Implementing Multicast Routing on Cisco IOS XR Software Cisco ASR 9000 Series Routers
How to Implement Multicast Routing
MCC-43
Multicast Configuration Guide
OL-
Step 7
address-family ipv6
Example:
RP/0/0/CPU0:router(config-mcast-default-ipv4)#
address-family ipv6
(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.
Step 8
interface all enable
Example:
RP/0/0/CPU0:router(config-mcast-default-ipv6)#
interface all enable
(Optional—IPv6 MVPN configuration only) Enables
multicast routing and forwarding on all new and existing
interfaces. You can also enable individual interfaces.
Caution To avoid any possibility of a reverse-path
forwarding (RPF) failure, you should proactively
enable any interfaces that might possibly carry
multicast traffic.
Step 9
vrf vrf-name
Example:
RP/0/0/CPU0:router(config-mcast-default-ipv6)#
vrf vrf_A
Configures a VPN routing and forwarding (VRF) instance
and enters VRF configuration mode.
Step 10
vrf vrf_A [address-family {ipv4}]
Specifies the virtual routing and forwarding instance for the
ipv4 address family.
Step 11
mdt default mdt-group-address
Example:
RP/0/0/CPU0:router(config-mcast-vrf_A-ipv4)#
mdt default 239.23.2.1
Specifies the multicast distribution tree (MDT) default
group address.
Note Both IPv4 and IPv6 address families of the same vrf
should have the same MDT group address.
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
(IPv4 MVPN configuration only) Specifies the multicast
group address range to be used for data MDT traffic.
Note This group range should not overlap the MDT
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.
Command or Action Purpose
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