Extensions to the Path Computation Element communication Protocol (PCEP) for Inter-Layer MPLS and GMPLS Traffic Engineering
draft-ietf-pce-inter-layer-ext-11

Document Type Active Internet-Draft (pce WG)
Last updated 2016-12-02 (latest revision 2016-11-16)
Replaces draft-oki-pce-inter-layer-ext
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PCE Working Group                                                 E. Oki
Internet-Draft                      University of Electro-Communications
Intended status: Standards Track                               T. Takeda
Expires: May 20, 2017                                                NTT
                                                               A. Farrel
                                                        Juniper Networks
                                                                F. Zhang
                                           Huawei Technologies Co., Ltd.
                                                       November 16, 2016

Extensions to the Path Computation Element communication Protocol (PCEP)
           for Inter-Layer MPLS and GMPLS Traffic Engineering
                   draft-ietf-pce-inter-layer-ext-11

Abstract

   The Path Computation Element (PCE) provides path computation
   functions in support of traffic engineering in Multiprotocol Label
   Switching (MPLS) and Generalized MPLS (GMPLS) networks.

   MPLS and GMPLS networks may be constructed from layered service
   networks.  It is advantageous for overall network efficiency to
   provide end-to-end traffic engineering across multiple network layers
   through a process called inter-layer traffic engineering.  PCE is a
   candidate solution for such requirements.

   The PCE communication Protocol (PCEP) is designed as a communication
   protocol between Path Computation Clients (PCCs) and PCEs.  This
   document presents PCEP extensions for inter-layer traffic
   engineering.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [RFC2119].

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

Oki, et al.               Expires May 20, 2017                  [Page 1]
Internet-Draft              Inter-Layer PCEP               November 2016

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 20, 2017.

Copyright Notice

   Copyright (c) 2016 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
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   include Simplified BSD License text as described in Section 4.e of
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Overview of PCE-Based Inter-Layer Path Computation  . . . . .   4
   3.  Protocol Extensions . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  INTER-LAYER Object  . . . . . . . . . . . . . . . . . . .   4
     3.2.  SWITCH-LAYER Object . . . . . . . . . . . . . . . . . . .   7
     3.3.  REQ-ADAP-CAP Object . . . . . . . . . . . . . . . . . . .   9
     3.4.  New Metric Types  . . . . . . . . . . . . . . . . . . . .  10
     3.5.  SERVER-INDICATION Object  . . . . . . . . . . . . . . . .  10
   4.  Procedures  . . . . . . . . . . . . . . . . . . . . . . . . .  11
     4.1.  Path Computation Request  . . . . . . . . . . . . . . . .  11
     4.2.  Path Computation Reply  . . . . . . . . . . . . . . . . .  12
     4.3.  Stateful PCE and PCE Initiated LSPs . . . . . . . . . . .  13
   5.  Updated Format of PCEP Messages . . . . . . . . . . . . . . .  13
   6.  Manageability Considerations  . . . . . . . . . . . . . . . .  15
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
     7.1.  New PCEP Objects  . . . . . . . . . . . . . . . . . . . .  16
     7.2.  New Registry for INTER-LAYER Object Flags . . . . . . . .  16
     7.3.  New Metric Types  . . . . . . . . . . . . . . . . . . . .  17
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
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