Wireshark-dev: [Wireshark-dev] VXLAN not decoded when UDP src port is 921

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From: kundan kumar <kundank3069@xxxxxxxxx>
Date: Sun, 11 Jan 2026 11:38:49 +0530

Hello Wireshark Dev Team,

I am sending valid VXLAN packets with UDP destination port 4789. When the UDP source port is an ephemeral (high-numbered) port, Wireshark decodes the packets correctly as VXLAN. However, when the UDP source port is 921 and the destination port is still 4789, the same packets are decoded as LWRES instead of VXLAN. Could you please help explain why this behavior occurs?

Thanks,
Kundan