From: Roman Rodichev (roman@iementor.com)
Date: Sun May 25 2008 - 15:23:45 ART
You can configure SA message filtering between two MSDP peers, so that they
don't get messages from each other. Then you would need to override unicast
BGP paths with multicast BGP paths.
Also you can use multicast BGP if let's say you have two physical links
between two eBGP peers, and you want to use one link for unicast and another
link for multicast.
Roman Rodichev
5xCCIE #7927 (R&S, Security, Voice, Storage, Service Provider)
Instructor, Content Developer. ieMentor Corporation
http://www.iementor.com
Y!M: roman7927
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Thor
Kopp
Sent: Sunday, May 25, 2008 10:28 AM
To: GS
Subject: MSDP & MBGP
I was working on an lab with MSDP & MBGP only to realise that Multicast BGP
was doing nothing ie if i just has ipv4 unicast BGP working with my MSDP
peers, multicast worked fine. Can anyone give me a few scenarios owhen we
would need to use multicast BGP and also mesh groups under MSDP as i'm a
little hazzy on those as well.
The only thing that i can think of with multicast BGP is if you had an rfp
failure based on your unicast routing table and you weren't allow to use the
'ip mroute' command, then you could advertise your RP within multicast over
a different peer to override your standard rpf check as MBGP routes are
preferred over unicast routes. Is my understanding correct here?
1. Static mroutes
2. DVMRP routes
3. MBGP routes
4. Unicast routes
- Thor
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