YANG Types for DNS Classes and Resource Record Types

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Last updated 2019-02-27
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DNSOP Working Group                                            L. Lhotka
Internet-Draft                                                 P. Spacek
Intended status: Standards Track                                  CZ.NIC
Expires: 31 August 2019                                 27 February 2019

          YANG Types for DNS Classes and Resource Record Types


   This document contains the initial revision of the YANG module iana-
   dns-class-rr-type that contains derived types reflecting two IANA
   registries: DNS CLASSes and Resource Record (RR) TYPEs.  These YANG
   types are intended as a minimum basis for future data modeling work.

Status of This Memo

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   This Internet-Draft will expire on 31 August 2019.

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Table of Contents

   1.  Introduction
   2.  YANG Design Considerations
   3.  YANG Module
   4.  IANA Considerations
       4.1.  URI Registrations
       4.2.  YANG Module Registrations
   5.  Security Considerations
   6.  References
       6.1.  Normative References
       6.2.  Informative References
   Authors' Addresses

1.  Introduction

   YANG [RFC7950] has become a de facto standard as a language for
   modeling configuration and state data, as well as specifying
   management operations and asynchronous notifications.  It is
   reasonable to expect that the approach based on utilizing such data
   models along with standard management protocols such as NETCONF and
   RESTCONF can be effectively used in DNS operations, too.  In fact,
   several efforts are currently underway that attempt to use NETCONF or
   RESTCONF for configuring and managing

   *  authoritative servers

   *  resolvers

   *  zone data.

   While it is possible to use the management protocols mentioned above
   with ad hoc or proprietary data models, their real potential can be
   realized only if there is a (completely or partly) unified data model
   supported by multiple DNS software implementations.  Operators can
   then, for instance, run several different DNS servers in parallel,
   and use a common configuration and management interface and data for
   all of them.  Also, it becomes considerably easier to migrate to
   another implementation.

   Based on the previous experience from the IETF Routing Area, it is to
   be expected that the development of unified data models for DNS will
   be a lengthy and complicated process that will require active
   cooperation and compromises from the vendors and developers of major
   DNS server platforms.  Nevertheless, it is likely that any DNS-
   related data modeling effort will need to use various DNS parameters
   and enumerations that are specified in several IANA registries.  For
   use with YANG, these parameters and enumerations have to be
   translated into corresponding YANG types or other structures.  Such
   translations should be straightforward and relatively

   This document is a first step in translating DNS-related IANA
   registries to YANG.  It contains the initial revision of the YANG
   module "iana-dns-class-rr-type" that defines derived types for the
   common parameters of DNS resource records (RR): class and type.
   These YANG types, "dns-class" and "rr-type", reflect the IANA
   registries "DNS CLASSes" and "Resource Record (RR) TYPEs" [IANA-DNS-

   It is worth emphasizing that the role of the DNSOP Working Group is
   only in preparing and publishing this initial revision of the YANG
   module.  Subsequently, whenever a new class or RR type is added to
   the above registries, IANA will also update the iana-dns-class-rr-
   type YANG module, following the instructions in Section 4 below.
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