A YANG Data Model for Layer 3 Topologies
RFC 8346

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Last updated 2018-03-16
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Internet Engineering Task Force (IETF)                          A. Clemm
Request for Comments: 8346                                        Huawei
Category: Standards Track                                      J. Medved
ISSN: 2070-1721                                                    Cisco
                                                                R. Varga
                                               Pantheon Technologies SRO
                                                                  X. Liu
                                                                   Jabil
                                                      H. Ananthakrishnan
                                                           Packet Design
                                                              N. Bahadur
                                                       Bracket Computing
                                                              March 2018

                A YANG Data Model for Layer 3 Topologies

Abstract

   This document defines a YANG data model for Layer 3 network
   topologies.

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/rfc8346.

Clemm, et al.                Standards Track                    [Page 1]
RFC 8346            YANG Data Model for L3 Topologies         March 2018

Copyright Notice

   Copyright (c) 2018 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.

Table of Contents

   1. Introduction ....................................................3
   2. Key Words .......................................................3
   3. Definitions and Acronyms ........................................4
   4. Model Structure .................................................5
   5. Layer 3 Unicast Topology Model Overview .........................6
   6. Layer 3 Unicast Topology YANG Module ............................7
   7. Interactions with Other YANG Modules ...........................15
   8. IANA Considerations ............................................15
   9. Security Considerations ........................................16
   10. References ....................................................17
      10.1. Normative References .....................................17
      10.2. Informative References ...................................19
   Appendix A.  Companion YANG Data Model for Implementations Not
                Compliant with NMDA ..................................20
   Appendix B.  Extending the Model ..................................24
     B.1.  Example OSPF Topology .....................................24
       B.1.1.  Model Overview ........................................24
       B.1.2.  OSPF Topology YANG Module .............................26
   Appendix C.  An Example ...........................................29
   Acknowledgments ...................................................34
   Contributors ......................................................34
   Authors' Addresses ................................................35

Clemm, et al.                Standards Track                    [Page 2]
RFC 8346            YANG Data Model for L3 Topologies         March 2018

1.  Introduction

   This document introduces a YANG [RFC7950] [RFC6991] data model for
   Layer 3 (L3) network topologies, specifically Layer 3 Unicast.  The
   model allows an application to have a holistic view of the topology
   of a Layer 3 network, all contained in a single conceptual YANG
   datastore.  The data model builds on top of, and augments, the data
   model for network topologies defined in [RFC8345].

   This document also shows how the model can be further refined to
   cover different Layer 3 Unicast topology types.  For this purpose, an
   example model is introduced that covers OSPF [RFC2328].  This example
   is intended purely for illustrative purpose; we expect that a
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