YANG Library
draft-ietf-netconf-rfc7895bis-02

Document Type Active Internet-Draft (netconf WG)
Last updated 2017-10-30
Replaces draft-nmdsdt-netconf-rfc7895bis
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- Yang catalog entry for ietf-yang-library@2017-10-30.yang
- Yang impact analysis for draft-ietf-netconf-rfc7895bis
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Network Working Group                                         A. Bierman
Internet-Draft                                                 YumaWorks
Obsoletes: rfc7895 (if approved)                            M. Bjorklund
Intended status: Standards Track                          Tail-f Systems
Expires: May 3, 2018                                           K. Watsen
                                                        Juniper Networks
                                                        October 30, 2017

                              YANG Library
                    draft-ietf-netconf-rfc7895bis-02

Abstract

   This document describes a YANG library that provides information
   about all the YANG modules and datastores used by a network
   management server (e.g., a Network Configuration Protocol (NETCONF)
   server).  Simple caching mechanisms are provided to allow clients to
   minimize retrieval of this information.

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
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 3, 2018.

Copyright Notice

   Copyright (c) 2017 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
   (http://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

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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
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . .   4
     1.3.  Motivation for rfc7895bis . . . . . . . . . . . . . . . .   4
     1.4.  Summary of Changes from RFC 7895  . . . . . . . . . . . .   5
   2.  YANG Library  . . . . . . . . . . . . . . . . . . . . . . . .   6
     2.1.  yang-library  . . . . . . . . . . . . . . . . . . . . . .   7
       2.1.1.  yang-library/modules/module . . . . . . . . . . . . .   7
       2.1.2.  yang-library/module-sets/module-set . . . . . . . . .   8
       2.1.3.  yang-library/datastores/datastore . . . . . . . . . .   8
     2.2.  YANG Library Module . . . . . . . . . . . . . . . . . . .   9
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  20
     3.1.  YANG Module Registry  . . . . . . . . . . . . . . . . . .  20
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  21
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  21
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  22
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  22
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  23
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  23

1.  Introduction

   There is a need for standard mechanisms to provide the operational
   state of a network management server.  This includes, for instance,
   identifying the YANG modules and datastores that are in use by a
   server and how they relate to each other.

   This document defines a YANG module that can be used to provide this
   informaton, in a way that is compatible with the NMDA
   [I-D.ietf-netmod-revised-datastores], but that is also backwards
   compatible with the "YANG Module Library" YANG module defined in
   [RFC7895].

   If a large number of YANG modules are utilized by the server, then
   the YANG library contents needed can be relatively large.  This
   information changes very infrequently, so it is important that
   clients be able to cache the YANG library contents and easily
   identify whether their cache is out of date.

   YANG library information can be different on every server and can
   change at runtime or across a server reboot.

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