Recommendation on Stable IPv6 Interface Identifiers
draft-ietf-6man-default-iids-13

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Last updated 2016-07-08
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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: January 9, 2017                             Huawei Technologies
                                                            July 8, 2016

          Recommendation on Stable IPv6 Interface Identifiers
                    draft-ietf-6man-default-iids-13

Abstract

   This document changes the recommended default IID generation scheme
   for cases where SLAAC is used to generate a stable IPv6 address.  It
   recommends using the mechanism specified in RFC7217 in such cases,
   and recommends against embedding stable 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, by removing the text
   in these RFCs that required the IPv6 Interface Identifiers to be
   derived from the underlying stable link-layer address, and replacing
   this text with recommendations consistent with those in this
   document.  Additionally, this document updates RFC3315 by specifying
   additional requirements on the generation of Interface Identifiers
   used in Dynamic Host Configuration Protocol version 6 (DHCPv6).  It
   also provides advice to system administrators who employ manual
   configuration.  This document does not change any existing
   recommendations concerning the use of temporary addresses as
   specified in RFC 4941.

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."

Gont, et al.             Expires January 9, 2017                [Page 1]
Internet-Draft            Default Interface-IDs                July 2016

   This Internet-Draft will expire on January 9, 2017.

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
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   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Generation of IPv6 Interface Identifiers with SLAAC . . . . .   4
   4.  Generation of IPv6 Interface Identifiers with DHCPv6  . . . .   5
   5.  Generation of IPv6 Interface Identifiers with Manual
       Configuration . . . . . . . . . . . . . . . . . . . . . . . .   5
   6.  Update to existing RFCs . . . . . . . . . . . . . . . . . . .   5
   7.  Future Work . . . . . . . . . . . . . . . . . . . . . . . . .  18
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  18
   9.  Security Considerations . . . . . . . . . . . . . . . . . . .  19
   10. Acknowledgements  . . . . . . . . . . . . . . . . . . . . . .  19
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  19
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  22

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 stable 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
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