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

[Per Carlson]

Hi

> 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"
(http://www.cisco.com/en/US/docs/ios/iproute_pi/command/reference/iri_pi1.html#wp1011620)
on the interface.

-- 
Pelle

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