A YANG Data Model for Network Topologies
RFC 8345

Document Type RFC - Proposed Standard (March 2018; No errata)
Last updated 2018-03-16
Replaces draft-clemm-i2rs-yang-network-topo
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- Yang catalog entry for ietf-network-state@2017-12-18.yang
- Yang catalog entry for ietf-network-topology-state@2017-12-18.yang
- Yang catalog entry for ietf-network-topology@2017-12-18.yang
- Yang catalog entry for ietf-network@2017-12-18.yang
- Yang impact analysis for draft-ietf-i2rs-yang-network-topo
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Stream WG state Submitted to IESG for Publication (wg milestone: Dec 2016 - Request Publication ... )
Document shepherd Susan Hares
Shepherd write-up Show (last changed 2017-11-15)
IESG IESG state RFC 8345 (Proposed Standard)
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Send notices to "Susan Hares" <shares@ndzh.com>
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Internet Engineering Task Force (IETF)                          A. Clemm
Request for Comments: 8345                                        Huawei
Category: Standards Track                                      J. Medved
ISSN: 2070-1721                                                    Cisco
                                                                R. Varga
                                               Pantheon Technologies SRO
                                                              N. Bahadur
                                                       Bracket Computing
                                                      H. Ananthakrishnan
                                                           Packet Design
                                                                  X. Liu
                                                                   Jabil
                                                              March 2018

                A YANG Data Model for Network Topologies

Abstract

   This document defines an abstract (generic, or base) YANG data model
   for network/service topologies and inventories.  The data model
   serves as a base model that is augmented with technology-specific
   details in other, more specific topology and inventory data models.

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/rfc8345.

Clemm, et al.                Standards Track                    [Page 1]
RFC 8345         YANG Data Model for Network 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.

Clemm, et al.                Standards Track                    [Page 2]
RFC 8345         YANG Data Model for Network Topologies       March 2018

Table of Contents

   1. Introduction ....................................................4
   2. Key Words .......................................................8
   3. Definitions and Abbreviations ...................................9
   4. Model Structure Details .........................................9
      4.1. Base Network Model .........................................9
      4.2. Base Network Topology Data Model ..........................12
      4.3. Extending the Data Model ..................................13
      4.4. Discussion and Selected Design Decisions ..................14
           4.4.1. Container Structure ................................14
           4.4.2. Underlay Hierarchies and Mappings ..................14
           4.4.3. Dealing with Changes in Underlay Networks ..........15
           4.4.4. Use of Groupings ...................................15
           4.4.5. Cardinality and Directionality of Links ............16
           4.4.6. Multihoming and Link Aggregation ...................16
           4.4.7. Mapping Redundancy .................................16
           4.4.8. Typing .............................................17
           4.4.9. Representing the Same Device in Multiple Networks ..17
           4.4.10. Supporting Client-Configured and
                   System-Controlled Network Topologies ..............18
           4.4.11. Identifiers of String or URI Type .................19
   5. Interactions with Other YANG Modules ...........................19
   6. YANG Modules ...................................................20
      6.1. Defining the Abstract Network: ietf-network ...............20
      6.2. Creating Abstract Network Topology:
           ietf-network-topology .....................................25
   7. IANA Considerations ............................................32
   8. Security Considerations ........................................33
   9. References .....................................................35
      9.1. Normative References ......................................35
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