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An Architecture for Network Management Using NETCONF and YANG
RFC 6244

Internet Engineering Task Force (IETF)                         P. Shafer
Request for Comments: 6244                              Juniper Networks
Category: Informational                                        June 2011
ISSN: 2070-1721

     An Architecture for Network Management Using NETCONF and YANG

Abstract

   The Network Configuration Protocol (NETCONF) gives access to native
   capabilities of the devices within a network, defining methods for
   manipulating configuration databases, retrieving operational data,
   and invoking specific operations.  YANG provides the means to define
   the content carried via NETCONF, both data and operations.  Using
   both technologies, standard modules can be defined to give
   interoperability and commonality to devices, while still allowing
   devices to express their unique capabilities.

   This document describes how NETCONF and YANG help build network
   management applications that meet the needs of network operators.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6244.

Shafer                        Informational                     [Page 1]
RFC 6244                       NETMODARCH                      June 2011

Copyright Notice

   Copyright (c) 2011 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
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   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
   10, 2008.  The person(s) controlling the copyright in some of this
   material may not have granted the IETF Trust the right to allow
   modifications of such material outside the IETF Standards Process.
   Without obtaining an adequate license from the person(s) controlling
   the copyright in such materials, this document may not be modified
   outside the IETF Standards Process, and derivative works of it may
   not be created outside the IETF Standards Process, except to format
   it for publication as an RFC or to translate it into languages other
   than English.

Shafer                        Informational                     [Page 2]
RFC 6244                       NETMODARCH                      June 2011

Table of Contents

   1.  Origins of NETCONF and YANG  . . . . . . . . . . . . . . . . .  4
   2.  Elements of the Architecture . . . . . . . . . . . . . . . . .  5
     2.1.  NETCONF  . . . . . . . . . . . . . . . . . . . . . . . . .  5
       2.1.1.  NETCONF Transport Mappings . . . . . . . . . . . . . .  7
     2.2.  YANG . . . . . . . . . . . . . . . . . . . . . . . . . . .  8
       2.2.1.  Constraints  . . . . . . . . . . . . . . . . . . . . . 10
       2.2.2.  Flexibility  . . . . . . . . . . . . . . . . . . . . . 11
       2.2.3.  Extensibility Model  . . . . . . . . . . . . . . . . . 12
     2.3.  YANG Translations  . . . . . . . . . . . . . . . . . . . . 13
       2.3.1.  YIN  . . . . . . . . . . . . . . . . . . . . . . . . . 13
       2.3.2.  DSDL (RELAX NG)  . . . . . . . . . . . . . . . . . . . 14
     2.4.  YANG Types . . . . . . . . . . . . . . . . . . . . . . . . 14
     2.5.  IETF Guidelines  . . . . . . . . . . . . . . . . . . . . . 14
   3.  Working with YANG  . . . . . . . . . . . . . . . . . . . . . . 14
     3.1.  Building NETCONF- and YANG-Based Solutions . . . . . . . . 14
     3.2.  Addressing Operator Requirements . . . . . . . . . . . . . 16
     3.3.  Roles in Building Solutions  . . . . . . . . . . . . . . . 18
       3.3.1.  Modeler  . . . . . . . . . . . . . . . . . . . . . . . 19
       3.3.2.  Reviewer . . . . . . . . . . . . . . . . . . . . . . . 19
       3.3.3.  Device Developer . . . . . . . . . . . . . . . . . . . 19

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