Configure BFD Sessions for BGP

You can configure the intervals that a device waits to send (transmit) or receive control packets from Bidirectional Forwarding Detection (BFD) peers. You can also configure the interval after which routes are withdrawn when a BFD session is down.

1. Access global configuration mode.
   

   device# configure terminal

2. Access BGP configuration mode.
   

   device(config)# router bgp

3. (Multihop sessions only) Specify the transmit time, the receive time, and the number of consecutive control packets that must be missed before the connection to a peer is considered non-operational.
   

   device(config-bgp-router)# bfd interval 140 min-rx 125 multiplier 44

   This example specifies a transmit interval of 140 ms, the min-rx keyword followed by a receive interval of 125 ms, and the multiplier value of 44, which indicates that 44 consecutive packets must be missed before the connection to the peer is considered non-operational.

   

   Note

   For single-hop sessions, run the bfd interval command at the interface level.
4. Specify the interval after which BGP routes are withdrawn after a BFD session is declared down.
   

   device(config-bgp-router)# bfd holdover-interval 15

   This example specifies a holdover interval of 15 seconds.