[c-nsp] Cisco 7206VXR OSPF

[Rodney Dunn]

What is the physical topology?

Is it back to back ethernet?

On Wed, Mar 12, 2008 at 11:37:42AM -0400, Jason Berenson wrote:
> Joe,
> 
> I checked the neighbors too.  I do see the session flap there but again, 
> no errors on the ethernet and nothing really obvious as to why it 
> flapped.  This just started in the past few days.  I do see some CPU 
> spikes to 100% but it doesn't correlate exactly to when the flap occurred.
> 
> -Jason
> 
> Joe Freeman wrote:
> >If OSPF is flapping, you should see it on the neighbor attached to 
> >that interface as well, so you might look there for issues.
> >
> >Joe
> >
> >On 3/12/08, *Jason Berenson* <jason at pins.net <mailto:jason at pins.net>> 
> >wrote:
> >
> >    Rodney,
> >
> >    The interface is clean.  No errors/drops at all.  I think I'll have to
> >    snoop that segment like you suggested and wait for it to flap again.
> >
> >    Thanks,
> >
> >    Jason
> >
> >
> >    Rodney Dunn wrote:
> >    > Look for intput drops on the 'sh int'.
> >    >
> >    > If you don't see any you probably need a sniffer trace on the
> >    > ethernet segment.
> >    >
> >    > On Tue, Mar 11, 2008 at 03:53:30PM -0400, Jason Berenson wrote:
> >    >
> >    >> Greetings,
> >    >>
> >    >> We have a few 7206's running OSPF/BGP for routing.  All of the
> >    routers
> >    >> are fine except for one - I noticed a few times in the past
> >    week where
> >    >> OSPF/BGP flapped and came back right away.
> >    >>
> >    >> I checked CPU and noticed it peaked in the past hour but that
> >    doesn't
> >    >> really correlate to the time the routing sessions flapped.  I also
> >    >> didn't see the ethernet connection go down and I don't see any
> >    errors on
> >    >> either side of the ethernet.
> >    >>
> >    >> If there are any outputs anyone would expect please let me know
> >    and I'll
> >    >> promptly reply.  This is the first time I'm faced with a
> >    problem like
> >    >> this so I'm not really sure where to look other then the things
> >    I've
> >    >> already tried.
> >    >>
> >    >> Much thanks in advance,
> >    >> Jason Berenson
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