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Reg,
Have
you checked that the auto-detect / duplex settings are correctly
negotiated?
If you have a NIC running half-duplex and
the switch port set to full duplex then you can have "lock ups". The NIC
will detect a collision if it sends a packet at the same time as the
switch. The switch won't think there is a problem so it won't try to
resent it's packet, and it's up to higher level protocols to detect that
something went wrong. This should only be temporary though (
60secs max) so if the client dies completely this probably isn't your problem.
In
this case, ethereal won't be able to help too much here as it won't see the
collisions. But if you use a managed switch you can check for runts
and fragments via the RMON1 etherstats table. If not you can
keep an eye on "netstat -s" on the ME box and see if the
"Segments Retransmitted" is increasing. Apps only your local LAN should see very
few TCP retransmissions.
HTH
Alistair
I’m sort of troubleshooting a
windows me network for someone. All the machines on the network randomly
lock up, though I’ve noticed that transferring data on the network seems to
trigger the lockups. I’ve swapped out switches and all nics use the same
driver which I’ll be updating, but it is possible that a bad nic or cabling
somewhere would be causing this? If so, how do I spot a bad nic with
ethereal on a switched network? Should the data just look like garbage
or do I need to look for something? Will the source IP still be legible
so I can spot the
culprit?
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