1.601: How do I trace ethernet packets on an AIX system?

Do the following:

     iptrace -i en0 /tmp/ipt

The iptrace backgrounds.  Find its process id and kill it when you are
ready.  Then run

     ipreport -rns /tmp/ipt >/tmp/ipr

and look at the output.  The current version of Info does not document
the r, n and s options but they are quite useful for layering the output.