[c-nsp] CPU anomoly on 3560G when adding a BGP peer

Wyatt Mattias Ishmael Jovial Gyllenvarg wyatt.eliasson at gmail.com
Tue Sep 11 05:57:13 EDT 2007


Hi all

We have a strange behavior on a 3560G that is running IBGP + some EBGP.

It is a route-reflector client to our one core machine and it takes in
a few EBGP peers.
Now we want a certain set of prefixes to go another way then the core
node calculates as "best".

We there for setup a peer with another core node (not RR-client) and
filtered out the prefixes and set them weight 1 in the incoming
route-map.

This all works well except we get 85% CPU usage and we cannot see what
process is using it.
All bgp ques are stable and the total prefix count is ~2000.

I assumed it was a routing loop but could not trace it.

Any guesses?

Best regards
Mattias Gyllenvarg
Omnitron
Sweden


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