Cisco ASR 9000 Series Software Manual page 26

Label Switched Multicast (LSM) Multicast Label Distribution Protocol (mLDP) based Multicast VPN (mVPN) Support
Label Switched Multicast (LSM) Multicast Label Distribution Protocol (mLDP)
based Multicast VPN (mVPN) Support
Label Switch Multicast (LSM) is MPLS technology extensions to support multicast using label encapsulation.
Next-generation MVPN is based on Multicast Label Distribution Protocol (mLDP), which can be used to
build P2MP and MP2MP LSPs through a MPLS network. These LSPs can be used for transporting both IPv4
and IPv6 multicast packets, either in the global table or VPN context.
Benefits of LSM MLDP based MVPN
LSM provides these benefits when compared to GRE core tunnels that are currently used to transport customer
traffic in the core:
• It leverages the MPLS infrastructure for transporting IP multicast packets, providing a common data
• It applies the benefits of MPLS to IP multicast such as Fast ReRoute (FRR) and
• It eliminates the complexity associated PIM.
Configuring MLDP MVPN
The MLDP MVPN configuration enables IPv4 multicast packet delivery using MPLS. This configuration
uses MPLS labels to construct default and data Multicast Distribution Trees (MDTs). The MPLS replication
is used as a forwarding mechanism in the core network. For MLDP MVPN configuration to work, ensure that
the global MPLS MLDP configuration is enabled. To configure MVPN extranet support, configure the source
Cisco ASR 9000 Series Aggregation Services Router Multicast Configuration Guide, Release 5.1.x
26
plane for unicast and multicast.
Implementing Layer-3 Multicast Routing on Cisco IOS XR Software