Distributing Address Selection Policy using DHCPv6

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Document Type Active Internet-Draft (6man WG)
Last updated 2013-08-29 (latest revision 2013-08-07)
Replaces draft-fujisaki-6man-addr-select-opt
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6man Working Group                                          A. Matsumoto
Internet-Draft                                               T. Fujisaki
Intended status: Standards Track                                     NTT
Expires: February 08, 2014                                      T. Chown
                                               University of Southampton
                                                         August 07, 2013

           Distributing Address Selection Policy using DHCPv6


   RFC 6724 defines default address selection mechanisms for IPv6 that
   allow nodes to select an appropriate address when faced with multiple
   source and/or destination addresses to choose between.  RFC 6724
   allows for the future definition of methods to administratively
   configure the address selection policy information.  This document
   defines a new DHCPv6 option for such configuration, allowing a site
   administrator to distribute address selection policy overriding the
   default address selection parameters and policy table, and thus to
   control the address selection behavior of nodes in their site.

Status of This Memo

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Internet-Draft     DHCPv6 Address Selection Policy Opt       August 2013

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1.  Introduction

   [RFC6724] describes default algorithms for selecting an address when
   a node has multiple destination and/or source addresses to choose
   from by using an address selection policy.  In Section 2 of RFC 6724,
   it is suggested that the default policy table may be administratively
   configured to suit the specific needs of a site.  This specification
   defines a new DHCPv6 option for such configuration.

   Some problems were identified with the default address selection
   policy as originally defined in [RFC3484].  As a result, RFC 3484 was
   updated and obsoleted by [RFC6724].  While this update corrected a
   number of issues identifed from operational experience, it is
   unlikely that any default policy will suit all scenarios, and thus
   mechanisms to control the source address selection policy will be
   necessary.  Requirements for those mechanisms are described in
   [RFC5221], while solutions are discussed in
   [I-D.ietf-6man-addr-select-considerations].  Those documents have
   helped shape the improvements in the default address selection
   algorithm in [RFC6724] as well as the requirements for the DHCPv6
   option defined in this specification.

1.1.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   document are to be interpreted as described in [RFC2119].

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