Connectivity Guide

Table Of Contents
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 configuration
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 configurations 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
Configure an RP address on every multicast enable node using the ip pim rp-address command
Configure an IP address for each interface of the nodes in the PIM-SM topology
Enable a routing protocol (OSPF) for route updates
Sample configuration in FHR node:
FHR# configure terminal
FHR(config)#
FHR(config)# ip multicast-routing
FHR(config)# interface ethernet 1/1/31
FHR(conf-if-eth1/1/31)# no switchport
FHR(conf-if-eth1/1/31)# ip address 3.3.3.2/24
FHR(conf-if-eth1/1/31)# ip pim sparse-mode
FHR(conf-if-eth1/1/31)# ip ospf 1 area 0
FHR(conf-if-eth1/1/31)# exit
FHR(config)#
FHR(config)# interface ethernet 1/1/17
Multicast
627