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Explicit Route Multicast (ERM)

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Joel Bion , Dino Farinacci , Mike Shand , Alex Tweedly
Last updated 2000-07-06
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Conventional multicast builds a tree structure from the source of a multicast stream to the destinations of that stream. Multicast packets are forwarded from the sources down the tree by each intervening router. Each router contains state information to determine the next hop forwarding destination(s) for a packet. Where there are a large number of groups, this gives rise to a scaling problem. The amount of state to be stored in the routers becomes impossibly large. It is attractive to consider the use of multicast to provide applications such as n-way voice and video conferencing, which would require a very large number (perhaps millions) of relatively small (between 3 and 10 members) multicast groups.


Joel Bion
Dino Farinacci
Mike Shand
Alex Tweedly

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)