DHCP Options for the Port Control Protocol (PCP)
RFC 7291

Internet Engineering Task Force (IETF)                      M. Boucadair
Request for Comments: 7291                                France Telecom
Category: Standards Track                                       R. Penno
ISSN: 2070-1721                                                  D. Wing
                                                                   Cisco
                                                               July 2014

            DHCP Options for the Port Control Protocol (PCP)

Abstract

   This document specifies DHCP (IPv4 and IPv6) options to configure
   hosts with Port Control Protocol (PCP) server IP addresses.  The use
   of DHCPv4 or DHCPv6 depends on the PCP deployment scenarios.  The set
   of deployment scenarios to which DHCPv4 or DHCPv6 can be applied is
   outside the scope of this document.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7291.

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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   described in the Simplified BSD License.

Boucadair, et al.            Standards Track                    [Page 1]
RFC 7291                    PCP DHCP Options                   July 2014

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   3
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  DHCPv6 PCP Server Option  . . . . . . . . . . . . . . . . . .   3
     3.1.  Format  . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.2.  DHCPv6 Client Behavior  . . . . . . . . . . . . . . . . .   4
   4.  DHCPv4 PCP Option . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  Format  . . . . . . . . . . . . . . . . . . . . . . . . .   5
     4.2.  DHCPv4 Client Behavior  . . . . . . . . . . . . . . . . .   6
   5.  DHCP Server Configuration Guidelines  . . . . . . . . . . . .   6
   6.  Dual-Stack Hosts  . . . . . . . . . . . . . . . . . . . . . .   8
   7.  Hosts with Multiple Interfaces  . . . . . . . . . . . . . . .   8
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  DHCPv6 Option . . . . . . . . . . . . . . . . . . . . . .   8
     9.2.  DHCPv4 Option . . . . . . . . . . . . . . . . . . . . . .   9
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   9
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .   9
     11.1.  Normative References . . . . . . . . . . . . . . . . . .   9
     11.2.  Informative References . . . . . . . . . . . . . . . . .  10

1.  Introduction

   This document defines DHCPv4 [RFC2131] and DHCPv6 [RFC3315] options
   that can be used to configure hosts with PCP server [RFC6887] IP
   addresses.

   This specification assumes a PCP server is reachable with one or
   multiple IP addresses.  As such, a list of IP addresses can be
   returned in the DHCP PCP server option.

   This specification allows returning one or multiple lists of PCP
   server IP addresses.  This is used as a hint to guide the PCP client
   when determining whether to send PCP requests to one or multiple PCP
   servers.  Concretely, the PCP client needs an indication to decide
   whether entries need to be instantiated in all PCP servers (e.g.,
   multi-homing, multiple PCP-controlled devices providing distinct
   services, etc.) or use one IP address from the list (e.g., redundancy
   group scenario, proxy-based model, etc.).  Refer to [PCP-DEPLOYMENT]
   for a discussion on PCP deployment scenarios.

   For guidelines on how a PCP client can use multiple IP addresses and
   multiple PCP servers, see [PCP-SERVER].