Linux® Routing

Border Gateway Multicast Protocol (BGMP)

Multicast protocols need AS border router attention too. This section deals with the Border Gateway Multicast Protocol, or BGMP. BGMP comes with the capability of building multicast group trees in the style of PIM-SM, where only group members belong to the tree at any given time. However, these trees don’t consist of individual routers. Instead, each tree has only BGMP border routers as members. Once this tree is built, some domains build their own internal trees from there, depending on the protocol they are using.

The multicast domain advertising the availability of a specific range of multicast channels is considered the root for that range. Remember that multicast channels each consist of a single ...