1.1.0 24 ethernet 1/1 12.1.1.2 bfd control-packet
[RouterA] ip route-static 120.1.1.0 24 ethernet 1/2 10.1.1.100 preference 65
[RouterA] quit
# Configure static routes on Router B and enable BFD control mode for the static route that
traverses the Layer 2 switch.
<RouterB> system-view
[RouterB] interface ethernet 1/1
[RouterB-Ethernet1/1] bfd min-transmit-interval 500
[RouterB-Ethernet1/1] bfd min-receive-interval 500
[RouterB-Ethernet1/1] bfd detect-multiplier 9
[RouterB-Ethernet1/1] quit
[RouterB] ip route-static 121.1.1.0 24 ethernet 1/1 12.1.1.1 bfd control-packet
[RouterB] ip route-static 121.1.1.0 24 ethernet 1/2 13.1.1.2 preference 65
[RouterB] quit
# Configure static routes on Router C.
<RouterC> system-view
[RouterC] ip route-static 120.1.1.0 24 13.1.1.1
[RouterC] ip route-static 121.1.1.0 24 10.1.1.102
Router A Router B
Eth1/1 Eth1/1
Router C
BFD
Eth1/1
Eth1/2
Eth1/2
L2 Switch
Eth1/2
121.1.1.0/24 120.1.1.0/24