The firewall supports Bidirectional Forwarding Detection
(BFD) (
RFC 5880), a protocol that recognizes a failure
in the bidirectional path between two routing peers. BFD failure
detection is extremely fast, providing for a faster failover than can
be achieved by link monitoring or frequent dynamic routing health
checks, such as Hello packets or heartbeats. Mission-critical data
centers and networks that require high availability and extremely
fast failover need the extremely fast failure detection that BFD
provides.