MPLS Transport Profile (MPLS-TP) Control Plane Framework
RFC 6373

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Internet Engineering Task Force (IETF)                 L. Andersson, Ed.
Request for Comments: 6373                                      Ericsson
Category: Informational                                   L. Berger, Ed.
ISSN: 2070-1721                                                     LabN
                                                            L. Fang, Ed.
                                                                   Cisco
                                                           N. Bitar, Ed.
                                                                 Verizon
                                                            E. Gray, Ed.
                                                                Ericsson
                                                          September 2011

        MPLS Transport Profile (MPLS-TP) Control Plane Framework

Abstract

   The MPLS Transport Profile (MPLS-TP) supports static provisioning of
   transport paths via a Network Management System (NMS) and dynamic
   provisioning of transport paths via a control plane.  This document
   provides the framework for MPLS-TP dynamic provisioning and covers
   control-plane addressing, routing, path computation, signaling,
   traffic engineering, and path recovery.  MPLS-TP uses GMPLS as the
   control plane for MPLS-TP Label Switched Paths (LSPs).  MPLS-TP also
   uses the pseudowire (PW) control plane for pseudowires.  Management-
   plane functions are out of scope of this document.

   This 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.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

Andersson, et al.             Informational                     [Page 1]
RFC 6373            MPLS-TP Control Plane Framework       September 2011

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6373.

Copyright Notice

   Copyright (c) 2011 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1. Introduction ....................................................3
      1.1. Scope ......................................................4
      1.2. Basic Approach .............................................4
      1.3. Reference Model ............................................6
   2. Control-Plane Requirements ......................................9
      2.1. Primary Requirements .......................................9
      2.2. Requirements Derived from the MPLS-TP Framework ...........18
      2.3. Requirements Derived from the OAM Framework ...............20
      2.4. Security Requirements .....................................25
      2.5. Identifier Requirements ...................................25
   3. Relationship of PWs and TE LSPs ................................26
   4. TE LSPs ........................................................27
      4.1. GMPLS Functions and MPLS-TP LSPs ..........................27
           4.1.1. In-Band and Out-of-Band Control ....................27
           4.1.2. Addressing .........................................29
           4.1.3. Routing ............................................29
           4.1.4. TE LSPs and Constraint-Based Path Computation ......29
           4.1.5. Signaling ..........................................30
           4.1.6. Unnumbered Links ...................................30
           4.1.7. Link Bundling ......................................30
           4.1.8. Hierarchical LSPs ..................................31