YANG Data Model for Segment Routing
draft-ietf-spring-sr-yang-19

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Replaces draft-litkowski-spring-sr-yang
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SPRING Working Group                                        S. Litkowski
Internet-Draft                                             Cisco Systems
Intended status: Standards Track                                   Y. Qu
Expires: February 3, 2021                                      Futurewei
                                                               A. Lindem
                                                           Cisco Systems
                                                               P. Sarkar
                                                              Individual
                                                             J. Tantsura
                                                                  Apstra
                                                          August 2, 2020

                  YANG Data Model for Segment Routing
                      draft-ietf-spring-sr-yang-19

Abstract

   This document defines a YANG data model for segment routing
   configuration and operation, which is to be augmented by different
   segment routing data planes.  The document also defines a YANG model
   that is intended to be used on network elements to configure or
   operate segment routing MPLS data plane, as well as some generic
   containers to be reused by IGP protocol modules to support segment
   routing.

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
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   This Internet-Draft will expire on February 3, 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Litkowski, et al.       Expires February 3, 2021                [Page 1]
Internet-Draft                 sr-yang-cfg                   August 2020

   This document is subject to BCP 78 and the IETF Trust's Legal
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   (https://trustee.ietf.org/license-info) in effect on the date of
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology and Notation  . . . . . . . . . . . . . . . . . .   3
     2.1.  Tree diagram  . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  Prefixes in Data Node Names . . . . . . . . . . . . . . .   3
   3.  Design of the Data Model  . . . . . . . . . . . . . . . . . .   3
   4.  Configuration . . . . . . . . . . . . . . . . . . . . . . . .   6
   5.  IGP Control plane configuration . . . . . . . . . . . . . . .   6
     5.1.  IGP interface configuration . . . . . . . . . . . . . . .   7
       5.1.1.  Adjacency SID properties  . . . . . . . . . . . . . .   7
         5.1.1.1.  Bundling  . . . . . . . . . . . . . . . . . . . .   7
         5.1.1.2.  Protection  . . . . . . . . . . . . . . . . . . .   8
   6.  States  . . . . . . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Notifications . . . . . . . . . . . . . . . . . . . . . . . .   8
   8.  YANG Module . . . . . . . . . . . . . . . . . . . . . . . . .   8
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  27
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  28
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  28
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  29
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  29
     12.2.  Informative References . . . . . . . . . . . . . . . . .  31
   Appendix A.  Configuration example  . . . . . . . . . . . . . . .  31
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  33

1.  Introduction

   This document defines a YANG data model [RFC7950] for segment routing
   [RFC8402] configuration and operation.  The document also defines a
   YANG model that is intended to be used on network elements to
   configure or operate segment routing MPLS data plane [RFC8660] This
   document does not define the IGP extensions to support segment
   routing but defines generic groupings that SHOULD be reused by IGP
   extension modules.  The reason of this design choice is to not
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