[184859] in North American Network Operators' Group
Re: IGP choice
daemon@ATHENA.MIT.EDU (Mark Tinka)
Fri Oct 23 05:15:33 2015
X-Original-To: nanog@nanog.org
To: "marcel.duregards@yahoo.fr" <marcel.duregards@yahoo.fr>, nanog@nanog.org
From: Mark Tinka <mark.tinka@seacom.mu>
Date: Fri, 23 Oct 2015 11:15:27 +0200
In-Reply-To: <5629F721.7050004@yahoo.fr>
Errors-To: nanog-bounces@nanog.org
On 23/Oct/15 11:00, marcel.duregards@yahoo.fr wrote:
> by having multiple areas, therefore ABR which deny routers and network
> LSA, you introduce summarization (ABR only send summary LSA, mean
> subnet info, not topology info) in your network.
> Thus you loose informations and do not have a complete topology of
> your network. I guess MPLS/TE prefer to seat on top of a real topology =
?
Yes, summarization in the IGP has the potential to create blackholes
and/or loops.
This reminds me of:
http://tools.ietf.org/id/draft-swallow-mpls-aggregate-fec-01.txt
Mark.
