PIM-SM simplified example shows a simplified example of a PIM-SM configuration.
In the sample configuration, the following events occur:
The BSR distributes RP information to all switches in the network.
R sends an IGMP membership report to S4.
Acting on this report, S4 sends a (*,G) join message to RP.
S sends data to G.
The DR (S1 in this example) encapsulates the data that it unicasts to RP (S2) in register messages.
S2 decapsulates the data, which it forwards to S4.
S4 forwards the data to R.
If the packet rate exceeds the DR threshold, S4 sends S1 an (S,G) join message.
S1 forwards data to S4. After S4 receives data from S1, it prunes the stream from the RP.
Important
PIM-SM simplified example is a simplified example and is not the best design for a network if you locate the source and receiver as shown. In general, place RPs as close as possible to sources.