[c-nsp] OSPF trigger updates

[Serguei Bezverkhi]

Hello Nick,

Playing with OSPF hello/dead timers is possible but not the best approach.
If you need fast dead peer detection, BFD is much better option. It uses
less CPU and allows much better detection time than OSPF timers.

HTH


Serguei

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Nick Hilliard
Sent: Monday, July 11, 2011 1:01 PM
To: Ranjith R
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] OSPF trigger updates

On 11/07/2011 17:54, Ranjith R wrote:
> Can someone clarify , how will the OSPF behave when  neighbor on a p2p 
> link goes down , although the ethernet interface state still remain in 
> up state. Will it trigger an SPF calculation ?  If so is it after 40 
> seconds ?

It will assume that the neighbor is dead after dead-time seconds, which will
then trigger SPF.

It's quite usual these days to use a much shorter hello and dead interval
than 10/40 seconds.  I usually use hello=1 and dead=4 seconds for everything
these days.

Nick

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