"An IP Multicast Distribution Tree (MDT) may traverse both label switching (i.e.@ Multiprotocol Label Switching@ or MPLS) and nonlabel switching regions of a network. Typically@ the MDT begins and ends in non-MPLS regions@ but travels through an MPLS region. In such cases@ it can be useful to begin building the MDT as a pure IP MDT@ then convert it to an MPLS Multipoint Label Switched Path (MP-LSP) when it enters an MPLS-enabled region@ and then convert it back to a pure IP MDT when it enters a non-MPLS-enabled region. Other documents specify the procedures for building such a hybrid MDT@ using Protocol Independent Multicast (PIM) in the non-MPLS region of the network@ and using Multipoint Label Distribution Protocol (mLDP) in the MPLS region. This document extends those procedures to handle the case where the link connecting the two regions is a Virtual Routing and Forwarding (VRF) table link@ as defined in the ""BGP IP/MPLS VPN"" specification. However@ this document is primarily aimed at particular use cases where VRFs are used to support multicast applications other than multicast VPN."