250
[SwitchC] bgp 100
[SwitchC-bgp] peer 3.0.1.1 as-number 200
[SwitchC-bgp] peer 2.0.1.1 as-number 200
# Configure BFD over the link to peer 3.0.1.1 so that when the link Switch A<—>Switch
B<—>Switch C fails, BFD can quickly detect the failure and notify it to BGP, and then the link
Switch A<—>Switch D<—>Switch C takes effect immediately.
[SwitchC-bgp] peer 3.0.1.1 bfd
# Configure a preference of 140 for the IBGP routes on Switch C.
[SwitchC-bgp] preference 255 140 130
[SwitchC-bgp] quit
5. Configure BGP on Switch E:
# Establish an EBGP connection between Switch A and Switch E.
<SwitchE> system-view
[SwitchE] bgp 100
[SwitchE-bgp] peer 30.1.1.1 as-number 200
# Configure Switch E to advertise route 1.1.1.0/24 through BGP.
[SwitchE-bgp] network 1.1.1.0 24
[SwitchE-bgp] quit
6. Configure BFD parameters (you can use default BFD parameters instead):
# Configure Switch A.
[SwitchA] bfd session init-mode active
[SwitchA] interface vlan-interface 100
{ Configure the minimum interval for transmitting BFD control packets as 500 milliseconds.
[SwitchA-Vlan-interface100] bfd min-transmit-interval 500
{ Configure the minimum interval for receiving BFD control packets as 500 milliseconds.
[SwitchA-Vlan-interface100] bfd min-receive-interval 500
{ Configure the detect multiplier as 7.
[SwitchA-Vlan-interface100] bfd detect-multiplier 7
{ Configure the BFD authentication mode as plain-text authentication, and set the authentication
key to ibgpbfd.
[SwitchA-Vlan-interface100] bfd authentication-mode simple 1 ibgpbfd
[SwitchA-Vlan-interface100] quit
# Configure Switch C.
[SwitchC] bfd session init-mode active
[SwitchC] interface vlan-interface 101
[SwitchC-Vlan-interface101] bfd min-transmit-interval 500
[SwitchC-Vlan-interface101] bfd min-receive-interval 500
[SwitchC-Vlan-interface101] bfd detect-multiplier 7
[SwitchC-Vlan-interface101] bfd authentication-mode simple 1 ibgpbfd
[SwitchC-Vlan-interface101] return
7. Verify the configuration:
# Display the BFD session information on Switch C.
<SwitchC> display bfd session verbose
Total Session Num: 1 Init Mode: Active
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