Cisco ASR 9000 Series - Page 67

PurposeCommand or Action
address-family ipv4
Specifies that nonstop forwarding (NSF) maintains the
forwarding state in case of a disruption to a multicast
process.
nsf
Example:
RP/0/RSP0/CPU0:router(config-mcast-default-ipv4)#
Step 4
nsf
Specifies the MDT source address.
mdt source type interface-path-id
Step 5
Example:
RP/0/RSP0/CPU0:router(config-mcast-default-ipv4)#
The MDT source interface name should be the
same as the one used for BGP.
Note
mdt source GigE 0/1/0/0
Enables multicast routing and forwarding on all new and
existing interfaces. You can also enable individual
interfaces.
interface all enable
Example:
RP/0/RSP0/CPU0:router(config-mcast-default-ipv4)#
Step 6
To avoid any possibility of a reverse-path
forwarding (RPF) failure, you should proactively
enable any interfaces that might possibly carry
multicast traffic.
Caution
interface all enable
Configures a VPN routing and forwarding (VRF) instance
and enters VRF configuration mode.
vrf vrf-name
Example:
RP/0/RSP0/CPU0:router(config-mcast-default-)# vrf
Step 7
vrf_A
Specifies the virtual routing and forwarding instance for the
ipv4 address family.
address-family {ipv4}]
Step 8
Specifies the multicast distribution tree (MDT) default group
address.
mdt default mdt-group-address
Example:
RP/0/RSP0/CPU0:router(config-mcast-vrf_A-ipv4)#
Step 9
mdt default 239.23.2.1
(IPv4 MVPN configuration only) Specifies the multicast
group address range to be used for data MDT traffic.
mdt data mdt-group-address/prefix-length threshold
threshold acl-name
Step 10
Example:
RP/0/RSP0/CPU0:router(config-mcast-vrf_A-ipv4)#
This group range should not overlap the MDT
default group.
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.
mdt data 239.23.3.0/24 threshold 1200 acl-A
You may also, optionally, configure an access list to limit
the number of groups to be tunneled through a data MDT
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 5.1.x
67
Implementing Layer-3 Multicast Routing on Cisco IOS XR Software
Configuring Multicast VPN