DHCPv6 Extension Survey and Considerations
draft-ietf-dhc-problem-statement-of-mredhcpv6-02
Dynamic Host Configuration (DHC) G. Ren
Internet-Draft L. He
Intended status: Informational Y. Liu
Expires: July 15, 2020 Tsinghua University
January 12, 2020
DHCPv6 Extension Survey and Considerations
draft-ietf-dhc-problem-statement-of-mredhcpv6-02
Abstract
The manageability, security, privacy protection, and traceability of
networks can be supported by extending 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
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time. It is inappropriate to use Internet-Drafts as reference
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This Internet-Draft will expire on July 15, 2020.
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Internet-Draft problem statement of mredhcpv6 January 2020
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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 Points . . . . . . . . . . . . . . . . . . . . . . 5
4.1. DHCPv6 General Model . . . . . . . . . . . . . . . . . . 5
4.2. Extension Discussion . . . . . . . . . . . . . . . . . . 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. Normative References . . . . . . . . . . . . . . . . . . . . 8
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 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
effectively. The extensions to DHCPv6 can be various according to
multiple requirements. The goal of multi-requirement extensions for
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