[c-nsp] BGP timers

[Oliver Boehmer (oboehmer)]

Uddin, Tahir <> wrote on Tuesday, April 08, 2008 1:57 PM:

 
> When connecting a CE to a PE, is there a minimum recommended BGP hold
> down timer. I am currently using 90 seconds with both of my carriers
> but it is causing applications to time out when there is a failure in
one
> of the carriers network or if a local loop goes down. One of the
carriers
> ruled out going down to 15 seconds, said it was too low.

it all depends on scaling.. you can go down below 15 seconds (and even
lower) with a handful of sessions, but this doesn't scale if you're
talking hundreds or thousands of peers and lot of routing activity,
which is why most SPs avoid using low timers..

	oli