Recommendation on Stable IPv6 Interface Identifiers
draft-ietf-6man-default-iids-09

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Document Type Active Internet-Draft (6man WG)
Last updated 2016-01-25
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IPv6 maintenance Working Group (6man)                            F. Gont
Internet-Draft                                    SI6 Networks / UTN-FRH
Updates: 2464, 2467, 2470,  2491, 2492,                        A. Cooper
         2497, 2590, 3146, 3315, 3572,                             Cisco
         4291, 4338, 4391, 5072, 5121                          D. Thaler
         (if approved)                                         Microsoft
Intended status: Standards Track                                  W. Liu
Expires: July 28, 2016                               Huawei Technologies
                                                        January 25, 2016

          Recommendation on Stable IPv6 Interface Identifiers
                    draft-ietf-6man-default-iids-09

Abstract

   This document changes the recommended default Interface Identifier
   generation scheme for SLAAC to that specified in RFC7217, and
   recommends against embedding link-layer addresses in IPv6 Interface
   Identifiers.  It formally updates RFC2464, RFC2467, RFC2470, RFC2491,
   RFC2492, RFC2497, RFC2590, RFC3146, RFC3572, RFC4291, RFC4338,
   RFC4391, RFC5072, and RFC5121, which require IPv6 Interface
   Identifiers to be derived from the underlying link-layer address.
   Additionally, this document provides advice about the generation of
   Interface Identifiers with Dynamic Host Configuration Protocol
   version 6 (DHCPv6) (thus updating RFC3315) and manual configuration.

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
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on July 28, 2016.

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Copyright Notice

   Copyright (c) 2016 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
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   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.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  Generation of IPv6 Interface Identifiers with SLAAC . . . . .   3
   4.  Generation of IPv6 Interface Identifiers with DHCPv6  . . . .   4
   5.  Generation of IPv6 Interface Identifiers with Manual
       Configuration . . . . . . . . . . . . . . . . . . . . . . . .   5
   6.  Update to existing RFCs . . . . . . . . . . . . . . . . . . .   5
   7.  Future Work . . . . . . . . . . . . . . . . . . . . . . . . .  17
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  18
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  18
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  21

1.  Introduction

   [RFC4862] specifies Stateless Address Autoconfiguration (SLAAC) for
   IPv6 [RFC2460], which typically results in hosts configuring one or
   more "stable" addresses composed of a network prefix advertised by a
   local router, and an Interface Identifier (IID) [RFC4291] that
   typically embeds a link-layer address (e.g., an IEEE LAN MAC
   address).

   In some network technologies and adaptation layers, the use of an IID
   based on a link-layer address may offer some advantages.  For
   example, the IP-over-IEEE802.15.4 standard in [RFC6775] allows for
   compression of IPv6 addresses when the IID is based on the underlying
   link-layer address.

   The security and privacy implications of embedding a link-layer
   address in an IPv6 IID have been known for some time now, and are

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   discussed in great detail in
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