Re: slowing down every 60 seconds due to BGP scaner

[tang bing <tang_bing () yahoo com>]

Thank you for all your replys !
Sorry for the lack of more info .
There are 12000s, with 12.0+ IOS , has one or more
EBGP peers and 10+ IBGP .
Customer gave us continuous ping and pinpoint this 60s
thing .

I think Chris Konger is right .
We will put more memory and enable CEF on the line
cards to see if its better .

Ben

--- Chris Konger <ckonger () internap com> wrote:
> tang bing wrote:
>
> > I found all of my backbone routers slow down every
> 60 seconds,
> > it will last 5 seconds . While this happens , the
> CPU may get 
> > more than 70% utilization and BGP scaner is the
> process that 
> > chewing the CPU (50%). Customer with video stream
> noticed that.
> > Cisco said it's normal. Any idea ?
>
> The 60 second lags will be observed with any packets
> that are
> *process* switched. Fast/CEF switching aren't
> impacted by the
> minute processes. So the more traffic you can get
> off the CPU,
> the better.
>
> BTW, if you are doing pings/traces from the routers
> to check
> this you will always observe the 60 second lags.
> This is because
> these commands are *always* process switched when
> executed on
> the router.
>
> Chris Konger
>
> PNAP Network Engineer                    
> 415-364-2105 direct
> InterNAP Network Services                
> 415-296-8611 fax
> 555 Montgomery, Suite 816                
> 415-596-4891 cell
> San Francisco CA 94111                   
> 888-841-2810 pgr


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