Cisco Cisco IOS Software Release 12.0(22)S

Address                                                            Prio/Mode

172.16.1.3        Ethernet1/0              00:03:41/250 msec v2    1 / S

Enter the show ip rpf events command to verify information regarding the last 15 triggered multicast 
RPF check events:

router# show ip rpf events

Last 15 triggered multicast RPF check events

RPF backoff delay: 500 msec

RPF maximum delay: 5 sec

DATE/TIME             BACKOFF    PROTOCOL   EVENT         RPF CHANGES

Mar 7 00:17:07.244    500 msec   Static     Route UP        0

Mar 7 00:16:55.082    500 msec   BGP        Route UP        0

Mar 7 00:16:43.880    500 msec   ISIS       Route UP        0

Mar 7 00:16:32.692    500 msec   ISIS       Route UP        0

Mar 7 00:16:19.712    1000 sec   Static     Route UP        0

Mar 7 00:16:18.212    500 msec   Connected  Route UP        0

Mar 7 00:16:13.140    500 msec   Static     Route UP        0

Mar 7 00:16:08.160    500 msec   Connected  Route UP        0

To monitor and maintain the multicast subsecond convergence feature, use the following EXEC 
commands, as needed:

This section provides the following configuration examples:

In the following example, the ip multicast rpf interval has been set to 10 seconds. This command does 
not show up in show running-config output unless the interval value has been configured to be the 
nondefault value.

Router# show running-config

ip subnet-zero

Router# show ip pim interface 

Displays information about interfaces configured for PIM.

Router# show ip pim neighbor

Lists the PIM neighbors discovered by the Cisco IOS software.

Router# show ip rpf events

Displays the last 15 triggered multicast RPF check events.