Conveying path setup type in PCEP messages
draft-ietf-pce-lsp-setup-type-02

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Document Type Active Internet-Draft (pce WG)
Last updated 2015-04-20
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PCE Working Group                                           S. Sivabalan
Internet-Draft                                                 J. Medved
Intended status: Standards Track                     Cisco Systems, Inc.
Expires: October 22, 2015                                       I. Minei
                                                            Google, Inc.
                                                               E. Crabbe

                                                                R. Varga
                                               Pantheon Technologies SRO
                                                             J. Tantsura
                                                                Ericsson
                                                             J. Hardwick
                                                     Metaswitch Networks
                                                          April 20, 2015

               Conveying path setup type in PCEP messages
                  draft-ietf-pce-lsp-setup-type-02.txt

Abstract

   A Path Computation Element can compute traffic engineering paths (TE
   paths) through a network that are subject to various constraints.
   Currently, TE paths are label switched paths (LSPs) which are set up
   using the RSVP-TE signaling protocol.  However, other TE path setup
   methods are possible within the PCE architecture.  This document
   proposes an extension to PCEP to allow support for different path
   setup methods over a given PCEP session.

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
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   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 22, 2015.

Copyright Notice

   Copyright (c) 2015 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . 4
   3.  Path Setup Type TLV . . . . . . . . . . . . . . . . . . . . . . 5
   4.  Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
   5.  Security Considerations . . . . . . . . . . . . . . . . . . . . 7
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 7
   7.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 7
   8.  Normative References  . . . . . . . . . . . . . . . . . . . . . 7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 8

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1.  Introduction

   [RFC5440] describes the Path Computation Element Protocol (PCEP) for
   communication between a Path Computation Client (PCC) and a Path
   Control Element (PCE) or between one a pair of PCEs.  A PCC requests
   a path subject to various constraints and optimization criteria from
   a PCE.  The PCE responds to the PCC with a hop-by-hop path in an
   Explicit Route Object (ERO).  The PCC uses the ERO to set up the path
   in the network.

   [I-D.ietf-pce-stateful-pce] specifies extensions to PCEP that allow a
   PCC to delegate its LSPs to a PCE.  The PCE can then update the state
   of LSPs delegated to it.  In particular, the PCE may modify the path
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