IPv6 Neighbor Discovery on Wireless Networks
draft-thubert-6man-ipv6-over-wireless-06

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6MAN                                                     P. Thubert, Ed.
Internet-Draft                                             Cisco Systems
Intended status: Standards Track                             1 June 2020
Expires: 3 December 2020

              IPv6 Neighbor Discovery on Wireless Networks
                draft-thubert-6man-ipv6-over-wireless-06

Abstract

   This document describes how the original IPv6 Neighbor Discovery and
   Wireless ND (WiND) can be applied on various abstractions of wireless
   media.

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
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   This Internet-Draft will expire on 3 December 2020.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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   Please review these documents carefully, as they describe your rights
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Acronyms  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  ND-Classic, Wireless ND and ND-Proxies  . . . . . . . . . . .   4
   4.  IP Models . . . . . . . . . . . . . . . . . . . . . . . . . .   6
     4.1.  Physical Broadcast Domain . . . . . . . . . . . . . . . .   6
     4.2.  Link Layer Broadcast Emulations . . . . . . . . . . . . .   7
     4.3.  Mapping the IPv6 link Abstraction . . . . . . . . . . . .   9
     4.4.  Mapping the IPv6 subnet Abstraction . . . . . . . . . . .  10
   5.  Wireless Neighbor Discovery . . . . . . . . . . . . . . . . .  10
     5.1.  Introduction to Wireless ND . . . . . . . . . . . . . . .  11
     5.2.  links and Link-Local Addresses  . . . . . . . . . . . . .  12
     5.3.  subnets and Global Addresses  . . . . . . . . . . . . . .  12
   6.  WiND Applicability  . . . . . . . . . . . . . . . . . . . . .  13
     6.1.  Case of LPWANs  . . . . . . . . . . . . . . . . . . . . .  14
     6.2.  Case of Infrastructure BSS and ESS  . . . . . . . . . . .  14
     6.3.  Case of Mesh Under Technologies . . . . . . . . . . . . .  15
     6.4.  Case of DMB radios  . . . . . . . . . . . . . . . . . . .  16
       6.4.1.  Using ND-Classic only . . . . . . . . . . . . . . . .  16
       6.4.2.  Using Wireless ND . . . . . . . . . . . . . . . . . .  16
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
   9.  Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  19
   10. Normative References  . . . . . . . . . . . . . . . . . . . .  19
   11. Informative References  . . . . . . . . . . . . . . . . . . .  20
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . .  23

1.  Introduction

   [IEEE Std. 802.1] Ethernet Bridging provides an efficient and
   reliable broadcast service for wired networks; applications and
   protocols have been built that heavily depend on that feature for
   their core operation.  Unfortunately, Low-Power Lossy Networks (LLNs)
   and Wireless Local Area Networks (WLANs) generally do not benefit
   from the same reliable and cheap broadcast capabilities as Ethernet
   links.

   As opposed to unicast transmissions, the broadcast transmissions over
   wireless links are not subject to automatic retries (ARQ) and can be
   very unreliable.  Reducing the speed at the physical (PHY) layer for
   broadcast transmissions can increase the reliability, at the expense
   of a higher relative cost of broadcast on the overall available
   bandwidth.  As a result, protocols designed for bridged networks that
   rely on broadcast transmissions often exhibit disappointing
   behaviours when employed unmodified on a local wireless medium (see
   [MCAST PROBLEMS]).

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