Path Computation Element Communication Protocol (PCEP) Extensions for PCE-Initiated LSP Setup in a Stateful PCE Model
RFC 8281

Document Type RFC - Proposed Standard (December 2017; No errata)
Last updated 2017-12-21
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Stream WG state Submitted to IESG for Publication
Document shepherd Julien Meuric
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IESG IESG state RFC 8281 (Proposed Standard)
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Send notices to "Julien Meuric" <julien.meuric@orange.com>
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Internet Engineering Task Force (IETF)                         E. Crabbe
Request for Comments: 8281                        Individual Contributor
Category: Standards Track                                       I. Minei
ISSN: 2070-1721                                             Google, Inc.
                                                            S. Sivabalan
                                                     Cisco Systems, Inc.
                                                                R. Varga
                                               Pantheon Technologies SRO
                                                           December 2017

 Path Computation Element Communication Protocol (PCEP) Extensions for
            PCE-Initiated LSP Setup in a Stateful PCE Model

Abstract

   The Path Computation Element Communication Protocol (PCEP) provides
   mechanisms for Path Computation Elements (PCEs) to perform path
   computations in response to Path Computation Client (PCC) requests.

   The extensions for stateful PCE provide active control of
   Multiprotocol Label Switching (MPLS) Traffic Engineering Label
   Switched Paths (TE LSPs) via PCEP, for a model where the PCC
   delegates control over one or more locally configured LSPs to the
   PCE.  This document describes the creation and deletion of
   PCE-initiated LSPs under the stateful PCE model.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   https://www.rfc-editor.org/info/rfc8281.

Crabbe, et al.               Standards Track                    [Page 1]
RFC 8281           PCE-Initiated LSPs in Stateful PCE      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

   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Crabbe, et al.               Standards Track                    [Page 2]
RFC 8281           PCE-Initiated LSPs in Stateful PCE      December 2017

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Requirements Language . . . . . . . . . . . . . . . . . .   5
   3.  Architectural Overview  . . . . . . . . . . . . . . . . . . .   5
     3.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   5
     3.2.  Operation Overview  . . . . . . . . . . . . . . . . . . .   6
   4.  Support of PCE-Initiated LSPs . . . . . . . . . . . . . . . .   7
     4.1.  STATEFUL-PCE-CAPABILITY TLV . . . . . . . . . . . . . . .   8
   5.  PCE-Initiated LSP Instantiation and Deletion  . . . . . . . .   8
     5.1.  The LSP Initiate Request  . . . . . . . . . . . . . . . .   8
     5.2.  The R Flag in the SRP Object  . . . . . . . . . . . . . .  10
     5.3.  LSP Instantiation . . . . . . . . . . . . . . . . . . . .  10
       5.3.1.  The Create Flag . . . . . . . . . . . . . . . . . . .  12
       5.3.2.  The SPEAKER-ENTITY-ID TLV . . . . . . . . . . . . . .  13
     5.4.  LSP Deletion  . . . . . . . . . . . . . . . . . . . . . .  13
   6.  LSP Delegation and Cleanup  . . . . . . . . . . . . . . . . .  14
   7.  LSP State Synchronization . . . . . . . . . . . . . . . . . .  15
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  15
     8.1.  PCEP Messages . . . . . . . . . . . . . . . . . . . . . .  15
     8.2.  LSP Object  . . . . . . . . . . . . . . . . . . . . . . .  15
     8.3.  SRP object  . . . . . . . . . . . . . . . . . . . . . . .  16
     8.4.  STATEFUL-PCE-CAPABILITY TLV . . . . . . . . . . . . . . .  16
     8.5.  PCEP-Error Object . . . . . . . . . . . . . . . . . . . .  17
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
     9.1.  Malicious PCE . . . . . . . . . . . . . . . . . . . . . .  18
     9.2.  Malicious PCC . . . . . . . . . . . . . . . . . . . . . .  18
   10. References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
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