datatracker.ietf.org
Sign in
Version 5.3.0, 2014-04-12
Report a bug

Routing for IPv4-Embedded IPv6 Packets
RFC 6992

Internet Engineering Task Force (IETF)                          D. Cheng
Request for Comments: 6992                           Huawei Technologies
Category: Informational                                     M. Boucadair
ISSN: 2070-1721                                           France Telecom
                                                               A. Retana
                                                           Cisco Systems
                                                               July 2013

                 Routing for IPv4-Embedded IPv6 Packets

Abstract

   This document describes a routing scenario where IPv4 packets are
   transported over an IPv6 network, based on the methods described in
   RFCs 6145 and 6052, along with a separate OSPFv3 routing table for
   IPv4-embedded IPv6 routes in the IPv6 network.

Status of This Memo

   This document is not an Internet Standards Track specification; it is
   published for informational purposes.

   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).  Not all documents
   approved by the IESG are a candidate for any level of Internet
   Standard; see 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/rfc6992.

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.

Cheng, et al.                 Informational                     [Page 1]
RFC 6992         Routing for IPv4-Embedded IPv6 Packets        July 2013

Table of Contents

   1. Introduction ....................................................2
      1.1. The Scenario ...............................................3
      1.2. Routing Solution per RFC 5565 ..............................4
      1.3. An Alternative Routing Solution with OSPFv3 ................4
      1.4. OSPFv3 Routing with a Specific Topology ....................6
   2. Requirements Language ...........................................7
   3. Provisioning ....................................................7
      3.1. Deciding on the IPv4-Embedded IPv6 Topology ................7
      3.2. Maintaining a Dedicated IPv4-Embedded IPv6 Routing Table ...7
   4. Translation of IP Packets .......................................8
      4.1. Address Translation ........................................8
   5. Advertising IPv4-Embedded IPv6 Routes ...........................9
      5.1. Advertising IPv4-Embedded IPv6 Routes through an
           IPv6 Transit Network .......................................9
           5.1.1. Routing Metrics .....................................9
           5.1.2. Forwarding Address .................................10
      5.2. Advertising IPv4 Addresses into Client Networks ...........10
   6. Aggregation on IPv4 Addresses and Prefixes .....................10
   7. Forwarding .....................................................10
   8. Backdoor Connections ...........................................11
   9. Prevention of Loops ............................................11
   10. MTU Issues ....................................................11
   11. Security Considerations .......................................12
   12. Operational Considerations ....................................13
   13. Acknowledgements ..............................................14
   14. References ....................................................14
      14.1. Normative References .....................................14
      14.2. Informative References ...................................14

1.  Introduction

   This document describes a routing scenario where IPv4 packets are
   transported over an IPv6 network, based on [RFC6145] and [RFC6052],
   along with a separate OSPFv3 routing table for IPv4-embedded IPv6
   routes in the IPv6 network.  This document does not introduce any new
   IPv6 transition mechanism.

   In this document, the following terminology is used:

   o  An IPv4-embedded IPv6 address denotes an IPv6 address that

[include full document text]