[c-nsp] OSPF design

Mark Tinka mtinka at globaltransit.net
Sun Oct 31 05:44:54 EDT 2010


On Saturday, October 23, 2010 04:31:01 am Robert Crowe 
(rocrowe) wrote:

> There are many different reasons and topologies where
> MPLS can be extended to the access layer depending on
> technical and non-technical requirements. Perhaps Rin
> can elaborate on his topology and what he is trying to
> achieve, as it was not delved into in the previous
> email.

We're doing this because Spanning Tree is evil.

> The point that I was making was that
> summarization at the OSPF ABR is possible when running
> MPLS services and is widely used. Just remember that you
> cannot summarize (today) your main Loopback used for
> your LDP/BGP ID as there needs to be a full LSP from
> ingress-to-egress PE across areas, if you providing
> L2/L3VPN services.

The draft below seemed to address this issue:

http://tools.ietf.org/id/draft-swallow-mpls-aggregate-
fec-01.txt

Not sure whether it was picked up by anyone. Seems 
interesting.

Cheers,

Mark.
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