Cisco XR 12000 Series Configuration Manual page 51

Implementing Multicast Routing on Cisco IOS XR Software Cisco ASR 9000 Series Routers
Command or Action
Step 7
address-family ipv6
Example:
RP/0/0/CPU0:router(config-mcast-default-ipv4)#
address-family ipv6
Step 8
interface all enable
Example:
RP/0/0/CPU0:router(config-mcast-default-ipv6)#
interface all enable
Step 9
vrf vrf-name
Example:
RP/0/0/CPU0:router(config-mcast-default-ipv6)#
vrf vrf_A
vrf vrf_A [address-family {ipv4}]
Step 10
Step 11
mdt default mdt-group-address
Example:
RP/0/0/CPU0:router(config-mcast-vrf_A-ipv4)#
mdt default 239.23.2.1
Step 12
mdt data mdt-group-address/prefix-length
threshold threshold acl-name
Example:
RP/0/0/CPU0:router(config-mcast-vrf_A-ipv4)#
mdt data 239.23.3.0/24 threshold 1200 acl-A
OL-
Purpose
(Optional—IPv6 MVPN configuration only) Enters
address-family ipv6 configuration submode.
Note If you want to enable nonstop forwarding (NSF) for
IPv6 VRFs, it requires global IPv6 configuration,
because NSF is available only there.
(Optional—IPv6 MVPN configuration only) Enables
multicast routing and forwarding on all new and existing
interfaces. You can also enable individual interfaces.
To avoid any possibility of a reverse-path
Caution
forwarding (RPF) failure, you should proactively
enable any interfaces that might possibly carry
multicast traffic.
Configures a VPN routing and forwarding (VRF) instance
and enters VRF configuration mode.
Specifies the virtual routing and forwarding instance for the
ipv4 address family.
Specifies the multicast distribution tree (MDT) default
group address.
Both IPv4 and IPv6 address families of the same vrf
Note
should have the same MDT group address.
(IPv4 MVPN configuration only) Specifies the multicast
group address range to be used for data MDT traffic.
This group range should not overlap the MDT
Note
default group.
This is an optional command. The default threshold beyond
which traffic is sent using a data MDT group is 1 kbps.
However, you may configure a higher threshold, if desired.
You may also, optionally, configure an access list to limit
the number of groups to be tunneled through a data MDT
group. Traffic from groups not on the access-list continues
to be tunneled using the default MDT group.
Multicast Configuration Guide
How to Implement Multicast Routing
MCC-43