Basic Support for IPv6 Networks Operating Outside the Context of a Basic Service Set over IEEE Std 802.11
RFC 8691

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Internet Engineering Task Force (IETF)                        N. Benamar
Request for Comments: 8691            Moulay Ismail University of Meknes
Category: Standards Track                                       J. Härri
ISSN: 2070-1721                                                  EURECOM
                                                                  J. Lee
                                                    Sangmyung University
                                                                T. Ernst
                                                                  YoGoKo
                                                           December 2019

Basic Support for IPv6 Networks Operating Outside the Context of a Basic
                    Service Set over IEEE Std 802.11

Abstract

   This document provides methods and settings for using IPv6 to
   communicate among nodes within range of one another over a single
   IEEE 802.11-OCB link.  Support for these methods and settings require
   minimal changes to existing stacks.  This document also describes
   limitations associated with using these methods.  Optimizations and
   usage of IPv6 over more complex scenarios are not covered in this
   specification and are a subject for future work.

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/rfc8691.

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.

Table of Contents

   1.  Introduction
   2.  Terminology
   3.  Communication Scenarios Where IEEE 802.11-OCB Links Are Used
   4.  IPv6 over 802.11-OCB
     4.1.  Maximum Transmission Unit (MTU)
     4.2.  Frame Format
     4.3.  Link-Local Addresses
     4.4.  Stateless Autoconfiguration
     4.5.  Address Mapping
       4.5.1.  Address Mapping -- Unicast
       4.5.2.  Address Mapping -- Multicast
     4.6.  Subnet Structure
   5.  Security Considerations
     5.1.  Privacy Considerations
       5.1.1.  Privacy Risks of Meaningful Information in Interface
               IDs
     5.2.  MAC Address and Interface ID Generation
     5.3.  Pseudonymization Impact on Confidentiality and Trust
   6.  IANA Considerations
   7.  References
     7.1.  Normative References
     7.2.  Informative References
   Appendix A.  802.11p
   Appendix B.  Aspects Introduced by OCB Mode to 802.11
   Appendix C.  Changes Needed on an 802.11a Software Driver to Become
           an 802.11-OCB Driver
   Appendix D.  Protocol Layering
   Appendix E.  Design Considerations
   Appendix F.  IEEE 802.11 Messages Transmitted in OCB Mode
   Appendix G.  Examples of Packet Formats
     G.1.  Capture in Monitor Mode
     G.2.  Capture in Normal Mode
   Appendix H.  Extra Terminology
   Appendix I.  Neighbor Discovery (ND) Potential Issues in Wireless
           Links
   Acknowledgements
   Contributors
   Authors' Addresses

1.  Introduction

   This document provides a baseline for using IPv6 to communicate among
   nodes in range of one another over a single IEEE 802.11-OCB link
   [IEEE-802.11-2016] (a.k.a., 802.11p; see Appendices A, B, and C) with
   minimal changes to existing stacks.  Moreover, the document
   identifies the limitations of such usage.  Concretely, the document
   describes the layering of IPv6 networking on top of the IEEE Std
   802.11 MAC layer or an IEEE Std 802.3 MAC layer with a frame
   translation underneath.  The resulting stack is derived from IPv6
   over Ethernet [RFC2464] but operates over 802.11-OCB to provide at
   least P2P (point-to-point) connectivity using IPv6 Neighbor Discovery
   (ND) and link-local addresses.

   The IPv6 network layer operates on 802.11-OCB in the same manner as
   operating on the Ethernet with the following exceptions:

   *  Exceptions due to the different operation of the IPv6 network
      layer on 802.11 compared to the Ethernet.  The operation of IP on
      Ethernet is described in [RFC1042] and [RFC2464].