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This paper gives an overview of the current practical approaches under study for a scalable implementation of multicast in Layer 2 and Layer 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 required for to set up a multicast shared tree for a set of VPN networks. The methodology proposed in this paper consists of studying the effect of aggregation obtained by random shared-tree allocation on a reference model of the representative network scenario.

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Format:PDFSize:880 KB
Date:Jun 2007
Pages:8

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