Network Working Group T. Ernst
Internet-Draft YoGoKo
Intended status: Informational A. Petrescu
Expires: January 9, 2017 CEA, LIST
July 8, 2016
Transmission of IPv6 Packets over IEEE 802.11-OCB Networks
draft-ernst-its-ipv6-over-80211ocb-00.txt
Abstract
In this document the mapping of multicast IPv6 addresses to MAC
addresses of 802.11-OCB is proposed.
Status of This Memo
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Maximum Transmission Unit . . . . . . . . . . . . . . . . . . 3
4. Frame Format . . . . . . . . . . . . . . . . . . . . . . . . 3
5. Stateless Autoconfiguration . . . . . . . . . . . . . . . . . 3
6. Link-Local Addresses . . . . . . . . . . . . . . . . . . . . 3
7. Address Mapping -- Unicast . . . . . . . . . . . . . . . . . 3
8. Address Mapping -- Multicast . . . . . . . . . . . . . . . . 3
9. Security Considerations . . . . . . . . . . . . . . . . . . . 4
10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
11. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4
12. References . . . . . . . . . . . . . . . . . . . . . . . . . 4
12.1. Normative References . . . . . . . . . . . . . . . . . . 4
12.2. Informative References . . . . . . . . . . . . . . . . . 4
Appendix A. ChangeLog . . . . . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
In this document the mapping of link-scoped multicast IPv6 addresses
to MAC addresses of 802.11-OCB is proposed.
IPv6 protocols often make use of IPv6 multicast addresses in the
destination field of IPv6 headers. For example, an ICMPv6 link-
scoped Neighbor Advertisement is sent to the IPv6 address ff02::1
denoted "all-nodes" address. When transmitting these packets on
802.11-OCB links it is necessary to map the IPv6 address to a MAC
address.
The same mapping requirement applies to the link-scoped multicast
addresses of other IPv6 protocols as well. In DHCPv6, the
"All_DHCP_Servers" IPv6 multicast address ff02::1:2, and in OSPF the
"All_SPF_Routers" IPv6 multicast address ff02::5, need to be mapped
on a multicast MAC address.
Other than link-scope addressing, it may be possible to conceive
other IPv6 multicast addresses for specific use in vehicular
communication scenarios. For example, certain vehicle types (or road
infrastructure equipment) in a zone can be denoted by an IPv6
multicast address: "all-yellow-taxis-in-street", or "all-uber-cars".
This helps sending a message to these particular types of vehicles,
instead of sending to all vehicles in that same street. The
protocols SDP and LLDP could further be used in managing this as a
service.
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It may be possible to map parts of other-than-link-scope IPv6
multicast address (e.g. parts of a global-scope IPv6 multicast
address) into parts of a 802.11-OCB MAC address. This may help
certain IPv6 operations.
2. Terminology
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119].
OCB - Outside the Context of a Basic-Service Set ID (BSSID).
802.11-OCB - IEEE 802.11-2012 text flagged by "dot11OCBActivated".
This means: IEEE 802.11e for quality of service; 802.11j-2004 for
half-clocked operations; and 802.11p for operation in the 5.9 GHz
band and in mode OCB.
3. Maximum Transmission Unit
MTU is
4. Frame Format
5. Stateless Autoconfiguration
6. Link-Local Addresses
7. Address Mapping -- Unicast
8. Address Mapping -- Multicast
An IPv6 packet with a multicast destination address DST, consisting
of the sixteen octets DST[1] through DST[16], is transmitted to the
IEEE 802.11-OCB MAC multicast address whose first two octets are the
value 0x3333 and whose last four octets are the last four octets of
DST.
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|0 0 1 1 0 0 1 1|0 0 1 1 0 0 1 1|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| DST[13] | DST[14] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| DST[15] | DST[16] |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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A Group ID TBD of length 112bits may be requested from IANA; this
Group ID signifies "All 80211OCB Interfaces Address". Only the least
32 significant bits of this "All 80211OCB Interfaces Address" will be
mapped to and from a MAC multicast address.
Alternatively, instead of 0x3333 address other addresses reserved at
IEEE can be considered. The Group MAC addresses reserved at IEEE are
listed at https://standards.ieee.org/develop/regauth/grpmac/
public.html (address browsed in July 2016).
9. Security Considerations
the security section
10. IANA Considerations
The Group ID for "All 80211OCB Interfaces Address" is TBD.
11. Acknowledgements
The authors would like to acknowledge Owen DeLong, Joe Touch, Jen
Linkova, Erik Kline and participants to discussions in network
working groups.
12. References
12.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
12.2. Informative References
[ieee802.11p-2010]
"IEEE Std 802.11p(TM)-2010, IEEE Standard for Information
Technology - Telecommunications and information exchange
between systems - Local and metropolitan area networks -
Specific requirements, Part 11: Wireless LAN Medium Access
Control (MAC) and Physical Layer (PHY) Specifications,
Amendment 6: Wireless Access in Vehicular Environments;
document freely available at URL
http://standards.ieee.org/getieee802/
download/802.11p-2010.pdf retrieved on September 20th,
2013.".
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Appendix A. ChangeLog
The changes are listed in reverse chronological order, most recent
changes appearing at the top of the list.
From -00.txt to -00.txt:
o first version.
Authors' Addresses
Thierry Ernst
YoGoKo
France
Email: thierry.ernst@yogoko.fr
Alexandre Petrescu
CEA, LIST
Communicating Systems Laboratory
Gif-sur-Yvette , Ile-de-France 91190
France
Phone: +33169089223
Email: Alexandre.Petrescu@cea.fr
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