Problem Statement of Multi-requirement Extensions for Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
draft-ietf-dhc-problem-statement-of-mredhcpv6-00

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Last updated 2019-05-30 (latest revision 2019-05-23)
Replaces draft-ren-dhc-problem-statement-of-mredhcpv6
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Dynamic Host Configuration (DHC)                                  G. Ren
Internet-Draft                                                     L. He
Intended status: Informational                                    Y. Liu
Expires: November 24, 2019                           Tsinghua University
                                                            May 23, 2019

   Problem Statement of Multi-requirement Extensions for Dynamic Host
                Configuration Protocol for IPv6 (DHCPv6)
            draft-ietf-dhc-problem-statement-of-mredhcpv6-00

Abstract

   The manageability, security, privacy protection, and traceability of
   networks can be supported by extending DHCPv6 protocol according to
   requirements.  This document analyzes current extension practices and
   typical DHCP server software on extensions, defines a DHCP general
   model, discusses some extension points, and present extension cases.

Status of This Memo

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   This Internet-Draft will expire on November 24, 2019.

Copyright Notice

   Copyright (c) 2019 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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   (https://trustee.ietf.org/license-info) in effect on the date of
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   include Simplified BSD License text as described in Section 4.e of

Ren, et al.             Expires November 24, 2019               [Page 1]
Internet-Draft       problem statement of mredhcpv6             May 2019

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Current Extension Practices . . . . . . . . . . . . . . . . .   3
     3.1.  Standardized and Non-standardized DHCPv6 Extension Cases    3
     3.2.  Current DHCPv6 Server Software Cases  . . . . . . . . . .   4
       3.2.1.  Cisco Prime Network Registrar DHCP Server Extension
               APIs  . . . . . . . . . . . . . . . . . . . . . . . .   4
       3.2.2.  Kea DHCP Hook Mechanisms  . . . . . . . . . . . . . .   4
   4.  Problem Statement . . . . . . . . . . . . . . . . . . . . . .   5
     4.1.  DHCP General Model  . . . . . . . . . . . . . . . . . . .   5
     4.2.  Extension Discussion  . . . . . . . . . . . . . . . . . .   5
       4.2.1.  DHCP Messages . . . . . . . . . . . . . . . . . . . .   5
       4.2.2.  Options . . . . . . . . . . . . . . . . . . . . . . .   6
       4.2.3.  Message Processing Functions  . . . . . . . . . . . .   6
       4.2.4.  Address Generation Mechanisms . . . . . . . . . . . .   6
       4.2.5.  Extension Principles  . . . . . . . . . . . . . . . .   7
   5.  Extension Cases . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   8
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  10

1.  Introduction

   The IP address plays a significant role in the communication of the
   Internet.  IP address generation is also closely related to the
   manageability, security, privacy protection, and traceability of
   networks.  Dynamic Host Configuration Protocol for IPv6 (DHCPv6)
   [RFC8415] is an important network protocol that can be used to
   dynamically provide IPv6 addresses and other network configuration
   parameters to IPv6 nodes.  Actually, DHCPv6 continues to be extended
   and improved through new options, protocols or message processing
   mechanisms.

   Although DHCPv6 provides more and more comprehensive functionalities
   and DHCPv6 server software also provides extension interfaces to
   allow administrators to alter and customize the way how they handle
   and respond to DHCPv6 messages, there is still a lack of a general
   insight into where and how to conduct extensions in DHCPv6
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