http://www.rfc-editor.org/rfc/rfc6215.txt
RFC 6215: MPLS Transport Profile User-to-Network and Network-to-Network Interfaces, M. Bocci, L. Levrau, D. Frost2011-04-01T23:00:00-00:00This document is a product of a joint Internet Engineering Task Force (IETF) / International Telecommunication Union Telecommunication Standardization Sector (ITU-T) effort to include an MPLS Transport Profile within the IETF MPLS and Pseudowire Emulation Edge-to-Edge (PWE3) architectures to support the capabilities and functionalities of a packet transport network as defined by the ITU-T. This document is not an Internet Standards Track specification; it is published for informational purposes.