Registration Extensions for IPv6 over Low-Power Wireless Personal Area Network (6LoWPAN) Neighbor Discovery
RFC 8505

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Internet Engineering Task Force (IETF)                   P. Thubert, Ed.
Request for Comments: 8505                                         Cisco
Updates: 6775                                                E. Nordmark
Category: Standards Track                                         Zededa
ISSN: 2070-1721                                           S. Chakrabarti
                                                                 Verizon
                                                              C. Perkins
                                                               Futurewei
                                                           November 2018

                 Registration Extensions for IPv6 over
 Low-Power Wireless Personal Area Network (6LoWPAN) Neighbor Discovery

Abstract

   This specification updates RFC 6775 -- the Low-Power Wireless
   Personal Area Network (6LoWPAN) Neighbor Discovery specification --
   to clarify the role of the protocol as a registration technique and
   simplify the registration operation in 6LoWPAN routers, as well as to
   provide enhancements to the registration capabilities and mobility
   detection for different network topologies, including the Routing
   Registrars performing routing for host routes and/or proxy Neighbor
   Discovery in a low-power network.

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/rfc8505.

Thubert, et al.              Standards Track                    [Page 1]
RFC 8505         Registration Extensions for 6LoWPAN ND    November 2018

Copyright Notice

   Copyright (c) 2018 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 ....................................................3
   2. Terminology .....................................................4
      2.1. Requirements Language ......................................4
      2.2. Related Documents ..........................................4
      2.3. Abbreviations ..............................................4
      2.4. New Terms ..................................................6
   3. Applicability of Address Registration Options ...................7
   4. Extended Neighbor Discovery Options and Messages ................8
      4.1. Extended Address Registration Option (EARO) ................8
      4.2. Extended Duplicate Address Message Formats ................12
      4.3. Extensions to the Capability Indication Option ............13
   5. Updating RFC 6775 ..............................................14
      5.1. Extending the Address Registration Option .................16
      5.2. Transaction ID ............................................17
           5.2.1. Comparing TID Values ...............................17
      5.3. Registration Ownership Verifier (ROVR) ....................19
      5.4. Extended Duplicate Address Messages .......................20
      5.5. Registering the Target Address ............................20
      5.6. Link-Local Addresses and Registration .....................21
      5.7. Maintaining the Registration States .......................22
   6. Backward Compatibility .........................................24
      6.1. Signaling EARO Support ....................................25
      6.2. RFC 6775-Only 6LN .........................................25
      6.3. RFC 6775-Only 6LR .........................................25
      6.4. RFC 6775-Only 6LBR ........................................26
   7. Security Considerations ........................................26
   8. Privacy Considerations .........................................28

Thubert, et al.              Standards Track                    [Page 2]
RFC 8505         Registration Extensions for 6LoWPAN ND    November 2018

   9. IANA Considerations ............................................29
      9.1. Address Registration Option Flags .........................29