Representing IPv6 Zone Identifiers in Uniform Resource Identifiers
draft-ietf-6man-uri-zoneid-01

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Last updated 2012-05-29
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6MAN                                                        B. Carpenter
Internet-Draft                                         Univ. of Auckland
Updates: 3986, 4007 (if approved)                              R. Hinden
Intended status: Standards Track                             Check Point
Expires: November 30, 2012                                  May 29, 2012

   Representing IPv6 Zone Identifiers in Uniform Resource Identifiers
                     draft-ietf-6man-uri-zoneid-01

Abstract

   This document describes how the Zone Identifier of an IPv6 scoped
   address can be represented in a Uniform Resource Identifier that
   includes a literal IPv6 address.  It updates RFC 3986 and RFC 4007.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
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   This Internet-Draft will expire on November 30, 2012.

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   Copyright (c) 2012 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Specification . . . . . . . . . . . . . . . . . . . . . . . . . 4
   3.  Web Browsers  . . . . . . . . . . . . . . . . . . . . . . . . . 5
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 6
   6.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 6
   7.  Change log [RFC Editor: Please remove]  . . . . . . . . . . . . 6
   8.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 7
     8.1.  Normative References  . . . . . . . . . . . . . . . . . . . 7
     8.2.  Informative References  . . . . . . . . . . . . . . . . . . 7
   Appendix A.  Alternatives Considered  . . . . . . . . . . . . . . . 7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . . . 9

Carpenter & Hinden      Expires November 30, 2012               [Page 2]
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1.  Introduction

   [RFC3986] defined how a literal IPv6 address can be represented in
   the "host" part of a Uniform Resource Identifier (URI).
   Subsequently, [RFC4007] extended the text representation of limited-
   scope IPv6 addresses such that a zone identifier may be concatenated
   to an address, for purposes described in that RFC.  Zone identifiers
   are especially useful in contexts where literal addresses are
   typically used, for example during fault diagnosis, when it may be
   essential to specify which interface is used for sending to a link
   local address.  It should be noted that zone identifiers have purely
   local meaning within the host where they are defined, and they are
   completely meaningless for any other host.  Today, they are only
   meaningful when attached to addresses with link local scope, but it
   is possible that other uses might be defined in the future.

   RFC 4007 does not specify how zone identifiers are to be represented
   in URIs.  Practical experience has shown that this feature is useful,
   in particular when using a web browser for debugging with link local
   addresses, but as it is undefined, it is not implemented consistently
   in URI parsers or in browsers.

   Some versions of some browsers accept the RFC 4007 syntax for scoped
   IPv6 addresses embedded in URIs, i.e., they have been coded to
   interpret the "%" sign according to RFC 4007 instead of RFC 3986.
   Clearly this approach is very convenient for users, although it
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