A YANG Data Model for Dual-Stack Lite (DS-Lite)
RFC 8513

Document Type RFC - Proposed Standard (January 2019; No errata)
Last updated 2019-01-15
Replaces draft-boucadair-softwire-dslite-yang
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- Yang catalog entry for ietf-dslite@2018-02-26.yang
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Stream WG state Submitted to IESG for Publication
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Internet Engineering Task Force (IETF)                      M. Boucadair
Request for Comments: 8513                                  C. Jacquenet
Category: Standards Track                                         Orange
ISSN: 2070-1721                                             S. Sivakumar
                                                           Cisco Systems
                                                            January 2019

            A YANG Data Model for Dual-Stack Lite (DS-Lite)

Abstract

   This document defines a YANG module for the Dual-Stack Lite (DS-Lite)
   Address Family Transition Router (AFTR) and Basic Bridging BroadBand
   (B4) elements.

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/rfc8513.

Copyright Notice

   Copyright (c) 2019 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.

Boucadair, et al.            Standards Track                    [Page 1]
RFC 8513                   DS-Lite YANG Module              January 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  DS-Lite YANG Module: An Overview  . . . . . . . . . . . . . .   4
   3.  DS-Lite YANG Module . . . . . . . . . . . . . . . . . . . . .   7
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .  15
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  16
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .  16
     6.2.  Informative References  . . . . . . . . . . . . . . . . .  17
   Appendix A.  B4 Example . . . . . . . . . . . . . . . . . . . . .  19
   Appendix B.  AFTR Examples  . . . . . . . . . . . . . . . . . . .  19
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  21
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   This document defines a data model for DS-Lite [RFC6333], using the
   YANG data modeling language [RFC7950].  Both the Address Family
   Transition Router (AFTR) and Basic Bridging BroadBand (B4) elements
   are covered by this specification.

   Figure 1 is a slight adaptation of Figure 1 from RFC 6333 and is
   provided here for the convenience of the reader.

Boucadair, et al.            Standards Track                    [Page 2]
RFC 8513                   DS-Lite YANG Module              January 2019

                      +-----------+
                      |    Host   |
                      +-----+-----+
                            |192.0.2.1
                            |
                            |
                            |192.0.2.2
                  +---------|---------+
                  |         |         |
                  |    Home router    |
                  |+--------+--------+|
                  ||       B4        ||
                  |+--------+--------+|
                  +--------|||--------+
                           |||2001:db8:0:1::1
                           |||
                           |||<-IPv4-in-IPv6 Softwire
                           |||
                    -------|||-------
                  /        |||        \
                 |   ISP core network  |
                  \        |||        /
                    -------|||-------
                           |||
                           |||2001:db8:0:2::1
                  +--------|||--------+
                  |        AFTR       |
                  |+--------+--------+|
                  ||   Concentrator  ||
                  |+--------+--------+|
                  |       |NAT|       |
                  |       +-+-+       |
                  +---------|---------+
                            |198.51.100.1
                            |
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