A YANG Data Model for Segment Routing in IPv6 (SRv6) support in Path Computation Element Communications Protocol (PCEP)
draft-li-pce-pcep-srv6-yang-00
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PCE Working Group                                                  C. Li
Internet-Draft                                       Huawei Technologies
Intended status: Standards Track                            S. Sivabalan
Expires: September 9, 2019                           Cisco Systems, Inc.
                                                          March 08, 2019

  A YANG Data Model for Segment Routing in IPv6 (SRv6) support in Path
           Computation Element Communications Protocol (PCEP)
                     draft-li-pce-pcep-srv6-yang-00

Abstract

   This document augments a YANG data model for the management of Path
   Computation Element communications Protocol (PCEP) for communications
   between a Path Computation Client (PCC) and a Path Computation
   Element (PCE), or between two PCEs in support for Segment Routing in
   IPv6.  The data model includes configuration data and state data
   (status information and counters for the collection of statistics).

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 9, 2019.

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   Copyright (c) 2019 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
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   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   3.  Terminology and Notation  . . . . . . . . . . . . . . . . . .   3
     3.1.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Prefixes in Data Node Names . . . . . . . . . . . . . . .   4
   4.  The Design of PCEP-SRv6 Data Model  . . . . . . . . . . . . .   4
     4.1.  The Overview of PCEP SRv6 Data Model  . . . . . . . . . .   4
   5.  PCEP-SRv6 YANG Modules  . . . . . . . . . . . . . . . . . . .   5
     5.1.  ietf-pcep-srv6 module . . . . . . . . . . . . . . . . . .   5
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   9
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  10
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  10
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  10
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  12
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  13

1.  Introduction

   The Path Computation Element (PCE) defined in [RFC4655] is an entity
   that is capable of computing a network path or route based on a
   network graph, and applying computational constraints.  A Path
   Computation Client (PCC) may make requests to a PCE for paths to be
   computed.

   PCEP is the communication protocol between a PCC and PCE and is
   defined in [RFC5440].  PCEP interactions include path computation
   requests and path computation replies as well as notifications of
   specific states related to the use of a PCE in the context of
   Multiprotocol Label Switching (MPLS) and Generalized MPLS (GMPLS)
   Traffic Engineering (TE).  [RFC8231] specifies extensions to PCEP to
   enable stateful control of MPLS TE LSPs.

   [I-D.negi-pce-segment-routing-ipv6] extends
   [I-D.ietf-pce-segment-routing] to support SR for IPv6 data plane.

   [I-D.ietf-pce-pcep-yang] defines a YANG [RFC7950] data model for the
   management of PCEP speakers.  This document contains a specification
   of the PCEP-SRv6 YANG module, "ietf-pcep-srv6" which provides the
   PCEP-SRv6 [I-D.negi-pce-segment-routing-ipv6] data model.

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