Configuration
Configuring PIM-DM requires the following steps:
• Enable IP multicast on each PIM router (see Enabling IP Multicast Routing)
• Enable PIM-DM on the desired interfaces (see Enabling PIM-DM)
This section provides the configuration steps for configuring PIM-DM and examples for a relevant scenario.
Topology
In this network topology, the Source_1 address is 10.10.1.52 and the group address is set to 224.0.1.3.
Figure 4-1: PIM-DM Configuration Topology
In this example, all routers are running PIM-DM.
1. Host_1 sends an IGMP membership report to Subnet 1.
2. After Router_C receives this report, it associates its receiving interface, eth1, with the group reported in the IGMP message, for example, group1.
3. Source_1 then sends a data packet for group1.
4. Every router creates an (S,G) entry in the multicast routing table.
5. When the data packet reaches Router_C, it forwards via the interface, eth1, because there is a local member on this interface for this group. Router_C has a downstream receiver, so it does not send a prune message to its upstream neighbor router, Router_B.
Last modified date: 07-14-2023