draft-ietf-6man-exthdr-04.txt   draft-ietf-6man-exthdr-05.txt 
6man Working Group S. Krishnan 6man Working Group S. Krishnan
Internet-Draft Ericsson Internet-Draft Ericsson
Intended status: Standards Track j h. woodyatt Intended status: Standards Track j h. woodyatt
Expires: January 12, 2012 Apple Expires: May 3, 2012 Apple
E. Kline E. Kline
Google Google
J. Hoagland J. Hoagland
Symantec Symantec
M. Bhatia M. Bhatia
Alcatel-Lucent Alcatel-Lucent
July 11, 2011 October 31, 2011
An uniform format for IPv6 extension headers An uniform format for IPv6 extension headers
draft-ietf-6man-exthdr-04 draft-ietf-6man-exthdr-05
Abstract Abstract
In IPv6, optional internet-layer information is encoded in separate In IPv6, optional internet-layer information is encoded in separate
headers that may be placed between the IPv6 header and the transport headers that may be placed between the IPv6 header and the transport
layer header. There are a small number of such extension headers layer header. There are a small number of such extension headers
currently defined. This document describes the issues that can arise currently defined. This document describes the issues that can arise
when defining new extension headers and discusses the alternative when defining new extension headers and discusses the alternative
extension mechanisms in IPv6. It also provides a format for defining extension mechanisms in IPv6. It also provides a format for defining
new IPv6 extension headers that would allow implementations to new IPv6 extension headers that would allow implementations to
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 12, 2012. This Internet-Draft will expire on May 3, 2012.
Copyright Notice Copyright Notice
Copyright (c) 2011 IETF Trust and the persons identified as the Copyright (c) 2011 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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intended for general use in the public IPv6 Internet could be intended for general use in the public IPv6 Internet could be
subverted to create an attack on IPv6 routers processing packets subverted to create an attack on IPv6 routers processing packets
containing such a header or option. Reports from the field indicate containing such a header or option. Reports from the field indicate
that some IP routers deployed within the global Internet are that some IP routers deployed within the global Internet are
configured either to ignore the presence of headers with hop-by-hop configured either to ignore the presence of headers with hop-by-hop
behaviour or to drop packets containing headers with hop-by-hop behaviour or to drop packets containing headers with hop-by-hop
behaviour. behaviour.
2. Conventions used in this document 2. Conventions used in this document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL","SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119]. document are to be interpreted as described in [RFC2119].
3. Applicability 3. Applicability
The base IPv6 standard [RFC2460] allows the use of both extension The base IPv6 standard [RFC2460] allows the use of both extension
headers and destination options in order to encode optional headers and destination options in order to encode optional
destination information in an IPv6 packet. The use of destination destination information in an IPv6 packet. The use of destination
options to encode this information, provides more flexible handling options to encode this information, provides more flexible handling
characteristics and better backward compatibility than using characteristics and better backward compatibility than using
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james woodyatt james woodyatt
Apple Inc. Apple Inc.
1 Infinite Loop 1 Infinite Loop
Cupertino, CA 95014 Cupertino, CA 95014
US US
Email: jhw@apple.com Email: jhw@apple.com
Erik Kline Erik Kline
Google Google
604 Arizona Avenue Mori Tower 26F
Santa Monica, CA 90401 Roppongi 6-10-1
US Minato ku
Tokyo 106-6126
Japan
Phone: +1 310 460 4080 Phone: +81 3-6384-9635
Email: ek@google.com Email: ek@google.com
James Hoagland James Hoagland
Symantec Corporation Symantec Corporation
350 Ellis St. 350 Ellis St.
Mountain View, CA 94043 Mountain View, CA 94043
US US
Email: Jim_Hoagland@symantec.com Email: Jim_Hoagland@symantec.com
URI: http://symantec.com/ URI: http://symantec.com/
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