Multicast Considerations over IEEE 802 Wireless Media
draft-ietf-mboned-ieee802-mcast-problems-09

Document Type Active Internet-Draft (mboned WG)
Last updated 2019-10-14 (latest revision 2019-09-26)
Replaces draft-mcbride-mboned-wifi-mcast-problem-statement
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IESG note Note that this document is in the OPS area but as Warren Kumari is an author, Éric Vyncke (INT AD but also having worked on a similar document years ago) is the responsible AD.
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IANA IANA review state IANA OK - No Actions Needed
Internet Area                                                 C. Perkins
Internet-Draft
Intended status: Informational                                M. McBride
Expires: March 29, 2020                                        Futurewei
                                                              D. Stanley
                                                                     HPE
                                                               W. Kumari
                                                                  Google
                                                              JC. Zuniga
                                                                  SIGFOX
                                                      September 26, 2019

         Multicast Considerations over IEEE 802 Wireless Media
              draft-ietf-mboned-ieee802-mcast-problems-09

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 Layer-2 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 performance 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 March 29, 2020.

Perkins, et al.          Expires March 29, 2020                 [Page 1]
Internet-Draft      Multicast Over IEEE 802 Wireless      September 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
   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  . . . . . . . . . . . . . . . . . . . . . . . .   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 . . . . . . . . . . . . . . . . . .   7
       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  . . . . . . . . . . . . . . . . . . . . .   9
       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  .  11
     4.3.  Buffering to Improve Battery Life . . . . . . . . . . . .  12
     4.4.  Limiting multicast buffer hardware queue depth  . . . . .  13
     4.5.  IPv6 support in 802.11-2012 . . . . . . . . . . . . . . .  13
     4.6.  Using Unicast Instead of Multicast  . . . . . . . . . . .  14
       4.6.1.  Overview  . . . . . . . . . . . . . . . . . . . . . .  14
       4.6.2.  Layer 2 Conversion to Unicast . . . . . . . . . . . .  14
       4.6.3.  Directed Multicast Service (DMS)  . . . . . . . . . .  14
       4.6.4.  Automatic Multicast Tunneling (AMT) . . . . . . . . .  15
     4.7.  GroupCast with Retries (GCR)  . . . . . . . . . . . . . .  15
   5.  Operational optimizations . . . . . . . . . . . . . . . . . .  16
     5.1.  Mitigating Problems from Spurious Neighbor Discovery  . .  16
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