I-D ACTION:draft-celer-vpn-mcast-00.txt

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	Title		: Interworking between IP VPN and shared backbone 
                          multicast domains
	Author(s)	: A. Celer
	Filename	: draft-celer-vpn-mcast-00.txt
	Pages		: 9
	Date		: 17-Nov-00
	
This draft introduces an interworking function between shared backbone
multicast domain and VPN multicast domain. The architecture that 
follows is similar to Multicast Border Router functionality, however the
mapping is defined not as a mapping between two different multicast 
protocols, but two different multicast topologies the under assumption 
that the shared backbone multicast topology will be shared between VPNs 
for carrying the traffic. The main assumption made in this draft is that 
multicast packets are replicated on PE device (router) for scalability 
and performance reasons.  However, it is possible to extend the solution
and replicate packets on CE devices. The proposed mapping of addresses 
to topology solves the issue of scalability of multicast addresses to 
state knowledge in the core.  This draft also identifies three types of
multicast capabilities for the core.

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