Weird networking issue.

Tue Jan 7 21:14:09 UTC 2003

Sun's hme cards won't go full duplex even though they advertise it to
remote switch, causing immense headaches to anyone with Sun gear...

http://www.eng.auburn.edu/~rayh/solaris/solaris2-faq.html#q4.13

-alex

On Tue, 7 Jan 2003 ed at the7thbeer.com wrote:

> 
> Heh.  Tell that to my Catalyst 3548's and the E250's at the other end. ;)
> 
> Lab testing showed serious throughput issues though (expected) in
> duplex-mismatched links, and large increases in runt and mutli-collision
> counters.  CRC errors and FCS errors also rose in proportion to relative
> link saturation in a more simplistic 6500 <->7509<-> 3548 test
> environment.
> 
> 
>  > Besides, misconfigured duplex will not cause CRC errors.
> >
> > C.
> >
> > -----Original Message-----
> > From: David G. Andersen [mailto:dga at lcs.mit.edu]
> > Sent: Tuesday, January 07, 2003 2:08 PM
> > To: Drew Weaver
> > Cc: 'nanog at merit.edu'
> > Subject: Re: Weird networking issue.
> >
> >
> >
> > Rule number 1 with any ethernet:  Check to make sure you have the duplex
> > and rate statically configured, and configured identically on both ends of
> > the connection.
> >
> > I'd wager you've got half duplex set on one side, and full on the other...
> >
> >   -Dave
> >
> > On Tue, Jan 07, 2003 at 02:19:10PM -0500, Drew Weaver mooed:
> > >
> > > Hi, this is kind of a newbie question but this doesn't make a whole lot of
> > > sense :P
> > >
> > > I have an etherstack hub connected to a FastEthernet port on a cisco 3660
> > > router, these are the stats when I do a show int fast0/0:
> > >
> > > 5776 input errors, 5776 CRC, 2717 frame, 0 overrun, 0 ignored
> > >
> > > Whats weird is I just cleared the counters 12 minutes ago, and already
> > there
> > > are almost 6000 CRC errors. This connected via a standard Cat5 ethernet
> > > cable, I have tried replacing the cable to noavail.
> > >
> > > Is this a fairly normal situation, If so that's great, but it seemed
> > rather
> > > ridiculous to me, and if it is not a normal situation, what would cause
> > > this?
> > >
> > > Any ideas are appreciated.
> > > Thanks,
> > > -Drew Weaver
> >
> > --
> > work: dga at lcs.mit.edu                          me:  dga at pobox.com
> >       MIT Laboratory for Computer Science           http://www.angio.net/
> >       I do not accept unsolicited commercial email.  Do not spam me.
> >
> 