Users Guide
Disabling and Re-Enabling BFD
BFD is enabled on all interfaces by default, though sessions are not created unless explicitly congured.
If you disable BFD, all of the sessions on that interface are placed in an Administratively Down state ( the rst message example), and the
remote systems are notied of the session state change (the second message example).
To disable and re-enable BFD on an interface, use the following commands.
• Disable BFD on an interface.
INTERFACE mode
no bfd enable
• Enable BFD on an interface.
INTERFACE mode
bfd enable
If you disable BFD on a local interface, this message displays:
If the remote system state changes due to the local state administration being down, this message displays:
Congure BFD for Static Routes
BFD oers systems a link state detection mechanism for static routes. With BFD, systems are notied to remove static routes from the
routing table as soon as the link state change occurs, rather than waiting until packets fail to reach their next hop.
Conguring BFD for static routes is a three-step process:
1 Enable BFD globally.
2 Congure static routes on both routers on the system (either local or remote).
3 Congure an IP route to connect BFD on the static routes using the ip route bfd command.
Related Conguration Tasks
• Changing Static Route Session Parameters
• Disabling BFD for Static Routes
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Bidirectional Forwarding Detection (BFD)