Connectivity Guide
show ip rpf
Displays reverse path forwarding (RPF) information.
Syntax
show ip rpf [vrf vrf-name] [source-address] [summary]
Parameters
• vrf vrf-name—Enter the keyword vrf, then the name of the VRF.
• source-address—Enter the source address in dotted-decimal format (A.B.C.D).
• summary—RPF summary.
Default None
Command Mode EXEC
Usage Information Use static mroutes to control the reachability of the multicast sources. If a PIM-registered multicast source is
reachable using static mroute as well as a unicast route, PIM examines the distance of each route. The route with
shorter distance is the one that PIM selects for reachability.
Example
OS10# show ip rpf
RPF information for 101.1.1.10
RPF interface: vlan103
RPF neighbor: 2.1.1.1
RPF route/mask: 101.1.1.0/255.255.255.0
RPF type: Unicast
RPF information for 171.1.1.1
RPF interface: vlan105
RPF neighbor: 3.1.1.1
RPF route/mask: 171.1.1.0/255.255.255.0
RPF type: Unicast
Supported Releases 10.4.3.0 or later
PIM-SM sample conguration
This section describes how to enable PIM-SM in the FHR, RP, and LHR nodes using the topology show in the following illustration.
To enable PIM-SM, perform the following congurations on each of the nodes (FHR, RP, and LHR):
• Enable multicast routing on all the nodes using the ip multicast-routing command
• Enable PIM-SM on all the required Layer 3 interfaces of the nodes using the ip pim sparse-mode command
• Congure an RP address on every multicast enable node using the ip pim rp-address command
• Congure an IP address for each interface of the nodes in the PIM-SM topology
• Enable a routing protocol (OSPF) for route updates
Multicast
655