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