Conveying path setup type in PCEP messages
draft-ietf-pce-lsp-setup-type-08

Document Type Active Internet-Draft (pce WG)
Last updated 2018-01-16
Replaces draft-sivabalan-pce-lsp-setup-type
Stream IETF
Intended RFC status Proposed Standard
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PCE Working Group                                           S. Sivabalan
Internet-Draft                                       Cisco Systems, Inc.
Intended status: Standards Track                             J. Tantsura
Expires: July 19, 2018                                        Individual
                                                                I. Minei
                                                            Google, Inc.
                                                                R. Varga
                                               Pantheon Technologies SRO
                                                             J. Hardwick
                                                     Metaswitch Networks
                                                        January 15, 2018

               Conveying path setup type in PCEP messages
                    draft-ietf-pce-lsp-setup-type-08

Abstract

   A Path Computation Element can compute Traffic Engineering (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.

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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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   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 July 19, 2018.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Sivabalan, et al.         Expires July 19, 2018                 [Page 1]
Internet-Draft             PCE path setup type              January 2018

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   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
   LSP by sending a new ERO.  The PCC uses this ERO to re-route the LSP
   in a make-before-break fashion.  [RFC8281] specifies a mechanism
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