DHCPv6 Extension Survey and Considerations
draft-ietf-dhc-problem-statement-of-mredhcpv6-04

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Dynamic Host Configuration (DHC)                                  G. Ren
Internet-Draft                                                     L. He
Intended status: Informational                                    Y. Liu
Expires: August 15, 2020                             Tsinghua University
                                                       February 12, 2020

               DHCPv6 Extension Survey and Considerations
            draft-ietf-dhc-problem-statement-of-mredhcpv6-04

Abstract

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

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
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   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 August 15, 2020.

Copyright Notice

   Copyright (c) 2020 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
   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   include Simplified BSD License text as described in Section 4.e of

Ren, et al.              Expires August 15, 2020                [Page 1]
Internet-Draft       problem statement of mredhcpv6        February 2020

   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.  Extension Discussion  . . . . . . . . . . . . . . . . . . . .   5
     4.1.  DHCPv6 General Model  . . . . . . . . . . . . . . . . . .   5
     4.2.  Extension Points  . . . . . . . . . . . . . . . . . . . .   5
       4.2.1.  Messages  . . . . . . . . . . . . . . . . . . . . . .   5
       4.2.2.  Options . . . . . . . . . . . . . . . . . . . . . . .   6
       4.2.3.  Message Processing Functions  . . . . . . . . . . . .   6
       4.2.4.  Address Generation Mechanisms . . . . . . . . . . . .   7
   5.  Extension Cases . . . . . . . . . . . . . . . . . . . . . . .   7
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .   8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   8
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .   8
     9.2.  Informative References  . . . . . . . . . . . . . . . . .   9
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  11

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 a critical network protocol that can be used to
   dynamically provide IPv6 addresses and other network configuration
   parameters to IPv6 nodes.  DHCPv6 continues to be extended and
   improved through new options, protocols, and 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
   comprehensive insight into where and how to conduct extensions in