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IP Multicast Configuration Examples |
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Introduction
IP multicasting is a bandwidth-conserving technology that reduces traffic because it simultaneously delivers a single stream of information to thousands of corporate recipients and homes. This document discusses the basics of how to configure multicast for various networking scenarios. The "Source" in the examples throughout this document represents the source of multicast traffic, and "Receiver" represents the receiver of multicast traffic.
Network Diagram
Multicast with PIM dense mode
Introduction
The basic assumption behind PIM-DM is that the multicast packet stream has receivers at most locations. That is, it is assumed that most (or at least many) subnets in the network will want any given multicast packet. Multicast data is initially sent to all hosts in the network. Routers that do not have any interested hosts then send PIM Prune messages to remove themselves from the tree. PIM-DM starts by flooding the multicast traffic, and then stopping it to each link where it is not needed, using a Prune message. This example uses simple dense mode for multicast.
Configuration Router A
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