From: Scott Morris (swm@emanon.com)
Date: Wed Feb 21 2007 - 19:01:29 ART
According to the spec for MSDP (trying to remember specifics from long ago
when I first started teaching this), if you have more than one peering
relationship, you are supposed to run MBGP for efficiency.
There have been many tests over the years in lab environments where this is
not TECHNICALLY necessary, but then again in a lab, we rarely care about the
CPU usage or overall efficiency of stuff because we have no "real" traffic
anyway!
So you'll find that it honestly is not necessary as far as your lab goes
(because MBGP isn't on the blueprint and was specifically mentioned in one
of the NetPro discussions about not being tested on ta this point), but in
real life you will likely want to.
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, JNCIE
#153, CISSP, et al.
CCSI/JNCI-M/JNCI-J
IPexpert VP - Curriculum Development
IPexpert Sr. Technical Instructor
smorris@ipexpert.com
http://www.ipexpert.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Filyurin, Yan
Sent: Wednesday, February 21, 2007 2:44 PM
To: ccielab@groupstudy.com
Subject: MSDP and MBGP
Hello Group Study. Is there any kind of rule regarding when multiprotocol
BGP is needed when running MSDP. So far my only experience with MSDP was
when configuring Anycast RP in a and it worked great in a regular IGMP
domain, even with more than two RPs and done in a mesh group. As was
reading more documentation on it, I was seeing more and more hints that MBGP
is always required, and was becoming more and more confused. So far, it
seems like, when using default peer, is the only time when MBGP is not
required. So my question is, when would MBGP be required with MSDP? Under
normal conditions even between multiple ASs, if the unicast paths are
congruent to multicast RPF, I would think MSDP can work standalone without
having to do anything else. Does it sound right? And under which scenarios
would I ever need to do address an address family for ipv4 multicast in BGP
during my lab?
Thank you!
Yan Filyurin
EDS - Bank of America, Network Design
MS: MA6-536-0501
1025 Main Street
Waltham, MA 02451
Office: +1-781-788-2207
Cell: +1-617-875-4862
yan.filyurin@eds.com
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