John,
Is it just CDP not working or is the whole PVC showing as inactive? I've
seen where if LMI was configured incorrectly at the remote end when the
router was first brought up it would come up but after a minute or so go
down because it wasn't receiving lmi keepalives from the switch. In this
case it was a telco switch problem and I do know that LMI is supposed to be
autosensing with the newer software.
If it is just CDP down I would have suggested something to do with the
timers but you said the remote end isn't receiving any packets at all?
Hmmm.
Stumper.
Just throwing out some ideas for ya. Let us know when you get it figured
out.
Thanks
Cory
-----Original Message-----
From: John Neiberger [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, July 12, 2000 12:44 PM
To: [EMAIL PROTECTED]
Subject: RE: CDP not working on subinterface
We use entirely point-to-point subinterfaces, and we have no special
configuration on them regarding broadcasts. On this particular major
interface, there are 90 subinterfaces and CDP is working just fine on all
but two of them. They all have identical configs except for the DLCIs and
IP addresses. "show cdp int" shows that CDP packets are being sent, but
they aren't being received at the opposite end, according to "debug cdp
packets".
Another oddity about this is that it worked correctly when I first brought
the circuit up for about a minute or so, and then it stopped. Very
strange...
> This is purely a guess.......
>
> Are you allowing broadcasts across the PVC by using the broadcast keyword
> on the frame-relay map command? CDP sends to a multicast address.
>
> Priscilla
>
>
>
> At 08:50 PM 7/11/00, John Neiberger wrote:
> >No, I haven't done that, but I did "show cdp int" and the router said
that
> >it was sending cdp packets out that interface. Both routers on each end
of
> >the link reported this. I'll try debugging tomorrow.
> >
> >Thanks for the tip!
> >
> >John
> >
> > > Did you run "debug cdp" to verify that it is being sent?
> > >
> > > -Mag
> > >
> > > --------------------------------------------------------
> > > Magnus Thorne
> > > eVoice, Inc.
> > > 1394 Williow Road
> > > Menlo Park, CA 94025
> > > Direct: 650.330.3974
> > > Main: 650.330.3700
> > > Fax: 650.330.3901
> > > --------------------------------------------------------
> > > eVoice. The best voicemail you can buy is free.
> > > Sign up at www.evoice.com or call 1.800.GET.EVOICE
> > >
> > >
> > > -----Original Message-----
> > > From: John Neiberger [mailto:[EMAIL PROTECTED]]
> > > Sent: Tuesday, July 11, 2000 3:08 PM
> > > To: [EMAIL PROTECTED]
> > > Subject: CDP not working on subinterface
> > >
> > >
> > > We do not have CDP disabled anywhere on our routers, either globally
or
> >at
> > > the interface level. I brought up a new PVC today and at the remote
side
> >I
> > > could see both PVCs to that router. After a few seconds, though,
one of
> > > them disappeared from the "show cdp neighbors" output. No changes
were
> >made
> > > to configs at either side, it just did this on it's own. This
particular
> > > PVC is terminating at a subinterface on both routers, and other
> > > subinterfaces on the major interfaces at each end still report their
cdp
> > > neighbors correctly; the problem is only on this particular
> >subinterface.
> > >
> > > I have noticed this in the past with a different PVC, so it's
happened at
> > > least twice in our network.
> > >
> > > any ideas why it works temporarily and then quits?
> > >
> > > TIA,
> > > John Neiberger
> > >
> > >
> > >
> > >
> > >
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> ________________________
>
> Priscilla Oppenheimer
> http://www.priscilla.com
>
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