Multicast Considerations over IEEE 802 Wireless Media
draft-ietf-mboned-ieee802-mcast-problems-05

Document Type Active Internet-Draft (mboned WG)
Last updated 2019-04-15
Replaces draft-mcbride-mboned-wifi-mcast-problem-statement
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Internet Area                                                 C. Perkins
Internet-Draft                                                M. McBride
Intended status: Informational                                 Futurewei
Expires: October 17, 2019                                     D. Stanley
                                                                     HPE
                                                               W. Kumari
                                                                  Google
                                                              JC. Zuniga
                                                                  SIGFOX
                                                          April 15, 2019

         Multicast Considerations over IEEE 802 Wireless Media
              draft-ietf-mboned-ieee802-mcast-problems-05

Abstract

   Well-known issues with multicast have prevented the deployment of
   multicast in 802.11 and other local-area wireless environments.  This
   document offers guidance on known limitations and problems with
   wireless multicast.  Also described are certain multicast enhancement
   features that have been specified by the IETF and by IEEE 802 for
   wireless media, as well as some operational choices that can be taken
   to improve the performace of the network.  Finally, some
   recommendations are provided about the usage and combination of these
   features and operational choices.

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 https://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 October 17, 2019.

Perkins, et al.         Expires October 17, 2019                [Page 1]
Internet-Draft      Multicast Over IEEE 802 Wireless          April 2019

Copyright Notice

   Copyright (c) 2019 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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Identified multicast issues . . . . . . . . . . . . . . . . .   5
     3.1.  Issues at Layer 2 and Below . . . . . . . . . . . . . . .   5
       3.1.1.  Multicast reliability . . . . . . . . . . . . . . . .   5
       3.1.2.  Lower and Variable Data Rate  . . . . . . . . . . . .   6
       3.1.3.  High Interference . . . . . . . . . . . . . . . . . .   6
       3.1.4.  Power-save Effects on Multicast . . . . . . . . . . .   7
     3.2.  Issues at Layer 3 and Above . . . . . . . . . . . . . . .   7
       3.2.1.  IPv4 issues . . . . . . . . . . . . . . . . . . . . .   8
       3.2.2.  IPv6 issues . . . . . . . . . . . . . . . . . . . . .   8
       3.2.3.  MLD issues  . . . . . . . . . . . . . . . . . . . . .   8
       3.2.4.  Spurious Neighbor Discovery . . . . . . . . . . . . .   9
   4.  Multicast protocol optimizations  . . . . . . . . . . . . . .  10
     4.1.  Proxy ARP in 802.11-2012  . . . . . . . . . . . . . . . .  10
     4.2.  IPv6 Address Registration and Proxy Neighbor Discovery  .  10
     4.3.  Buffering to Improve Battery Life . . . . . . . . . . . .  12
     4.4.  IPv6 support in 802.11-2012 . . . . . . . . . . . . . . .  12
     4.5.  Using Unicast Instead of Multicast  . . . . . . . . . . .  13
       4.5.1.  Overview  . . . . . . . . . . . . . . . . . . . . . .  13
       4.5.2.  Layer 2 Conversion to Unicast . . . . . . . . . . . .  13
       4.5.3.  Directed Multicast Service (DMS)  . . . . . . . . . .  13
       4.5.4.  Automatic Multicast Tunneling (AMT) . . . . . . . . .  14
     4.6.  GroupCast with Retries (GCR)  . . . . . . . . . . . . . .  14
   5.  Operational optimizations . . . . . . . . . . . . . . . . . .  15
     5.1.  Mitigating Problems from Spurious Neighbor Discovery  . .  15
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