All things related to multicast

["Julian Y. Koh" <>]

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Short question:

We here at NU are working on a project where we're looking at the
possibility of sharing multicast video with another school, but with that
school only.  What's the brain trust's opinion on how we should think about
setting that up in terms of what group addresses to use?

Longer version w/ more detail:

We have a set of 37 video channels that we distribute to our campus and, in
the case of 2 of those (CSPAN and CSPAN2), to Internet2 and private
multicast-enabled peers.  The CSPAN channels obviously use our GLOP
addressing (233.0.103.0/24), and all the other channels are on
administratively scoped groups from the 239/8 block.

Another school in the area is thinking about using the same video solution,
and thus came up with the idea of sharing some of the costs with us and
getting some of their channels from our encoders.  We are planning on
setting up a private BGP peering session, probably via MREN.

This content would only be sent to this other school, so we don't want to
use our GLOP addressing.  OTOH, it seems like we don't really want to use
239/8 space either, since that opens us up to possible group address
overlap.  Plus, we have filters on our border router that would block 239/8
traffic.  We could make exceptions, but exceptions in router configurations
are, as I'm sure we'd all agree, are not fun.

So, is there some middle ground between 239/8 and GLOP addressing that
exists for something like this?

Thanks in advance!


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-- 
Julian Y. Koh                         
<mailto:>
Network Engineer                                   <phone:847-467-5780>
Telecommunications and Network Services         Northwestern University
PGP Public Key:<http://bt.ittns.northwestern.edu/julian/pgppubkey.html>