Bfd Packet Format - Dell S4048–ON Configuration Manual

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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 system clears the poll bit and sets the final bit in its

response. The poll and final bits are used during the handshake and in Demand mode (refer to

Dell Networking OS does not currently support multi-point sessions, Demand mode,

authentication, or control plane independence; these bits are always clear.

Bidirectional Forwarding Detection (BFD)