Users Guide

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:
R1(conf-if-te-4/24)#01:00:52: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE: Changed session
state to Ad
Dn for neighbor 2.2.2.2 on interface Te 4/24 (diag: 0)
If the remote system state changes due to the local state administration being down, this message displays:
R2>01:32:53: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE: Changed session state to Down for
neighbor
2.2.2.1 on interface Te 2/1 (diag: 7)
Congure BFD for Static Routes
BFD oers systems a link state detection mechanism for static routes. With BFD, systems are notied 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.
Conguring BFD for static routes is a three-step process:
1. Enable BFD globally.
2. Congure static routes on both routers on the system (either local or remote).
3. Congure an IP route to connect BFD on the static routes using the ip route bfd command.
Related Conguration Tasks
• Changing Static Route Session Parameters
• Disabling BFD for Static Routes
Establishing Sessions for Static Routes
Sessions are established for all neighbors that are the next hop of a static route.
Figure 17. Establishing Sessions for Static Routes
To establish a BFD session, use the following command.
• Establish BFD sessions for all neighbors that are the next hop of a static route.
CONFIGURATION mode
ip route bfd
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Bidirectional Forwarding Detection (BFD)