IPv6 Neighbor Discovery Unicast Lookup
draft-thubert-6lo-unicast-lookup-00

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6lo                                                      P. Thubert, Ed.
Internet-Draft                                          E. Levy-Abegnoli
Updates: 8505 (if approved)                                Cisco Systems
Intended status: Standards Track                        January 25, 2019
Expires: July 29, 2019

                 IPv6 Neighbor Discovery Unicast Lookup
                  draft-thubert-6lo-unicast-lookup-00

Abstract

   This document updates RFC 8505 in order to enable unicast address
   lookup from a 6LoWPAN Border Router acting as an Address Registrar.

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   This Internet-Draft will expire on July 29, 2019.

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Thubert & Levy-Abegnoli   Expires July 29, 2019                 [Page 1]
Internet-Draft   IPv6 Neighbor Discovery Unicast Lookup     January 2019

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  BCP 14  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.2.  References  . . . . . . . . . . . . . . . . . . . . . . .   4
     2.3.  New Terms . . . . . . . . . . . . . . . . . . . . . . . .   4
     2.4.  Acronym Definitions . . . . . . . . . . . . . . . . . . .   4
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Updating RFC 8505 . . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  Extended Neighbor Discovery Options and Messages  . . . .   7
       4.1.1.  Extending the Capability Indication Option  . . . . .   8
       4.1.2.  New Code Prefix for Address Mapping Messages  . . . .   8
       4.1.3.  New ARO Status  . . . . . . . . . . . . . . . . . . .   8
     4.2.  Address Mapping Messages  . . . . . . . . . . . . . . . .   9
     4.3.  IPv6 ND-based Address Lookup  . . . . . . . . . . . . . .  10
   5.  Backward Compatibility  . . . . . . . . . . . . . . . . . . .  10
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  10
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  10
     7.1.  ICMP Codes  . . . . . . . . . . . . . . . . . . . . . . .  11
     7.2.  New ARO Status values . . . . . . . . . . . . . . . . . .  11
     7.3.  New 6LoWPAN Capability Bits . . . . . . . . . . . . . . .  12
   8.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  12
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  12
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  12
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  13
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   [RFC8505] defines the Routing Registrar and extends [RFC6775] to use
   a 6LoWPAN Border Router (6LBR) as a central service for Address
   Registration and duplicate detection amongst Routing Registrars and
   possibly individual Nodes that access it directly.

   [I-D.ietf-6lo-backbone-router] introduces the Backbone Router (6BBR)
   as a Routing Registrar that performs IPv6 ND [RFC4861] [RFC4862]
   proxy operation between IPv6 Nodes on a federating Backbone Link and
   Registering Nodes attached to a LowPower Lossy Networks (LLNs) that
   register their addresses to the 6BBR.  The federated links form a
   Multilink Subnet (MLSN).

   The 6BBRs may exchange Extended Duplicate Address Messages (EDAR and
   EDAC) [RFC8505] to register the proxied addresses on behalf of the
   Registering Nodes to the 6LBR.  The Registration Ownership Verifier
   (ROVR) field in the EDAR and EDAC messages is used to correlate
   attempts to register the same address and to detect duplications.