Neighbor Discovery Optimization for Low Power and Lossy Networks (6LoWPAN)
draft-ietf-6lowpan-nd-19

The information below is for an old version of the document
Document Type Active Internet-Draft (6lowpan WG)
Last updated 2012-07-16
Replaces draft-shelby-6lowpan-nd, draft-chakrabarti-6lowpan-ipv6-nd, draft-chakrabarti-6lowpan-ipv6-nd-simple, draft-hui-6lowpan-nd
Stream IETF
Intended RFC status Proposed Standard
Formats pdf htmlized bibtex
Reviews
Stream WG state WG Document
Document shepherd None
IESG IESG state IESG Evaluation::AD Followup
Consensus Boilerplate Unknown
Telechat date
Needs a YES. Needs 10 more YES or NO OBJECTION positions to pass.
Responsible AD Ralph Droms
IESG note Carsten Bormann (cabo@tzi.org) is the document shepherd.
Send notices to 6lowpan-chairs@tools.ietf.org, draft-ietf-6lowpan-nd@tools.ietf.org
6LoWPAN Working Group                                     Z. Shelby, Ed.
Internet-Draft                                                 Sensinode
Updates: 4944 (if approved)                               S. Chakrabarti
Intended status: Standards Track                                Ericsson
Expires: January 17, 2013                                    E. Nordmark
                                                           Cisco Systems
                                                           July 16, 2012

    Neighbor Discovery Optimization for Low Power and Lossy Networks
                               (6LoWPAN)
                        draft-ietf-6lowpan-nd-19

Abstract

   The IETF 6LoWPAN work defines IPv6 over Low-power Wireless Personal
   Area Networks such as IEEE 802.15.4.  This and other similar link
   technologies have limited or no usage of multicast signaling due to
   energy conservation.  In addition, the wireless network may not
   strictly follow the traditional concept of IP subnets and IP links.
   IPv6 Neighbor Discovery was not designed for non-transitive wireless
   links, as its reliance on the traditional IPv6 link concept and its
   heavy use of multicast make it inefficient and sometimes impractical
   in a low-power and lossy network.  This document describes simple
   optimizations to IPv6 Neighbor Discovery, its addressing mechanisms
   and duplicate address detection for Low-power Wireless Personal Area
   Networks and similar networks.  The document thus updates [RFC4944]
   to specify the use of the optimizations defined here.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 17, 2013.

Copyright Notice

Shelby, et al.          Expires January 17, 2013                [Page 1]
Internet-Draft         ND Optimization for 6LoWPAN             July 2012

   Copyright (c) 2012 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
   (http://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 . . . . . . . . . . . . . . . . . . . . . . . . .  4
     1.1.  The Shortcomings of IPv6 Neighbor Discovery  . . . . . . .  5
     1.2.  Applicability  . . . . . . . . . . . . . . . . . . . . . .  6
     1.3.  Goals and Assumptions  . . . . . . . . . . . . . . . . . .  6
     1.4.  Substitutable Features . . . . . . . . . . . . . . . . . .  8
   2.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  9
   3.  Protocol Overview  . . . . . . . . . . . . . . . . . . . . . . 10
     3.1.  Extensions to RFC4861  . . . . . . . . . . . . . . . . . . 11
     3.2.  Address Assignment . . . . . . . . . . . . . . . . . . . . 12
     3.3.  Host-to-Router Interaction . . . . . . . . . . . . . . . . 12
     3.4.  Router-to-Router Interaction . . . . . . . . . . . . . . . 13
     3.5.  Neighbor Cache Management  . . . . . . . . . . . . . . . . 14
   4.  New Neighbor Discovery Options and Messages  . . . . . . . . . 15
     4.1.  Address Registration Option  . . . . . . . . . . . . . . . 15
     4.2.  6LoWPAN Context Option . . . . . . . . . . . . . . . . . . 17
     4.3.  Authoritative Border Router Option . . . . . . . . . . . . 18
     4.4.  Duplicate Address messages . . . . . . . . . . . . . . . . 20
   5.  Host Behavior  . . . . . . . . . . . . . . . . . . . . . . . . 21
     5.1.  Forbidden Actions  . . . . . . . . . . . . . . . . . . . . 21
     5.2.  Interface Initialization . . . . . . . . . . . . . . . . . 21
     5.3.  Sending a Router Solicitation  . . . . . . . . . . . . . . 22
     5.4.  Processing a Router Advertisement  . . . . . . . . . . . . 22
       5.4.1.  Address configuration  . . . . . . . . . . . . . . . . 23
       5.4.2.  Storing Contexts . . . . . . . . . . . . . . . . . . . 23
       5.4.3.  Maintaining Prefix and Context Information . . . . . . 23
Show full document text