BFD can be used to monitor the liveliness of the RIP neighbors. If a BFD session, associated with a RIP neighbor fails, that RIP neighbor is declared down and all routes learned from that RIP neighbor are withdrawn from the associated route tables.
BFD is enabled for RIP by configuring the enable-bfd command within the RIP neighbor configuration context.
BFD must be also be enabled on the interface associated with the RIP neighbor. The bfd command sets the necessary transmit and receive intervals, as well as sets the optional multiplier.