Cisco Cisco IOS Software Release 15.0(1)S

You are familiar with IP multicast concepts and configuration tasks.

You are familiar with MVPN concepts and configuration tasks.

You are familiar with Multiprotocol Label Switching (MPLS) Layer 3 VPN concepts and 
configuration tasks.

MVPN allows a service provider to configure and support multicast traffic in an MPLS VPN 
environment. This feature supports routing and forwarding of multicast packets for each individual VPN 
routing and forwarding (VRF) instance, and it also provides a mechanism to transport VPN multicast 
packets across the service provider backbone.

A VPN is network connectivity across a shared infrastructure, such as an Internet service provider (ISP). 
Its function is to provide the same policies and performance as a private network, at a reduced cost of 
ownership, thus creating many opportunities for cost savings through operations and infrastructure.

An MVPN allows an enterprise to transparently interconnect its private network across the network 
backbone of a service provider. The use of an MVPN to interconnect an enterprise network in this way 
does not change the way that the enterprise network is administered, nor does it change general 
enterprise connectivity.

As shown in 

, in an MLDP-based MVPN, a static default multicast distribution tree (MDT) is 

established for each multicast domain. The default MDT defines the path used by provider edge (PE) 
routers to send multicast data and control messages to every other PE router in the multicast domain. A 
default MDT is created in the core network using a single MP2MP LSP. The default MDT behaves like 
a virtual LAN.