Enterprise Multicast in a Service Provider Environment
The fundamental problem that service providers face today when offering native multicast services to end customers is the amount of multicast distribution information (that is [S, G] or [*, G] states) that needs to be maintained to provide the most optimal multicast traffic distribution. When a multicast source becomes active within a particular customer site, the multicast traffic must travel through the service provider network to reach all PE routers that have receivers connected to CE routers for that multicast group. To prevent unnecessary traffic delivery, the service provider must avoid sending traffic to PE routers that have no interested receivers. To accomplish this goal and achieve ...
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