Reference Guide

Important Point to Remember
If you use a Loopback interface with a /32 mask as the RP, you must enable PIM Sparse-mode on the
interface.
Configuring PIM-SM
Configuring PIM-SM is a three-step process.
1. Enable multicast routing (refer to the following step).
2. Select a rendezvous point.
3. Enable PIM-SM on an interface.
Enable multicast routing.
CONFIGURATION mode
ip multicast-routing
Related Configuration Tasks
The following are related PIM-SM configuration tasks.
• Configuring S,G Expiry Timers
• Configuring a Static Rendezvous Point
• Configuring a Designated Router
• Creating Multicast Boundaries and Domains
Enable PIM-SM
You must enable PIM-SM on each participating interface.
1. Enable multicast routing on the system.
CONFIGURATION mode
ip multicast-routing
2. Enable PIM-Sparse mode.
INTERFACE mode
ip pim sparse-mode
Example of Viewing PIM-SM Interfaces
Example of Viewing PIM Neighbors
Example of Viewing the PIM Multicast Routing Table
To display which interfaces are enabled with PIM-SM, use the show ip pim interface command
from EXEC Privilege mode.
Dell#show ip pim interface
Address Interface VIFindex Ver/ Nbr Query DR DR
Mode Count Intvl Prio
189.87.5.6 Gi 4/11 0x2 v2/S 1 30 1 127.87.5.6
189.87.3.2 Gi 4/12 0x3 v2/S 1 30 1 127.87.3.5
PIM Sparse-Mode (PIM-SM)
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