Multicast state scalability in QoS MPLS networks

Scalability of multicast forwarding state is likely to be a major issue facing inter-domain multicast deployment, especially when having many concurrent active multicast groups. Using aggregated multicast instead of constructing a tree for each individual multicast session in the backbone network, one can have multiple multicast sessions share a single tree to reduce multicast state and tree maintenance overhead in the network core. In this paper aggregated multicast will be used within MPLS network, in order to reduce state scalability and provision scalable QoS multicast