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Multicast Addr. Exten. & Simple Transmitter Opti.

Document Charter Multicast Addr. Exten. & Simple Transmitter Opti. WG (maestro)
Title Multicast Addr. Exten. & Simple Transmitter Opti.
Last updated 2011-12-09
State Approved
WG State Concluded
IESG Responsible AD (None)
Charter edit AD (None)
Send notices to (None)

As we continue to deploy multicast services across the internet, we 
continue to learn more about the scaling, deployment, and usage 
propereties of IP multicast. This BoF proposes to discuss two possible 
architectural enhancements to the existing multicast services which may 
improve the acceptance and widespread usage of multicast. The first of 
these is the possiblity of using a two-part global multicast address 
with the goal of easing address allocation headaches and the use of 
shared resources in ISP backbones. The second is to provide a slightly 
different multicast service to groups where there is a single source and 
thereby achieve greater scalability if there is a large number of such 

The purpose of the BoF is to air these issues with the community at 
large and to ascertain if there is sufficient interest in pursuing this 
direction to form a Working Group to produce corresponding protocol and 
operational specifications.

Some of this work has been presented at prior IETFs and other forums, so 
the BoF will not be of a tutorial nature (i.e. there will not be 
presentations of the earlier work on "Simple Multicast" and "Express"). 
Rather, we will discuss the relationship between these (and other) 
proposals and the current trajectory for multicast deployment in the 
Internet as a whole. We hope to ascertain if employing some or all of 
these techniques could accelerate deployment, or result in higher 
confidence that widespread multicast will be more scalable, debuggable, 
and robust.

In order to start the discussion prior to Oslo, it would be convenient 
to use an existing mailing list: Participants 
should have read the following material prior to attending the BoF: