Distributing Address Selection Policy using DHCPv6

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Document Type Active Internet-Draft (6man WG)
Last updated 2013-04-04 (latest revision 2013-01-15)
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6man Working Group                                          A. Matsumoto
Internet-Draft                                               T. Fujisaki
Intended status: Standards Track                                     NTT
Expires: July 20, 2013                                          T. Chown
                                               University of Southampton
                                                        January 16, 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.  The RFC 6724
   allowed 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
   control the address selection behavior of nodes in their site.

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Matsumoto, et al.         Expires July 20, 2013                 [Page 1]
Internet-Draft     DHCPv6 Address Selection Policy Opt      January 2013

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1.  Introduction

   RFC 3484 [RFC3484] 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

   Some problems have been identified with the default RFC 3484 address
   selection policy [RFC5220].  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-sol] and
   [I-D.ietf-6man-addr-select-considerations].  Those documents have
   helped shape the improvements in the default address selection
   algorithm [RFC6724] as well as the DHCPv6 option defined in this

1.1.  Conventions Used in This Document

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
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