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Multicast traffic aggregation in MPLS-based VPN networks

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4 Author(s)
Isaias Martinez-Yelmo ; Univ. Carlos III de Madrid, Madrid ; David Larrabeiti ; Ignacio Soto ; Piotr Pacyna

This article gives an overview of the current practical approaches under study for a scalable implementation of multicast in layer 2 and 3 VPNs over an IP-MPLS multiservice network. These proposals are based on a well-known technique: the aggregation of traffic into shared trees to manage the forwarding state vs. bandwidth saving trade-off. This sort of traffic engineering mechanism requires methods to estimate the resources needed to set up a multicast shared tree for a set of VPNs. The methodology proposed in this article consists of studying the effect of aggregation obtained by random shared tree allocation on a reference model of a representative network scenario.

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IEEE Communications Magazine  (Volume:45 ,  Issue: 10 )