Lucent Technologies Ethereal manual L3pid, Srcport destport

Related command line tools

-e l3pid	Include a dummy Ethernet header before each packet. Specify the
	L3PID for the Ethernet header in hex. Use this option if your dump
	has Layer 3 header and payload (e.g. IP header), but no Layer 2 en-
	capsulation. Example: -e 0x806 to specify an ARP packet.
	For IP packets, instead of generating a fake Ethernet header you can
	also use -l 12 to indicate a raw IP packet to Ethereal. Note that -l 12
	does not work for any non-IP Layer 3 packet (e.g. ARP), whereas
	generating a dummy Ethernet header with -e works for any sort of L3
	packet.
-u srcport destport	Include dummy UDP headers before each packet. Specify the source
	and destination UDP ports for the packet in decimal. Use this option
	if your dump is the UDP payload of a packet but does not include
	any UDP, IP or Ethernet headers. Note that this automatically in-
	cludes appropriate Ethernet and IP headers with each packet. Ex-
	ample: -u 1000 69 to make the packets look like TFTP/UDP packets.

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