Cisco XR 12000 Series Configuration Guide

Implementing Multicast Routing on Cisco IOS XR Software Cisco ASR 9000 Series Routers
Information About Implementing Multicast Routing
MCC-21
Multicast Configuration Guide
OL-
• PIM Configuration Submode, page MCC-21
• IGMP Configuration Submode, page MCC-21
• MLD Configuration Submode, page MCC-21
• MSDP Configuration Submode, page MCC-21
Multicast-Routing Configuration Submode
When you issue the multicast-routing ipv4 or multicast-routing ipv6 command, all default multicast
components (PIM, IGMP, MLD, MFWD, and MRIB) are automatically started, and the CLI prompt
changes to “config-mcast-ipv4” or “config-mcast-ipv6”, indicating that you have entered
multicast-routing configuration submode.
PIM Configuration Submode
When you issue the router pim command, the CLI prompt changes to “config-pim-ipv4,” indicating that
you have entered the default pim address-family configuration submode. To enter pim address-family
configuration submode for IPv6, type the address-family ipv6 keyword together with the router pim
command before pressing Enter.
IGMP Configuration Submode
When you issue the router igmp command, the CLI prompt changes to “config-igmp,” indicating that
you have entered IGMP configuration submode.
MLD Configuration Submode
When you issue the router mld command, the CLI prompt changes to “config-mld,” indicating that you
have entered MLD configuration submode.
MSDP Configuration Submode
When you issue the router msdp command, the CLI prompt changes to “config-msdp,” indicating that
you have entered router MSDP configuration submode.
Understanding Interface Configuration Inheritance
Cisco IOS XR software allows you to configure commands for a large number of interfaces by applying
command configuration within a multicast routing submode that could be inherited by all interfaces. To
override the inheritance mechanism, you can enter interface configuration submode and explicitly enter
a different command parameter.
For example, in the following configuration you could quickly specify (under router PIM configuration
mode) that all existing and new PIM interfaces on your router will use the hello interval parameter of
420 seconds. However, Packet-over-SONET/SDH (POS) interface 0/1/0/1 overrides the global interface
configuration and uses the hello interval time of 210 seconds.
RP/0/0/CPU0:router(config)# router pim
RP/0/0/CPU0:router(config-pim-default-ipv4)# hello-interval 420
RP/0/0/CPU0:router(config-pim-default-ipv4)# interface pos 0/1/0/1
RP/0/0/CPU0:router(config-pim-ipv4-if)# hello-interval 210

Cisco XR 12000 Series Specifications

General

Brand	Cisco
Model	XR 12000 Series
Category	Network Router
Language	English