Lucent Technologies Ethereal - Manual (Page 189)

-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.
Related command line tools
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