PCEP Extensions for MPSL-TE LSP Path Protection with stateful PCE
draft-ananthakrishnan-pce-stateful-path-protection-02

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PCE Working Group                                     H. Ananthakrishnan
Internet-Draft                                             Packet Design
Intended status: Standards Track                            S. Sivabalan
Expires: July 13, 2017                                             Cisco
                                                                C. Barth
                                                                R. Torvi
                                                        Juniper Networks
                                                                I. Minei
                                                             Google, Inc
                                                               E. Crabbe
                                                         January 9, 2017

   PCEP Extensions for MPSL-TE LSP Path Protection with stateful PCE
         draft-ananthakrishnan-pce-stateful-path-protection-02

Abstract

   A stateful Path Computation Element (PCE) is capable of computing as
   well as controlling via Path Computation Element Protocol (PCEP)
   Multiprotocol Label Switching Traffic Engineering Label Switched
   Paths (MPLS LSP).  Furthermore, it is also possible for a stateful
   PCE to create, maintain, and delete LSPs.  This document describes
   PCEP extension to associate two or more LSPs to provide end-to-end
   path protection.

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Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Ananthakrishnan, et al.   Expires July 13, 2017                 [Page 1]
Internet-Draft      Stateful PCE LSP Path Protection        January 2017

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  PCEP Extensions . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Path Protection Association Type  . . . . . . . . . . . .   4
     3.2.  Path Protection Association TLV . . . . . . . . . . . . .   5
   4.  Operation . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  PCE Initiated LSPs  . . . . . . . . . . . . . . . . . . .   6
     4.2.  PCC Initiated LSPs  . . . . . . . . . . . . . . . . . . .   6
     4.3.  State Synchronization . . . . . . . . . . . . . . . . . .   7
     4.4.  Error Handling  . . . . . . . . . . . . . . . . . . . . .   7
   5.  IANA considerations . . . . . . . . . . . . . . . . . . . . .   7
     5.1.  Association Type  . . . . . . . . . . . . . . . . . . . .   7
     5.2.  PPAG TLV  . . . . . . . . . . . . . . . . . . . . . . . .   7
     5.3.  PCEP Errors . . . . . . . . . . . . . . . . . . . . . . .   8
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   9
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     8.1.  Normative References  . . . . . . . . . . . . . . . . . .   9
     8.2.  Information References  . . . . . . . . . . . . . . . . .  10
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

1.  Introduction

   [RFC5440] describes PCEP for communication between a Path Computation
   Client (PCC) and a PCE or between one a pair of PCEs.  A PCE computes
   paths for MPLS-TE LSPs based on various constraints and optimization
   criteria.

   Stateful pce [I-D.ietf-pce-stateful-pce] specifies a set of
   extensions to PCEP to enable stateful control of paths such as MPLS
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