Conveying path setup type in PCEP messages
draft-ietf-pce-lsp-setup-type-07

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Document Type Active Internet-Draft (pce WG)
Last updated 2017-12-19
Replaces draft-sivabalan-pce-lsp-setup-type
Stream IETF
Intended RFC status Proposed Standard
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Send notices to Julien Meuric <julien.meuric@orange.com>
PCE Working Group                                           S. Sivabalan
Internet-Draft                                       Cisco Systems, Inc.
Intended status: Standards Track                             J. Tantsura
Expires: June 22, 2018                                        Individual
                                                                I. Minei
                                                            Google, Inc.
                                                                R. Varga
                                               Pantheon Technologies SRO
                                                             J. Hardwick
                                                     Metaswitch Networks
                                                       December 19, 2017

               Conveying path setup type in PCEP messages
                    draft-ietf-pce-lsp-setup-type-07

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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   This Internet-Draft will expire on June 22, 2018.

Sivabalan, et al.         Expires June 22, 2018                 [Page 1]
Internet-Draft             PCE path setup type             December 2017

Copyright Notice

   Copyright (c) 2017 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Path Setup Type Capability TLV  . . . . . . . . . . . . . . .   4
   4.  Path Setup Type TLV . . . . . . . . . . . . . . . . . . . . .   5
   5.  Operation . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
     7.1.  PCEP TLV Type Indicators  . . . . . . . . . . . . . . . .   7
     7.2.  New Path Setup Type Registry  . . . . . . . . . . . . . .   8
     7.3.  PCEP-Error Object . . . . . . . . . . . . . . . . . . . .   8
   8.  Contributors  . . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     10.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     10.2.  Informative References . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   [RFC5440] describes the Path Computation Element communication
   Protocol (PCEP) for communication between a Path Computation Client
   (PCC) and a Path Computation Element (PCE), or between a PCE and a
   PCE.  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.

   [RFC8231] 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 of an
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