Bidirectional Forwarding Detection (BFD) is a network protocol that is used to detect faults between two routers or switches connected by a link. It provides low-overhead detection of faults even on physical …

Jan 2, 2026 · BFD is a UDP-based detection protocol that provides a low-overhead method of detecting failures in the forwarding path between two adjacent routers. This includes detecting failures in...

This topic provides an overview of the Bidirectional Forwarding Detection (BFD) protocol and the different types of BFD sessions.

Mar 14, 2018 · What is BFD? For networks, failure detection is very important. There are vairous mechanisms used for this purpose. One of them is BFD (Bidirectional Forwarding Detection). In this …

Jul 30, 2015 · Bidirectional Forwarding Detection (BFD) is a network protocol that detects link failures within milliseconds or even microseconds. Routing protocols like OSPF and EIGRP have their own …

BFD definition: (a euphemistic initialism used to avoid explicit vulgarity). See examples of BFD used in a sentence.

Jul 13, 2025 · BFD is a protocol designed to rapidly detect link or path failures between two forwarding engines. It operates independently of routing protocols but works in conjunction with them to improve …

Jan 18, 2006 · BFD is a detection protocol designed to provide fast forwarding path failure detection times for all media types, encapsulations, topologies, and routing protocols. In addition to fast …

Jan 31, 2024 · Cisco’s bidirectional forwarding detection (BFD) is a mechanism that quickly finds faults and connectivity issues between two routers. BFD is protocol-independent, so it does not rely on the …

Extend BFD to allow it to detect whether a path between two systems is capable of carrying a payload of a particular size.