Cisco Systems 1000 Series Manual De Usuario

The Multicast Label Distribution Protocol- based Multicast VPN (MVPN) feature supports IPv4 and 
IPv6 multicast traffic over a Multi-Protocol Label Switching (MPLS) network. But a large part of the 
network infrastructure is still IP network, and the legacy IP network does not support MPLS. The 
existing MPLS over Generic Routing Encapsulation (GRE) feature provides a mechanism for tunneling 
MPLS packets over a non-MPLS network by creating a GRE tunnel across the IP network and bridging 
the separated MPLS networks. However, the existing MPLS over GRE feature does not support MPLS 
multicast traffic. The MVPN MLDP over GRE feature provides a solution by supporting encapsulating 
MPLS multicast traffic in the GRE tunnel.

 shows a sample configuration for MVPN Multicast Label Distribution Protocol over GRE 

using the PE-PE network topology. 

Ensure that MPLS Virtual Private Network (MVPN) is configured and working properly. For 
information about setting up MPLS VPNs, see:

Ensure that Multiprotocol Border Gateway Protocol (MP-BGP) is configured and working properly. 
For more information about configuring (MP-BGP), see:

The following are the restrictions that you will encounter while configuring the MVPN MLDP over GRE 
feature:

MVPN MLDP over GRE supports only IPv4 GRE.

IPv4

(No MPLS)

PE1

PE2

GRE Tunnel

MLDP over GRE

MPLS/VPN