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Title : An Effective Solution for Multicast Scalability:The
MPLS Multicast Tree (MMT)
Author(s) : A. Boudani, B. Cousin
Filename : draft-boudani-mpls-multicast-tree-01.txt
Pages : 10
Date : 03-Jun-02
A multicast router should keep forwarding state for every multicast
tree passing through it. The number of forwarding states grows with
the number of groups. In this paper, we present a new approach, the
MPLS multicast Tree (MMT), which utilizes MPLS LSPs between
multicast tree branching node routers in order to reduce forwarding
states and enhance scalability. In our approach only routers that
are acting as multicast tree branching node routers for a group
need to keep forwarding state for that group. All other non-
branching node routers simply forward data packets by traffic
engineered unicast routing using MPLS LSPs. We can deduce that our
approach can be largely deployed because it uses for multicast
traffic the same unicast MPLS forwarding scheme. We will briefly
discuss the multicast scalability problem, related works and
different techniques for forwarding state reduction. We discuss also
the advantages of our approach, and conclude that it is feasible and
promising. Finally, we analytically evaluate our approach.
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