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OSPFv3 Instance ID Registry Update
RFC 6969

Internet Engineering Task Force (IETF)                         A. Retana
Request for Comments: 6969                           Cisco Systems, Inc.
Updates: 5838                                                   D. Cheng
Category: Standards Track                            Huawei Technologies
ISSN: 2070-1721                                                July 2013

                   OSPFv3 Instance ID Registry Update

Abstract

   This document modifies the "Unassigned" number space in the IANA
   "OSPFv3 Instance ID Address Family Values" registry by dividing it in
   two halves -- one half Unassigned but managed via Standards Action,
   and the other Reserved for Private Use.  It updates RFC 5838.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc6969.

Copyright Notice

   Copyright (c) 2013 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.

Retana & Cheng               Standards Track                    [Page 1]
RFC 6969           OSPFv3 Instance ID Registry Update          July 2013

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 2
   2.  OSPFv3 Instance ID Address Family Values Registry Update  . . . 3
   3.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . . . 3
   5.  Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . 3
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . . . 4
     6.2.  Informative References  . . . . . . . . . . . . . . . . . . 4

1.  Introduction

   [RFC5838] defined the "OSPFv3 Instance ID Address Family Values"
   registry for the purpose of mapping OSPFv3 Instance IDs to different
   address families.  The following table lists the value ranges that
   were allocated for [RFC5838] and Unassigned.

   +---------+---------------------------------------------+-----------+
   | Value   | Description                                 | Reference |
   +---------+---------------------------------------------+-----------+
   | 0       | IPv6 unicast AF                             | [RFC5838] |
   | 1 - 31  | Base IPv6 Unicast AF dependent on local     | [RFC5838] |
   |         | policy                                      |           |
   | 32      | Base IPv6 Multicast                         | [RFC5838] |
   | 33-63   | IPv6 Multicast AFs dependent on local       | [RFC5838] |
   |         | policy                                      |           |
   | 64      | Base IPv4 Unicast AF                        | [RFC5838] |
   | 65-95   | IPv4 Unicast AFs dependent on local policy  | [RFC5838] |
   | 96      | Base IPv4 Multicast                         | [RFC5838] |
   | 97-127  | IPv4 Multicast AFs dependent on local       | [RFC5838] |
   |         | policy                                      |           |
   | 128-255 | Unassigned                                  | [RFC5838] |
   +---------+---------------------------------------------+-----------+

   In some networks, additional OSPFv3 instances may be required to
   operationally identify specific applications.  This need requires a
   pool of Instance IDs that the operator may locally assign for that
   purpose.

   For example, [OSPF-EMBED] describes an application in which IPv4-
   embedded IPv6 addresses [RFC6052] are used to transport IPv4 packets
   over an IPv6 network.  While the IPv4-embedded IPv6 addresses do in
   fact represent IPv6 destinations, it would be operationally
   beneficial to be able to easily identify the specific application by
   having a separate space to do so.  This benefit is enabled by the

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