Cisco CRS Series Configuration Manual page 113

Implementing Multicast Routing on Cisco IOS XR Software
Command or Action
nsf
Step 5
mdt source type interface-path-id
Example:
RP/0/RP0/CPU0:router(config-mcast-default-ipv4)#
mdt source GigE 0/1/0/0
Step 6
interface all enable
Example:
RP/0/RP0/CPU0:router(config-mcast-default-ipv4)#
interface all enable
Step 7 vrf vrf-name
Example:
RP/0/RP0/CPU0:router(config-mcast-default-)# vrf
vrf_A
Step 8
address-family {ipv4}]
Step 9 mdt default mdt-group-address
Example:
RP/0/RP0/CPU0:router(config-mcast-vrf_A-ipv4)#
mdt default 239.23.2.1
Step 10 mdt data mdt-group-address/prefix-length threshold
threshold acl-name
Example:
RP/0/RP0/CPU0:router(config-mcast-vrf_A-ipv4)#
mdt data 239.23.3.0/24 threshold 1200 acl-A
Step 11 mdt mtu size
Example:
RP/0/RP0/CPU0:router(config-mcast-default-ipv4)#
Purpose
Specifies the MDT source address.
Note
Enables multicast routing and forwarding on all new and
existing interfaces. You can also enable individual interfaces.
Caution
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.
(IPv4 MVPN configuration only) Specifies the multicast
group address range to be used for data MDT traffic.
Note
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.
This is an optional step.
Specifies the MTU size. It is recommended to configure a
high value, to accommodate the maximum multicast packet
size.
Cisco IOS XR Multicast Configuration Guide for the Cisco CRS Router, Release 5.2.x
Configuring Multicast VPN
The MDT source interface name should be the same
as the one used for BGP.
To avoid any possibility of a reverse-path
forwarding (RPF) failure, you should proactively
enable any interfaces that might possibly carry
multicast traffic.
This group range should not overlap the MDT
default group.
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