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Guidelines for Creating New DHCPv6 Options
draft-ietf-dhc-option-guidelines-17

Document type: Active Internet-Draft (dhc WG)
Document stream: IETF
Last updated: 2014-02-03 (latest revision 2014-01-07)
Intended RFC status: Best Current Practice
Other versions: plain text, xml, pdf, html

IETF State: Submitted to IESG for Publication
Consensus: Yes
Document shepherd: Bernie Volz
Shepherd Write-Up: Last changed 2013-08-12

IESG State: RFC Ed Queue
IANA Action State: No IC
RFC Editor State: RFC-EDITOR
Responsible AD: Ted Lemon
Send notices to: dhc-chairs@tools.ietf.org, draft-ietf-dhc-option-guidelines@tools.ietf.org

Dynamic Host Configuration Working Group                      D. Hankins
Internet-Draft                                                    Google
Updates: 3315 (if approved)                                 T. Mrugalski
Intended status: Best Current Practice                      M. Siodelski
Expires: July 11, 2014                                               ISC
                                                                S. Jiang
                                            Huawei Technologies Co., Ltd
                                                             S. Krishnan
                                                                Ericsson
                                                         January 7, 2014

               Guidelines for Creating New DHCPv6 Options
                  draft-ietf-dhc-option-guidelines-17

Abstract

   This document provides guidance to prospective DHCPv6 Option
   developers to help them creating option formats that are easily
   adoptable by existing DHCPv6 software.  It also provides guidelines
   for expert reviewers to evaluate new registrations.  This document
   updates RFC3315.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on July 11, 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
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of

Hankins, et al.           Expires July 11, 2014                 [Page 1]
Internet-Draft          DHCPv6 Option Guidelines            January 2014

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   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.

Table of Contents

   1.  Requirements Language . . . . . . . . . . . . . . . . . . . .   3
   2.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  When to Use DHCPv6  . . . . . . . . . . . . . . . . . . . . .   4
   4.  General Principles  . . . . . . . . . . . . . . . . . . . . .   4
   5.  Reusing Other Options Formats . . . . . . . . . . . . . . . .   5
     5.1.  Option with IPv6 addresses  . . . . . . . . . . . . . . .   6
     5.2.  Option with a single flag (boolean) . . . . . . . . . . .   7
     5.3.  Option with IPv6 prefix . . . . . . . . . . . . . . . . .   7
     5.4.  Option with 32-bit integer value  . . . . . . . . . . . .   8
     5.5.  Option with 16-bit integer value  . . . . . . . . . . . .   9
     5.6.  Option with 8-bit integer value . . . . . . . . . . . . .   9
     5.7.  Option with URI . . . . . . . . . . . . . . . . . . . . .   9
     5.8.  Option with Text String . . . . . . . . . . . . . . . . .  11
     5.9.  Option with variable length data  . . . . . . . . . . . .  12
     5.10. Option with DNS Wire Format Domain Name List  . . . . . .  12
   6.  Avoid Conditional Formatting  . . . . . . . . . . . . . . . .  13
   7.  Avoid Aliasing  . . . . . . . . . . . . . . . . . . . . . . .  13
   8.  Choosing between FQDN and address . . . . . . . . . . . . . .  14
   9.  Encapsulated options in DHCPv6  . . . . . . . . . . . . . . .  17
   10. Additional States Considered Harmful  . . . . . . . . . . . .  18
   11. Configuration changes occur at fixed times  . . . . . . . . .  19
   12. Multiple provisioning domains . . . . . . . . . . . . . . . .  20
   13. Chartering Requirements and Advice for Responsible Area
       Directors . . . . . . . . . . . . . . . . . . . . . . . . . .  20
   14. Considerations for Creating New Formats . . . . . . . . . . .  21
   15. Option Size . . . . . . . . . . . . . . . . . . . . . . . . .  22
   16. Singleton options . . . . . . . . . . . . . . . . . . . . . .  22
   17. Option Order  . . . . . . . . . . . . . . . . . . . . . . . .  23
   18. Relay Options . . . . . . . . . . . . . . . . . . . . . . . .  24

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