[nsp] dot1q causes port error?

[Oleksandr Pantus]

Hello !

On Wed, 27 Nov 2002, Stephen J. Wilcox wrote:

> Continues..
> 
>  have tried 12.0(21)S5
>  have tried 12.2(12a)
> 
> Still errors...
> 
> I can only assume these bugs are leading me astray and perhaps I just have a
> plain old hardware fault?
> 
> Steve

AFAIK, output errors on interface mean one has hardware faults. In your
first msg (the one in this thread with "sh int" printout) I have see too
many output errors (underruns) at router's side.

> On Tue, 26 Nov 2002, Stephen J. Wilcox wrote:
> 
> > Ok,
> >  have switched to ISL
> >  have turned off keepalives
> >  have moved to IOS 12.0(5)WC5a
> > 
> > And the errors are still there..
> > 
> > Again, these show as output errors on teh rtr and input on sw. Perhaps the rtr
> > has a bug and is generating this? [See separate email on changing rtr ios,
> > perhaps that will fix this issue too!]
> > 
> > Steve
> > 
> > 
> > On Mon, 25 Nov 2002, Temkin, David wrote:
> > 
> > > It's a known issue caused by keepalives.
> > > 
> > > See bug CSCdr22809
> > > 
> > > It's a hardware limitation on the switch.  The router sends keepalives
> > > untagged and the switch can't deal with it.
> > > 
> > > Convert the trunk to ISL and they will go away.  I promise. :-)
> > > 
> > > -Dave
> > > 
> > > > -----Original Message-----
> > > > From: Stephen J. Wilcox [mailto:steve@telecomplete.co.uk] 
> > > > Sent: Monday, November 25, 2002 2:00 PM
> > > > To: cisco-nsp@puck.nether.net
> > > > Subject: [nsp] dot1q causes port error?
> > > > 
> > > > 
> > > > Hi,
> > > > 
> > > > I've a Cat2924-XL-EN (c2900XL-c3h2s-mz-120.5.2-XU.bin) 
> > > > connecting to a 7200 with IO-FE (c7200-js-mz.122-8.T5)
> > > > 
> > > > I'm running dot1q on them and seeing errors. I'm sure theres 
> > > > no cable fault and have replicated this with different 
> > > > hardware. I'm unable to find anything in the bug toolkit 
> > > > (which doesnt appear to support IOS for switches very well) 
> > > > and google showed nothing useful either.
> > > > 
> > > > ANyone else seen this and perhaps knows the problem?
> > > > 
> > > > relevant counters (no others show error)
> > > > 
> > > > Switch:
> > > >      Received 89 broadcasts, 1698991 runts, 0 giants, 0 throttles
> > > >      1819995 input errors, 121004 CRC, 0 frame, 44 overrun, 
> > > > 132 ignored
> > > > 
> > > > Router:
> > > >      16687740 packets output, 3005655898 bytes, 299991 underruns
> > > >      299991 output errors, 0 collisions, 0 interface resets
> > > > 
> > > > Note the errors occur in the direction router to switch.
> > > > 
> > > > Also, pinging the switch or devices beyond the switch doesnt 
> > > > appear to produce any packet loss that ought to be associated 
> > > > to errored frames
> > > > 
> > > > Any thoughts?
> > > > 
> > > > Steve
> > > > 
> > > > 
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-- 
S/Y,
Alexander, MD, 			nic-hdl: AJP1-UANIC