Length

Transport 2 octets UDP datagram unverified

Header plus data, in octets. Never below 8.

Reading a capture

Redundant with the IP length one lane up, and the two disagreeing is a classic malformed-packet signature. The sample coherence check validates it against the resolved extent, so an incoherent example fails the build.

Where it sits

UDP Datagram > Length

Open in the explorer — UDP over IPv6, in a QoS Data frame
Open in the explorer — UDP over IPv4, in a QoS Data frame

Accuracy

Clause: RFC 768
Byte order: big-endian — network byte order
Verified: Not verified against the standard. Treat this as a claim, not a fact.