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List:       freebsd-net
Subject:    ep0 broadcast problem
From:       owen.grover () ts-associates ! com
Date:       2002-02-25 10:57:41
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I'm using FreeBSD 4.5 on a Toshiba Tecra 8100 with a 3COM 3C589 PCMCIA LAN 
card. The problem I am having is that when broadcast packets are sent I 
see them twice in tcpdump running on the same machine, with a split second 
difference in the timestamp for each packet. I know the broadcast packet 
is actually only being sent once onto the network as when I run tcpdump on 
another machine it sees the packet only once. Therefore it would appear 
that the broadcast packet is being looped back up through the TCP/IP 
stack. Also if I try this on another machine using Intel cards (fxp0) the 
problem goes away, so it would seem to point to the PCMCIA card or driver 
as the source of the problem.

If this problem has been documented before, my apologies for dragging up 
old issues and would someone point me to the relevant document; else any 
one with any ideas?

Owen Grover

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