[51615] in North American Network Operators' Group
Re: AT&T NYC
daemon@ATHENA.MIT.EDU (Petri Helenius)
Mon Sep 2 13:47:41 2002
Date: Mon, 02 Sep 2002 20:46:13 +0300
From: Petri Helenius <pete@he.iki.fi>
To: bdragon@gweep.net
Cc: alex@yuriev.com, nanog@merit.edu
Errors-To: owner-nanog-outgoing@merit.edu
bdragon@gweep.net wrote:
> With link-state, one interface flap can mean doing SPF on every route.
Only if you learned every one of your routes from different neighbor.
If you have two exits and 100000 routes, you calculate twice and
apply the results to the prefixes.
Note that this does not apply to a proprietary, "hybrid", semi-link
state protocol marketed with name "EIGRP" where all routes need
per-prefix calculation. (OSPF and IS-IS work fine)
Pete
