PIM-SM Configuration Example

In the following figure, the system labeled ABR1 is configured for IP multicast routing using PIM-SM.

expand icon
IP Multicast Routing Using PIM-SM Configuration Example
../Graphics/EX_mcast_0017.svg
Note

Note

The above figure is used in the OSPF chapter to describe the Open Shortest Path First (OSPF) configuration on a switch. See the OSPF section for more information about configuring OSPF.

The router labeled ABR1 has the following configuration:

configure vlan HQ_10_0_2 ipaddress 10.0.2.1 255.255.255.0
configure vlan HQ_10_0_3 ipaddress 10.0.3.1 255.255.255.0
configure vlan LA_161_48_2 ipaddress 161.48.2.2 255.255.255.0
configure vlan CHI_160_26_26 ipaddress 160.26.26.1 255.255.255.0
configure ospf add vlan all area 0.0.0.0
enable ipforwarding
enable ipmcforwarding
configure pim add vlan all sparse
tftp TFTP_SERV -g -r rp_list.pol
configure pim crp HQ_10_0_3 rp_list 30
configure pim cbsr HQ_10_0_3 30

The policy file, rp_list.pol, contains the list of multicast group addresses serviced by this RP. This set of group addresses are advertised as candidate RPs. Each router then elects the common RP for a group address based on a common algorithm. This group to RP mapping should be consistent on all routers.

The following is a policy file that configures the CRP for the address ranges 239.0.0.0/24 and 232.144.27.0:

entry extreme1 {
	if match any {
	}
		then {
			nlri  239.0.0.0/24 ;
			nlri  232.144.27.0/24 ;
	}
}