Unique IPv6 Prefix Per Host
draft-ietf-v6ops-unique-ipv6-prefix-per-host-02

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v6ops                                                      J. Brzozowski
Internet-Draft                                             Comcast Cable
Intended status: Best Current Practice                   G. Van De Velde
Expires: September 14, 2017                                        Nokia
                                                          March 13, 2017

                      Unique IPv6 Prefix Per Host
            draft-ietf-v6ops-unique-ipv6-prefix-per-host-02

Abstract

   In some IPv6 environments the need has arisen for hosts to be able to
   utilise a unique IPv6 prefix even though the link or media may be
   shared.  Typically hosts (subscribers) on a shared network, either
   wired or wireless, such as Ethernet, WiFi, etc., will acquire unique
   IPv6 addresses from a common IPv6 prefix that is allocated or
   assigned for use on a specific link.

   In most deployments today IPv6 address assignment from a single IPv6
   prefix on a shared network is done by either using IPv6 stateless
   address auto-configuration (SLAAC) and/or stateful DHCPv6.  While
   this is still viable and operates as designed there are some large
   scale environments where this concept introduces significant
   performance challenges and implications, specifically related to IPv6
   router and neighbor discovery.

   This document outlines an approach utilising existing IPv6 protocols
   to allow hosts to be assigned a unique IPv6 prefix (instead of a
   unique IPv6 address from a shared IPv6 prefix).  Benefits of a unique
   IPv6 prefix compared to a unique IPv6 address from the service
   provider are going from improved subscriber isolation to enhanced
   subscriber management.

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."

Brzozowski & Van De VelExpires September 14, 2017               [Page 1]
Internet-Draft         Unique IPv6 Prefix Per Host            March 2017

   This Internet-Draft will expire on September 14, 2017.

Copyright Notice

   Copyright (c) 2017 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
   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.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Motivation and Scope of Applicability . . . . . . . . . . . .   3
   3.  Design Principles . . . . . . . . . . . . . . . . . . . . . .   4
   4.  IPv6 Unique Prefix Assignment . . . . . . . . . . . . . . . .   4
   5.  IPv6 Neighbourship Discovery Best Practices . . . . . . . . .   5
   6.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   7
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .   7
   8.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .   7
   9.  Normative References  . . . . . . . . . . . . . . . . . . . .   7
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   8

1.  Introduction

   The concepts in this document are originally developed as part of a
   large scale, production deployment of IPv6 support for a provider
   managed shared network service.  In this document IPv6 support does
   not preclude support for IPv4, however, the primary objectives for
   this work was to make it so that user equipment (UE) were capable of
   an IPv6 only experience from a network operators perspective.  In the
   context of this document, UE can be a 'regular' end-user-equipment,
   as well as a server in a datacentre, assuming a shared network (wired
   or wireless).

   Details of IPv4 support are out of scope for this document.  This
   document will also, in general, outline the requirements that must be
   satified by UE to allow for an IPv6 only experience.

   In most deployments today User Equipment (UE) IPv6 address assignment
   is commonly done using either IPv6 SLAAC RFC4862 [RFC4862] and/or

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