Considerations on the Application of the Level 3 Multihoming Shim Protocol for IPv6 (Shim6)
RFC 6629

Document Type RFC - Informational (June 2012; No errata)
Was draft-garcia-shim6-applicability (individual in int area)
Last updated 2013-02-12
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IESG IESG state RFC 6629 (Informational)
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Responsible AD Jari Arkko
Send notices to joe.abley@icann.org, marcelo@it.uc3m.es, alberto@it.uc3m.es, draft-garcia-shim6-applicability@ietf.org
Internet Engineering Task Force (IETF)                          J. Abley
Request for Comments: 6629                                         ICANN
Category: Informational                                       M. Bagnulo
ISSN: 2070-1721                                       A. Garcia-Martinez
                                                                    UC3M
                                                               June 2012

                Considerations on the Application of the
           Level 3 Multihoming Shim Protocol for IPv6 (Shim6)

Abstract

   This document discusses some considerations on the applicability of
   the level 3 multihoming Shim protocol for IPv6 (Shim6)
   and associated support protocols and mechanisms to provide site
   multihoming capabilities in IPv6.

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/rfc6629.

Copyright Notice

   Copyright (c) 2012 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.

Abley, et al.                 Informational                     [Page 1]
RFC 6629           Shim6 Applicability Considerations          June 2012

Table of Contents

   1. Introduction ....................................................3
   2. Deployment Scenarios ............................................4
   3. Addresses and Shim6 .............................................6
      3.1. Protocol Version (IPv4 vs. IPv6) ...........................6
      3.2. Prefix Lengths .............................................7
      3.3. Address Generation and Configuration .......................7
      3.4. Use of CGA vs. HBA .........................................7
   4. Shim6 in Multihomed Nodes .......................................8
   5. Shim6 Capabilities .............................................10
      5.1. Fault Tolerance ...........................................10
           5.1.1. Establishing Communications After an Outage ........10
           5.1.2. Short-Lived and Long-Lived Communications ..........11
      5.2. Load Balancing ............................................11
      5.3. Traffic Engineering .......................................12
   6. Application Considerations .....................................12
   7. Interaction with Other Protocols and Mechanisms ................13
      7.1. Shim6 and Mobile IPv6 .....................................13
           7.1.1. Multihomed Home Network ............................14
           7.1.2. Shim6 Between the HA and the MN ....................16
      7.2. Shim6 and SEND ............................................16
      7.3. Shim6, SCTP and MPTCP .....................................17
      7.4. Shim6 and NEMO ............................................18
      7.5. Shim6 and HIP .............................................18
      7.6. Shim6 and Firewalls .......................................19
      7.7. Shim6 and NPTv6 ...........................................20
   8. Security Considerations ........................................23
      8.1. Privacy Considerations ....................................24
   9. Contributors ...................................................24
   10. Acknowledgements ..............................................24
   11. References ....................................................25
      11.1. Normative References .....................................25
      11.2. Informative References ...................................26

Abley, et al.                 Informational                     [Page 2]
RFC 6629           Shim6 Applicability Considerations          June 2012
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