[c-nsp] OSPF NSSA Question

[Gert Doering]

Hi,

On Sun, Oct 03, 2004 at 10:29:13PM -0400, Jon Lewis wrote:
> BGP timers are configurable...though I've never messed with them, so I
> don't know how advisable it is to tune them down.

When being used as an IGP, there's nothing wrong with tuning them to
really low values.  "been there, done that".

"Out there", you are trading somewhat slower convergence and reaction to 
peer failure against external flaps (and high CPU load) if you tear down 
sessions too eagerly.  

In the IGP, you want fast convergence, and instabilities shouldn't spread 
outside your local AS.  In the situation discussed, there are only a 
handful routes on each BGP session, so CPU churn isn't a major issue
either.

gert

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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de