Cisco ASR 9000 Series Software Manual page 66

Configuring Multicast VPN
• The MDT group address should be the same for both the address families in the same VRF.
Enabling a VPN for Multicast Routing
This task enables multicast VPN routing for IPv4.
The MDT group address is used by provider edge (PE) routers to form a virtual PIM "neighborship" for the
MDT. This enables the PEs to communicate with other PEs in the VRF as if they shared a LAN.
When sending customer VRF traffic, PEs encapsulate the traffic in their own (S,G) state, where the G is the
MDT group address, and the S is the MDT source for the PE. By joining the (S,G) MDT of its PE neighbors,
a PE router is able to receive the encapsulated multicast traffic for that VRF.
Although the VRF itself may have many multicast sources sending to many groups, the provider network
needs only to install state for one group per VRF, in other words, the MDT group.
SUMMARY STEPS
1. configure
2. multicast-routing
3. address-family ipv4
4. nsf
5. mdt source type interface-path-id
6. interface all enable
7. vrf vrf-name
8. address-family {ipv4}]
9. mdt default mdt-group-address
10. mdt data mdt-group-address/prefix-length threshold threshold acl-name
11. mdt mtu size
12. interface all enable
13. commit
DETAILED STEPS
Command or Action
Step 1
configure
Step 2
multicast-routing
Example:
RP/0/RSP0/CPU0:router(config)# multicast-routing
Step 3 address-family ipv4
Example:
RP/0/RSP0/CPU0:router(config-mcast)#
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 5.1.x
66
Implementing Layer-3 Multicast Routing on Cisco IOS XR Software
Purpose
Enters multicast routing configuration mode.
Enters ipv4 address-family submode.