Bfd Packet Format - Dell S6000–ON Configuration Manual

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NOTE: A session state change from Up to Down is the only state change that triggers a link state

change in the routing protocol client.

BFD Packet Format

Control packets are encapsulated in user datagram protocol (UDP) packets. The following illustration

shows the complete encapsulation of a BFD control packet inside an IPv4 packet.

Figure 9. BFD in IPv4 Packet Format

Diagnostic Code

The reason that the last session failed.

The current local session state. Refer to

A bit that indicates packet function. If the poll bit is set, the receiving system must

respond as soon as possible, without regard to its transmit interval. The responding

Bidirectional Forwarding Detection (BFD)