[c-nsp] Interface flaps affecting BGP and IS-IS

Bøvre Jon Harald Jon.Harald.Bovre at hafslund.no
Fri Feb 19 05:46:08 EST 2010

Increasing SPD or hold-queue might help


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Fra: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] På vegne av Per Carlson
Sendt: 19. februar 2010 11:23
Til: cisco-nsp at puck.nether.net
Emne: Re: [c-nsp] Interface flaps affecting BGP and IS-IS


> We have a an edge router which connects to our upstream transit 
> provider over a 10Gbps interface. Recently, on a couple of occasions, 
> this interface has flapped resulting in BGP processes consuming ~100% 
> CPU (we are receiving a full table over this peering). Consequently, 
> when the CPU is pegged at ~100% we begin to lose IS-IS adjacencies. Is 
> there any way of mitigating against this kind of cause and effect 
> during periods of link instability - obviously the real fix is to get 
> the carrier to provide a stable link :-)

Try enabling "dampening"
on the interface.


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