Administrator Guide

Table Of Contents
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)
Configure BFD for Static Routes
BFD offers systems a link state detection mechanism for static routes. With BFD, systems are notified 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.
Configuring BFD for static routes is a three-step process:
1. Enable BFD globally.
2. Configure static routes on both routers on the system (either local or remote).
3. Configure an IP route to connect BFD on the static routes using the ip route bfd command.
Related Configuration 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 12. 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
120
Bidirectional Forwarding Detection (BFD)