[c-nsp] C2691-BGP Scanning process.

[Tantsura, Jeff]

As other people already said 2691 is not right platform to do full IRT.
Ping RT increases because ICMP processing is a low priority process, so
when routers CPU is busy with BGP - ICMP has to wait.

Jeff

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Montes, Carlos M
Sent: Wednesday, November 24, 2004 3:31 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] C2691-BGP Scanning process.

I have three Cisco 2691 routers, each with a single T-1 circuit
connected to and ISP.  I see that the BGP Scanning process causes the
CPU to spike up 100% every 15 seconds or so.  When this happens and I
PING through the T-1's out to the directly attached router at the ISP,
the ping round trip increases from about 4 ms to 400 ms.
We are accepting the full routing table and no default routes or
networks.  Shouldn't these routers be able to handle BGP without
affecting their performance?  They all have 256MB of RAM.
Any suggestions on what to do different here?  I considered asking the
ISP's for default routes and filter everything else, or simply just ask
them for a default route, but it seems a shame not to be able to choose
the shortest BGP path instead of just following a default.  I kind of
like the full routing table.

Carlos

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