Users Guide

Table Of Contents
The show ip pim vrf red mcache command output displays multicast route entries.
R2# show ip pim vrf red mcache
PIM Multicast Routing Cache Table
(201.1.1.1, 224.1.1.1)
Incoming interface : port-channel11
Outgoing interface list :
vlan2001
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 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
NOTE:
If you have enabled the override option, configuring static RP without using the override option does not
remove the override configuration. You must delete the static RP configuration using the override option and then
reconfigure static RP again.
To view the RP for a multicast group, use the show ip pim rp command.
OS10# show ip pim rp
Group RP
---------------------------------
225.1.1.1 171.1.1.1
225.1.1.2 171.1.1.1
225.1.1.3 171.1.1.1
225.1.1.4 171.1.1.1
1070
Multicast