[nsp] dot1q causes port error?

[Stephen J. Wilcox]

Hi David,
 this is actually saying it is a problem in ISL and NOT in dot1q, I have seen a
similar reference and have disabled keepalives. THis makes no difference tho,
the errors are there as before.

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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> > 
> 
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