[c-nsp] Cisco 7204 VXR strange behavior

[Raymond Macharia]

I did a "sh ip cache flow" and all traffic was being dumped there. Even with
all the routes pointing to null zero for BGP removed it was still doing the
same.

Weird thing is that after a hard reset all was back to normal without any
change to configs.
I suspect a software bug
On 5/22/06, Rodney Dunn <rodunn at cisco.com> wrote:
>
> How do you know the traffic was going to Null0?
>
> Very unlikely the router just decided to dump traffic to Null0
> for no reason. I've never heard of that.
>
> Do you have 'sh ip route' 'sh ip cef' debug ip policy, etc..
> to prove it and what the config looked like at the time?
>
> On Mon, May 22, 2006 at 11:05:47AM +0300, Raymond Macharia wrote:
> > Hello,
> >
> > I have had a very strange phenomenon on a Cisco 7204 VXR router running
> IOS
> > version 12.3(5).
> > It is running normal non fancy configs, basic eigrp and BGP and route
> maps.
> >
> > The router's CPU suddenly went up to 99% and after checking on the log
> and
> > flow out put I realized that it was dumping traffic to the null 0
> interface.
> > after some checks I realized the route maps were doing this because when
> I
> > removed them this disappeared and the router CPU went down to 30% ( my
> > normal usage)
> > This route maps have been there and no other change was made.
> > Has anyone had this problem?
> > --
> > Raymond
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>



-- 
Raymond Macharia