Shared Distribution Trees

Shared Distribution Tree

Source 1

The example in the figure shows a shared distribution tree. Router D is the root of this shared tree, which is built from router D to routers C and E toward receiver 1 and receiver 2. In PIM, the root of the shared tree is called an RP.

Packets are forwarded down the shared distribution tree to the receivers. The default forwarding state for the shared tree is identified by the notation "(*, G)" (pronounced "star comma G"), where the asterisk (*) is a wildcard entry, meaning any source, and G is the multicast group address.

© 2006 Cisco Systems, Inc. Implementing Multicast 7-35

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