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Understanding Interface Configuration Inheritance
For example, the ssm command could be executed from the multicast-routing configuration submode like
this:
RP/0/RP0/CPU0:router(config)#
RP/0/RP0/CPU0:router(config-mcast-ipv4)#
Alternatively, you could issue the same command from the global or XR config mode like this:
RP/0/RP0/CPU0:router(config)#
The following multicast protocol-specific submodes are available through these configuration submodes:
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.
Cisco IOS XR Multicast Configuration Guide for the Cisco CRS Router, Release 5.2.x
66
Implementing Multicast Routing on Cisco IOS XR Software
multicast-routing
ssm range
multicast-routing ssm range
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