All things related to multicast

[Bob Riddle <>]

FYI 

-------- Original Message --------

Subject:	draft-savola-v6ops-tunneling-01.txt
Date:	Fri, 7 May 2004 18:16:21 -0700
From:	Stewart Tansley
To:

IPv6 Internet2 workgroup -- the IETF v6ops workgroup is discussing
http://www.ietf.org/internet-drafts/draft-savola-v6ops-tunneling-01.txt.
You might take a look at it with an academic requirements perspective.

I have a hypothesis that more widespread IPv6 adoption in Internet2 is
constrained by multicast availability:

- Many scenarios of interest to the academic community benefit from or
depend on multicast (intra- & inter-campus scenarios, distance learning,
etc.).
- Developers believe that IPv6 native will provide multicast, but IPv6
native is still some way off in terms of widespread deployment in the
US, so the apps are not built.
- Developers are not aware of tunneling technologies that can handle
IPv6 multicast, so they stick with IPv4 (multicast).

Questions:
1. Do you think this is accurate?
2. What sort of real demand exists for IPv6 multicast in the Internet2
community? Anyone using it today? Anyone being held up by lack of
availability?
3. Is IPv6 multicast needed in any common scenario which has
unicast-only connectivity in IPv4?
4. Can point-to-point tunnels to central routers meet the QoS
requirements, or does multicast traffic really need to take the shortest
path between participants?

Stewart Tansley, Ph.D. 
http://research.microsoft.com/collaboration/university/ 



-- 
Bob Riddle ()    Technologist,Internet2
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