Conveying Vendor-Specific Information in the Path Computation Element (PCE) Communication Protocol (PCEP) extensions for stateful PCE.
draft-dhody-pce-stateful-pce-vendor-07

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PCE Working Group                                                  C. Li
Internet-Draft                                                  H. Zheng
Intended status: Standards Track                     Huawei Technologies
Expires: January 9, 2020                                    S. Sivabalan
                                                     Cisco Systems, Inc.
                                                            July 8, 2019

 Conveying Vendor-Specific Information in the Path Computation Element
    (PCE) Communication Protocol (PCEP) extensions for stateful PCE.
                 draft-dhody-pce-stateful-pce-vendor-07

Abstract

   A Stateful Path Computation Element (PCE) maintains information on
   the current network state, including: computed Label Switched Path
   (LSPs), reserved resources within the network, and pending path
   computation requests.  This information may then be considered when
   computing new traffic engineered LSPs, and for associated and
   dependent LSPs, received from Path Computation Clients (PCCs).

   RFC 7470 defines a facility to carry vendor-specific information in
   PCEP.

   This document extends this capability for the stateful PCE messages.

Status of This Memo

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Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Li, et al.               Expires January 9, 2020                [Page 1]
Internet-Draft               VENDOR-STATEFUL                   July 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Procedures for the Vendor Information Object  . . . . . . . .   3
   3.  Procedures for the Vendor Information TLV . . . . . . . . . .   5
   4.  Vendor Information Object and TLV . . . . . . . . . . . . . .   6
   5.  Manageability Considerations  . . . . . . . . . . . . . . . .   6
     5.1.  Control of Function and Policy  . . . . . . . . . . . . .   6
     5.2.  Information and Data Models . . . . . . . . . . . . . . .   6
     5.3.  Liveness Detection and Monitoring . . . . . . . . . . . .   6
     5.4.  Verify Correct Operations . . . . . . . . . . . . . . . .   6
     5.5.  Requirements On Other Protocols . . . . . . . . . . . . .   6
     5.6.  Impact On Network Operations  . . . . . . . . . . . . . .   6
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .   7
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   7
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   7
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   8
   Appendix A.  Contributor Addresses  . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   9

1.  Introduction

   The Path Computation Element communication Protocol (PCEP) [RFC5440]
   provides mechanisms for Path Computation Elements (PCEs) to perform
   path computations in response to Path Computation Clients' (PCCs)
   requests.

   A stateful PCE is capable of considering, for the purposes of path
   computation, not only the network state in terms of links and nodes
   (referred to as the Traffic Engineering Database or TED) but also the
   status of active services (previously computed paths, and currently
   reserved resources, stored in the Label Switched Paths Database (LSP-
   DB).  [RFC8051] describes general considerations for a stateful PCE
   deployment and examines its applicability and benefits, as well as
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