Connectivity Guide

2. Enable PIM-SSM for the range of addresses using the ip pim ssm-range command.
OS10(config)# ip pim ssm-range ssm-1
You can use the show ip pim ssm-range command to view the groups added in PIM-SSM configuration.
OS10# show ip pim ssm-range
Group Address / MaskLen
236.0.0.0 / 8
Expiry timers for S, G entries
You can configure expiry timers for S, G entries globally. The S, G entries expire in 210 seconds by default.
To configure the S, G expiry timer:
OS10# configure terminal
OS10(config)# ip pim sparse-mode sg-expiry-timer 500
Static rendezvous point
The rendezvous point (RP) is an interface on a router that acts as the root to a group-specific tree; every group must have an
RP. You must configure the RP on all nodes in your network.
To configure a static RP:
OS10# configure terminal
OS10(config)# ip pim rp-address 171.1.1.1 group-address 225.1.1.3/32
Designated router
Multiple PIM-SM routers can connect to a single local area network (LAN) segment. One of these routers is elected as the
designated router (DR).
The DR is elected using hello messages. Each PIM router learns about its neighbors by periodically sending a hello message out
of each PIM-enabled interface. Hello messages contain the IP address of the interface from where it is sent and a DR priority
value. The router with the greatest priority value becomes the DR. If the priority value is the same for two routers, the router
with the highest IP address is the DR. By default, the DR priority value is 1, so the IP address determines the DR.
To configure DR priority, use the following command:
OS10# configure terminal
OS10(config)# interface vlan 100
OS10(conf-if-vl-100)# ip pim dr-priority 200
PIM commands
clear ip pim tib
Clears PIM tree information from the PIM database.
Syntax
clear ip pim [vrf vrf-name] tib
Parameters vrf vrf-name—Enter the keyword vrf, then the name of the VRF.
Default None
Command Mode EXEC PRIVILEGE
Multicast 619