Cisco Cisco IOS Software Release 12.0(22)S

To display how IP multicast routing does Reverse Path Forwarding (RPF), use the show ip rpf EXEC 
command.

show ip rpf {source-address | source-name} [metric]

If no source is specified, all sources are displayed.

EXEC

The router can reverse path forward from multiple routing tables (that is, the unicast routing table, 
Distance Vector Multicast Routing Protocol (DVMRP) routing table, or static mroutes). This command 
tells you from where the information is retrieved.

The following is sample output of the show ip rpf command:

Router# show ip rpf 171.69.10.13

RPF information for sj-eng-mbone.cisco.com (171.69.10.13)

RPF interface: BRI0

RPF neighbor: eng-isdn-pri3.cisco.com (171.69.121.10)

RPF route/mask: 171.69.0.0/255.255.0.0

RPF type: unicast

RPF recursion count: 0

Doing distance-preferred lookups across tables

The following is sample output of the show ip rpf command when the metric command is specified:

Router# show ip rpf 171.69.10.13 metric

RPF information for sj-eng-mbone.cisco.com (171.69.10.13)

RPF interface: BRI0

RPF neighbor: eng-isdn-pri3.cisco.com (171.69.121.10)

RPF route/mask: 171.69.0.0/255.255.0.0

RPF type: unicast

source-address | 
source-name

Displays the RPF information for the specified source address or name.

(Optional) Displays the unicast routing metric.

11.0

This command was introduced.

12.1(2)T

The metric keyword was added.

12.0(18)ST

This command was integrated into Cisco IOS Release 12.0(18)ST.

12.0(22)S

This command was integrated into Cisco IOS Release 12.0(22)S.