v6ops WG S. Gundavelli
Internet-Draft M. Townsley
Updates: 2464 (if approved) O. Troan
Intended status: Standards Track W. Dec
Expires: April 22, 2011 Cisco
October 19, 2010
Address Mapping of IPv6 multicast packets on Ethernet
draft-gundavelli-v6ops-l2-unicast-06.txt
Abstract
When transmitting an IPv6 packet with a multicast destination
address, the IPv6 destination address is mapped to an Ethernet link-
layer multicast address. This document clarifies that a mapping of
an IPv6 packet with a multicast destination address may in some
circumstances map to an Ethernet link-layer unicast address.
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 http://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 April 22, 2011.
Copyright Notice
Copyright (c) 2010 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
(http://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
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
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1. Introduction
Transmission of IPv6 Packets over Ethernet [RFC2464] section 7,
specifies how an IPv6 packet with a multicast destination address is
mapped into an Ethernet link-layer address. This document extends
this mapping to explicitly allow for a mapping of an IPv6 packet with
a multicast destination address into an Ethernet link-layer unicast
address, when it is clear that only one address is relevant.
This mapping does not replace the mapping described in [RFC2464]
section 7. The determination of the unicast Ethernet link-layer
address and the construction of the outgoing IPv6 packet are out of
scope for this document.
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2. Conventions
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].
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3. Receiving IPv6 multicast packets
An IPv6 node receiving an IPv6 packet with a multicast destination
address and an Ethernet link-layer unicast address MUST NOT drop the
packet as a result of the use of this form of address mapping.
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4. IANA Considerations
This specification does not require any IANA actions.
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5. Security Considerations
This document does not introduce any new security vulnerabilities.
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6. Acknowledgements
The authors would like to acknowledge Bernard Aboba, Fred Baker, Wes
Beebee, Ron Bonica, Olaf Bonness, Jean-Michel Combes, Ralph Droms,
Alain Durand, Suresh Krishnan, Eric Levy-Abegnoli, Phil Roberts,
Behcet Sarikaya, Hemant Singh, Mark Smith, Dave Thaler, Pascal
Thubert, Stig Venaas and Eric Voit for their contributions and
discussions on this topic.
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7. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2464] Crawford, M., "Transmission of IPv6 Packets over Ethernet
Networks", RFC 2464, December 1998.
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Authors' Addresses
Sri Gundavelli
Cisco
170 West Tasman Drive
San Jose, CA 95134
USA
Email: sgundave@cisco.com
Mark Townsley
Cisco
L'Atlantis, 11, Rue Camille Desmoulins
ISSY LES MOULINEAUX, ILE DE FRANCE 92782
France
Email: townsley@cisco.com
Ole Troan
Cisco
Oslo,
Norway
Email: ot@cisco.com
Wojciech Dec
Cisco
Haarlerbergweg 13-19
Amsterdam, Noord-Holland 1101 CH
Netherlands
Email: wdec@cisco.com
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