BFD is used to detect a communications failure with an OSPF forwarding plane next-hop. BFD detects failures in under one second. BFD augments the OSPF Hello mechanism. The OSPF Hello interval defaults to 10 seconds. With high speed data rates, a failure requiring multiple seconds to detect can result in significant data loss. The OSPF implementation of the BFD protocol uses the following non-configurable parameters:
Use the bfd all-intfs-on command in OSPF router configuration mode to enable BFD on all OSPF interfaces.