Port

Bfd packet capture

Bfd packet capture
  1. What is a BFD packet?
  2. What is BFD used for?
  3. What is BFD echo packet?
  4. What port does BFD use?

What is a BFD packet?

The Bidirectional Forwarding Detection (BFD) protocol is a simple hello mechanism that detects failures in a network. A pair of routing devices exchange BFD packets. The devices send hello packets at a specified, regular interval.

What is BFD used for?

Bidirectional Forwarding Detection (BFD) is a network protocol that is used to detect faults between two routers or switches connected by a link.

What is BFD echo packet?

BFD is a simple hello/echo protocol used to provide millisecond failure detection for other protocols such as IGPs, BGP, and a few others. BFD allows those protocols to continue with their intended purpose, while offloading the responsibility of link failure detection.

What port does BFD use?

BFD Control packets is transmitted in UDP packets with destination port 3784, BFD also uses port 4784 for multihop paths. Source port is in the range 49152 through 65535. And BFD Echo packets are encapsulated in UDP packet with destination port 3785.

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