Number of messages from IFA about port state change: 0Number of messages communicated b/w Manager and Agent: 7Disabling and Re-Enabling BFDBFD is enabled on all interfaces by default, though sessions are not created unless explicitly configured.If you disable BFD, all of the sessions on that interface are placed in an Administratively Down state ( thefirst message example), and the remote systems are notified of the session state change (the secondmessage example).To disable and re-enable BFD on an interface, use the following commands.• Disable BFD on an interface.INTERFACE modeno bfd enable• Enable BFD on an interface.INTERFACE modebfd enableIf you disable BFD on a local interface, this message displays:R1(conf-if-te-4/24/1)#01:00:52: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE:Changed session state to AdDn for neighbor 2.2.2.2 on interface Te 4/24/1 (diag: 0)If the remote system state changes due to the local state administration being down, this messagedisplays:R2>01:32:53: %RPM0-P:RP2 %BFDMGR-1-BFD_STATE_CHANGE: Changed session stateto Down for neighbor2.2.2.1 on interface Te 2/1/1 (diag: 7)Configure BFD for Static RoutesBFD offers systems a link state detection mechanism for static routes. With BFD, systems are notified toremove static routes from the routing table as soon as the link state change occurs, rather than waitinguntil 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 Routes136 Bidirectional Forwarding Detection (BFD)