Lots of input errors...

Shawn Ramsey shawn at buzzardnews.com
Sun Jul 20 00:56:59 PDT 2003


> >> Hello:
> >>
> >> Judging from your output I would say two things:
> >>
> >> 1) You have a bad cable.  CRC and framing errors are usually a result
of
> > bad
> >> media.
> >> 2) You should set the port to auto/auto, not 100/Full hard set, unless
you
> >> have specifically set that up in rc.conf.  If one side is hard set and
the
> >> other is set to auto, you will see lots of runts because of a duplex
> >> mismatch.  I think the RFC states you have to go to half duplex if you
are
> >> autosensing and the other side doesn't respond, which is the case if
it's
> >> hard set.
> >
> > Ok.. It is set hard to 100BT/FD on both ends. I don't know if you saw
this,
> > but since resetting the stats a few hours ago, it shows no errors at all
on
> > their end, but were still getting errors on our end... The CRC and frame
> > errors could have been from a media mismatch when things were first
setup.
> > Im not sure if the stats have ever been reset. Assuming the errors stay
at
> > zero on their end, any ideas? Am going to try another server/router, and
if
> > things look better, start replacing hardware on this router...
> >
>
> I would say the physical wire is probably bad.  Seeing unidirectional
errors
> in this case wouldn't be uncommon; one of the pair of the receive wires
may
> have issues.  Have you swapped the cable?  Most of the time you won't see
> framing errors related to duplex mismatching.

It turned out to be a NIC issue. It was a 3COM 3c980C-TXM or something like
that... I switched it to the braindead rl0 onboard adapter and the errors,
and problems went away... pretty sad that "The worst ethernet adapter ever
made" (according to the person who wrote the driver) beats out a pricey 3com
adapter, although its probably just a driver issue.










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