I-D ACTION:draft-jibiki-iwata-mboned-idmf-00.txt

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	Title		: Inter-Domain Multicast Forwarding (IDMF)
	Author(s)	: M. Jibiki, A. Iwata
	Filename	: draft-jibiki-iwata-mboned-idmf-00.txt
	Pages		: 25
	Date		: 13-Mar-00
	
This draft proposes a new inter-domain multicast forwarding (IDMF)
mechanism for PIM-SM multicast routing protocol. Although there have
been various inter-domain multicast routing and forwarding protocols,
they still have a limitation for handling policy routing, QoS
routing, accounting and security, which network administrators are
willing to use in their network. In order to solve this limitation,
we propose a novel approach to create an inter-domain multicast
forwarding tree (or routing table) among multiple PIM-SM domains with
logical unicast paths over which multicast packets are forwarded or
flooded. The logical unicast paths are created by either IP-in-IP
tunneling method , IP masquerade-like method, and MPLS label switched
path (LSP) method, which can easily reuse policy routing and QoS
routing for unicast routing. These logical unicast paths are
established among IDMF capable nodes or proxies, which are located
within each PIM-SM domain, either manually or by a dynamic IDMP tree
construction protocol. The IDMP capable nodes can also behave a proxy
sender of multicast packets. It can prevent a multicast receiver from
changing a RP-tree into a global SP-tree, and also can help to reduce
virtually the number of multicast sources for a particular multicast
group. This property can be effectively used for accounting, security
and scalability enhancement required for interdomain communication.
The proposed mechanism is a general framework for inter-domain
multicast forwarding and can be also used as a MSDP based forwarding
mechanism.

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