Complete Protocol dictionary, glossary and reference

BFD: Bidirectional Forwarding Detection

Bidirectional Forwarding Detection (BFD) is a network protocol used to detect faults between two forwarding engines. BFD provides low-overhead, low-latency detection of faults even on physical media that don't support failure detection of any kind, such as ethernet, virtual circuits, tunnels and MPLS LSPs. BFD establishes a session between two endpoints over a particular link. If more than one link exists between two systems, multiple BFD sessions may be established to monitor each one of them. The session is established with a three-way handshake, and is torn down the same way.

Standard Organization

IETF

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