Configure PIM for each interface to enable the interface to perform multicasting operations.
You must enable PIM globally before you configure it on an interface.
The interface uses a valid IP address.
enable
configure terminal
interface GigabitEthernet {slot/port[/sub-port][-slot/port[/sub-port]][,...][slot/all][all]}
Note
If the platform supports channelization and the port is channelized, you must also specify the sub-port in the format slot/port/sub-port.
ip pim enable
This command creates an active interface, by default.
ip pim join-prune-interval <1–18724>
ip pim hello-interval <0–18724>
Configure the interval for join and prune messages and the time between hello messages:
Switch(config-if)#ip pim join-prune-interval 60 Switch(config-if)#ip pim hello-interval 30