API Guide

Configure PIM-SSM
To configure a group range for PIM-SSM:
NOTE: The IP range, 232.0.0.0/8 is reserved for SSM. You do not have to explicitly configure this range.
1. Create an ACL rule to specify the range of addresses that should use SSM.
OS10# configure terminal
OS10(config)# ip access-list ssm-1
OS10(config-ipv4-acl)# permit ip any 236.0.0.0/8
OS10(config-ipv4-acl)# exit
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
Configure 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
Configure 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
Override bootstrap router updates
A bootstrap router (BSR) is a router in a PIM domain that helps to automatically discover the Rendezvous Point (RP) for a given
multicast group in a multicast network. PIM routers use the BSR to obtain the RP IP address. You can also statically configure
an IP address for the RP. If you configure a static RP for a group, to override BSR updates with the static RP configuration, use
the override option in the ip pim rp-address command. If you do not explicitly use the override option and:
● The prefix length of the static RP is the same as the RP advertised in the BSR updates, the BSR RP takes precedence over
the statically configured RP.
● If the prefix length of the static RP and the BSR RP does not match, OS10 selects the router having the longest-match
prefix as the RP.
To override BSR updates:
OS10# configure terminal
OS10(config)# ip pim rp-address 20.1.1.1 255.1.2.3/24 override
806
Multicast