Multicast VPN Terminology

A single multicast distribution tree in the backbone that carries all the multicast traffic from a specified set of one or more multicast VPNs. An inclusive tree that carries the traffic of more than one multicast VPN is an aggregate inclusive tree. An inclusive tree contains as its members all the PE routers that attach to the receiver sites of any of the multicast VPNs using the tree.

A single multicast distribution tree in the backbone that carries traffic belonging only to a specified set of one or more multicast groups, from one or more multicast VPNs. An aggregate selective tree carries traffic for multicast groups that belong to different multicast VPNs. By default, traffic from most multicast groups could be carried by an inclusive tree, whereas traffic from high-bandwidth groups should be carried by a selective tree.