Link-Layer Addresses Assignment Mechanism for DHCPv6
draft-bvtm-dhc-mac-assign-02

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Last updated 2018-10-20
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Dynamic Host Configuration (DHC)                                 B. Volz
Internet-Draft                                                     Cisco
Intended status: Standards Track                            T. Mrugalski
Expires: April 23, 2019                                              ISC
                                                           CJ. Bernardos
                                                                    UC3M
                                                        October 20, 2018

          Link-Layer Addresses Assignment Mechanism for DHCPv6
                      draft-bvtm-dhc-mac-assign-02

Abstract

   In certain environments, e.g. large scale virtualization deployments,
   new devices are created in an automated manner.  Such devices
   typically have their link-layer (MAC) addresses randomized.  With
   sufficient scale, the likelihood of collision is not acceptable.
   Therefore an allocation mechanism is required.  This draft proposes
   an extension to DHCPv6 that allows a scalable approach to link-layer
   address assignments.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on April 23, 2019.

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   This document is subject to BCP 78 and the IETF Trust's Legal
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   publication of this document.  Please review these documents

Volz, et al.             Expires April 23, 2019                 [Page 1]
Internet-Draft    DHCPv6 Link-Layer Address Assignment      October 2018

   carefully, as they describe your rights and restrictions with respect
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   the Trust Legal Provisions and are provided without warranty as
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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   4.  Deployment scenarios and mechanism overview . . . . . . . . .   4
     4.1.  Proxy client mode scenario  . . . . . . . . . . . . . . .   4
     4.2.  Direct client mode scenario . . . . . . . . . . . . . . .   4
     4.3.  Mechanism Overview  . . . . . . . . . . . . . . . . . . .   5
   5.  Design Assumptions  . . . . . . . . . . . . . . . . . . . . .   7
   6.  Information Encoding  . . . . . . . . . . . . . . . . . . . .   8
   7.  Requesting Addresses  . . . . . . . . . . . . . . . . . . . .   8
   8.  Renewing Addresses  . . . . . . . . . . . . . . . . . . . . .   9
   9.  Releasing Addresses . . . . . . . . . . . . . . . . . . . . .  10
   10. Option Definitions  . . . . . . . . . . . . . . . . . . . . .  10
     10.1.  Identity Association for Link-Layer Addresses Option . .  10
     10.2.  Link-Layer Addresses Option  . . . . . . . . . . . . . .  12
   11. Client Behavior . . . . . . . . . . . . . . . . . . . . . . .  14
   12. Server Behavior . . . . . . . . . . . . . . . . . . . . . . .  14
   13. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  14
   14. Security Considerations . . . . . . . . . . . . . . . . . . .  15
   15. Privacy Considerations  . . . . . . . . . . . . . . . . . . .  15
   16. References  . . . . . . . . . . . . . . . . . . . . . . . . .  15
     16.1.  Normative References . . . . . . . . . . . . . . . . . .  15
     16.2.  Informative References . . . . . . . . . . . . . . . . .  15
   Appendix A.  IEEE 802c Summary  . . . . . . . . . . . . . . . . .  16
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  18

1.  Introduction

   There are several new deployment types that deal with a large number
   of devices that need to be initialized.  One of them is a scenario
   where virtual machines (VMs) are created on a massive scale.
   Typically the new VM instances are assigned a random link-layer (MAC)
   address, but that does not scale well due to the birthday paradox.
   Another use case is IoT devices.  Typically there is no need to
   provide global uniqueness of MAC addresses for such devices.  On the
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