Neighbor Discovery Optimization for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs)
RFC 6775
Document | Type |
RFC - Proposed Standard
(November 2012; No errata)
Updates RFC 4944
|
|
---|---|---|---|
Authors | Carsten Bormann , Zach Shelby , Samita Chakrabarti , Erik Nordmark | ||
Last updated | 2015-10-14 | ||
Replaces | draft-shelby-6lowpan-nd, draft-chakrabarti-6lowpan-ipv6-nd, draft-chakrabarti-6lowpan-ipv6-nd-simple, draft-hui-6lowpan-nd | ||
Stream | Internent Engineering Task Force (IETF) | ||
Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6775 (Proposed Standard) | |
Action Holders |
(None)
|
||
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Ralph Droms | ||
IESG note | Carsten Bormann (cabo@tzi.org) is the document shepherd. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) Z. Shelby, Ed. Request for Comments: 6775 Sensinode Updates: 4944 S. Chakrabarti Category: Standards Track Ericsson ISSN: 2070-1721 E. Nordmark Cisco Systems C. Bormann Universitaet Bremen TZI November 2012 Neighbor Discovery Optimization for IPv6 over Low-Power Wireless Personal Area Networks (6LoWPANs) Abstract The IETF work in IPv6 over Low-power Wireless Personal Area Network (6LoWPAN) defines 6LoWPANs 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 RFC 4944 to specify the use of the optimizations defined here. 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 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6775. Shelby, et al. Standards Track [Page 1] RFC 6775 ND Optimization for 6LoWPANs November 2012 Copyright Notice 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 ......................................7 1.4. Substitutable Features .....................................8 2. Terminology .....................................................9 3. Protocol Overview ..............................................11 3.1. Extensions to RFC 4861 ....................................11 3.2. Address Assignment ........................................12 3.3. Host-to-Router Interaction ................................13 3.4. Router-to-Router Interaction ..............................14 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 ........................19 4.4. Duplicate Address Messages ................................20 5. Host Behavior ..................................................22 5.1. Forbidden Actions .........................................22 5.2. Interface Initialization ..................................22 5.3. Sending a Router Solicitation .............................23 5.4. Processing a Router Advertisement .........................23 5.4.1. Address Configuration ..............................23 5.4.2. Storing Contexts ...................................24 5.4.3. Maintaining Prefix and Context Information .........24 5.5. Registration and Neighbor Unreachability Detection ........25Show full document text