[nsp] dot1q causes port error?

[Stephen J. Wilcox]

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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> > 
> 
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