[42275] in North American Network Operators' Group
Re: slowing down every 60 seconds due to BGP scaner
daemon@ATHENA.MIT.EDU (tang bing)
Fri Sep 14 15:16:58 2001
Message-ID: <20010914185040.86787.qmail@web13908.mail.yahoo.com>
Date: Fri, 14 Sep 2001 11:50:40 -0700 (PDT)
From: tang bing <tang_bing@yahoo.com>
To: Chris Konger <ckonger@internap.com>
Cc: nanog@merit.edu
In-Reply-To: <3BA24D5E.10331B16@internap.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Errors-To: owner-nanog-outgoing@merit.edu
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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