Debugging a simple net problem

[Donatas Gendvilas]

i've had similar problem with an old 3com nic two days ago - ping worked
in simplex mode(can see me, but i can't see a thing).
try
ifconfig xl0 media 100BaseTX mediaopt full-duplex
or
ifconfig xl0 media auto

also, sometimes after power failure switch goes mad (some cheap
trendnet) - then i must do:
ifconfig xl0 down;sleep 3;ifconfig xl0 up

-----Original Message-----
From: owner-freebsd-net at freebsd.org
[mailto:owner-freebsd-net at freebsd.org] On Behalf Of Ian
Sent: Wednesday, January 11, 2006 7:16 PM
To: freebsd-net at freebsd.org
Subject: Debugging a simple net problem

I have a fresh install of 6.0-RELEASE on an old PII-450 machine I had
lying
around.  It didn't have built-in Ethernet so I put in an old 3Com
Etherlink
III ISA card into the remaining ISA slot.

I can get an address via DHCP from my router, but I can't ping the
router.
I can ping 127.0.0.1, and the IP address the machine was assigned.  The
ifconfig and netstat -r look OK, I have addresses on my net going to ep0
and
a default route out via the router.

I'm puzzled that DHCP works but nothing else.  I configured the card
using
sysinstall but I can manually configure the card with a valid address
and
routing info, with the same result.  I'm not sure how to test further
from
here.  Can someone tell me what I might try next?

I was considering replacing the network card, but since I can DHCP the
card
does appear to work.

Thanks in advance,
Ian
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