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Extended IPv6 Addressing for Encoding Port Range
draft-bcx-behave-address-fmt-extension-05

Document type: Active Internet-Draft (individual)
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Last updated: 2014-01-03
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behave                                                            C. Bao
Internet-Draft                                                     X. Li
Intended status: Standards Track                  CERNET Center/Tsinghua
Expires: July 8, 2014                                         University
                                                         January 4, 2014

            Extended IPv6 Addressing for Encoding Port Range
               draft-bcx-behave-address-fmt-extension-05

Abstract

   This document discusses an extension of the algorithmic translation
   between IPv4 and IPv4-translatable IPv6 addresses.  The extended
   address format contains transport-layer port set identification
   (PSID) which allows several IPv6 nodes to share a single IPv4 address
   with each node managing a different range of ports.  This address
   format extension can be used for IPv4/IPv6 translation, as well as
   IPv4 over IPv6 tunneling.

Status of this Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on July 8, 2014.

Copyright Notice

   Copyright (c) 2014 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
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Bao & Li                  Expires July 8, 2014                  [Page 1]
Internet-Draft          Extended IPv6 Addressing            January 2014

   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

   This document may contain material from IETF Documents or IETF
   Contributions published or made publicly available before November
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   Without obtaining an adequate license from the person(s) controlling
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   than English.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
     1.1.  Applicability Scope  . . . . . . . . . . . . . . . . . . .  3
     1.2.  Conventions  . . . . . . . . . . . . . . . . . . . . . . .  4
   2.  Port Mapping Algorithm . . . . . . . . . . . . . . . . . . . .  4
     2.1.  Mathematical representation of the Algorithm . . . . . . .  4
     2.2.  Bit Representation of the Algorithm  . . . . . . . . . . .  5
     2.3.  Example of the Algorithm . . . . . . . . . . . . . . . . .  5
       2.3.1.  PSID with fixed prefix length  . . . . . . . . . . . .  5
       2.3.2.  PSID with variable prefix length . . . . . . . . . . .  6
     2.4.  Features of the Algorithm  . . . . . . . . . . . . . . . .  6
   3.  Extended IPv4-translatable IPv6 Address  . . . . . . . . . . .  6
     3.1.  Address Format . . . . . . . . . . . . . . . . . . . . . .  7
     3.2.  Considerations of Using a Shorter Prefix length  . . . . .  8
     3.3.  Mapping Extended IPv4-translatable IPv6 Address to
           RFC1918 Space  . . . . . . . . . . . . . . . . . . . . . .  9
   4.  DHCP Options Extensions  . . . . . . . . . . . . . . . . . . .  9
   5.  Comparisons with MAP . . . . . . . . . . . . . . . . . . . . . 10
   6.  IANA Considerations  . . . . . . . . . . . . . . . . . . . . . 11
   7.  Security Considerations  . . . . . . . . . . . . . . . . . . . 11
   8.  Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11
   9.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     9.1.  Normative References . . . . . . . . . . . . . . . . . . . 11

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