[c-nsp] Cisco 7206VXR OSPF

[Rodney Dunn]

No.

Good idea to just turn off logging to the console via
"no logg con"

Rodney

On Wed, Mar 12, 2008 at 05:35:12PM -0400, Jason Berenson wrote:
> Rodney,
> 
> They connect back to a cisco switch.  No errors anywhere along the 
> ethernet and no packet loss.  It also only flapped 3 times yesterday and 
> 2 times 5 days ago, so it's not a constant flap.
> 
> It hasn't flapped yet today, so I'll turn on debugging and setup a snoop 
> and write back when I have something.  About the debugging - will 
> turning on the commands suggested (ospf event or ospf adj)  have an 
> averse affect on the routers performance?
> 
> Thanks,
> Jason
> 
> Rodney Dunn wrote:
> >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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