Mapping of Address and Port with Encapsulation (MAP-E)
RFC 7597

Document Type RFC - Proposed Standard (July 2015; No errata)
Last updated 2015-07-30
Stream IETF
Formats plain text pdf html
Stream WG state Submitted to IESG for Publication
Consensus Yes
Document shepherd Suresh Krishnan
Shepherd write-up Show (last changed 2014-06-19)
IESG IESG state RFC 7597 (Proposed Standard)
Telechat date
Responsible AD Ted Lemon
Send notices to softwire-chairs@ietf.org, draft-ietf-softwire-map@ietf.org
IANA IANA review state Version Changed - Review Needed
IANA action state No IC
Internet Engineering Task Force (IETF)                     O. Troan, Ed.
Request for Comments: 7597                                        W. Dec
Category: Standards Track                                  Cisco Systems
ISSN: 2070-1721                                                    X. Li
                                                                  C. Bao
                                                     Tsinghua University
                                                           S. Matsushima
                                                        SoftBank Telecom
                                                             T. Murakami
                                                             IP Infusion
                                                          T. Taylor, Ed.
                                                     Huawei Technologies
                                                               July 2015

         Mapping of Address and Port with Encapsulation (MAP-E)

Abstract

   This document describes a mechanism for transporting IPv4 packets
   across an IPv6 network using IP encapsulation.  It also describes a
   generic mechanism for mapping between IPv6 addresses and IPv4
   addresses as well as transport-layer ports.

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/rfc7597.

Troan, et al.                Standards Track                    [Page 1]
RFC 7597                          MAP-E                        July 2015

Copyright Notice

   Copyright (c) 2015 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.

Troan, et al.                Standards Track                    [Page 2]
RFC 7597                          MAP-E                        July 2015

Table of Contents

   1. Introduction ....................................................4
   2. Conventions .....................................................5
   3. Terminology .....................................................5
   4. Architecture ....................................................7
   5. Mapping Algorithm ...............................................8
      5.1. Port-Mapping Algorithm ....................................10
      5.2. Basic Mapping Rule (BMR) ..................................11
      5.3. Forwarding Mapping Rule (FMR) .............................14
      5.4. Destinations outside the MAP Domain .......................14
   6. The IPv6 Interface Identifier ..................................15
   7. MAP Configuration ..............................................15
      7.1. MAP CE ....................................................15
      7.2. MAP BR ....................................................16
   8. Forwarding Considerations ......................................17
      8.1. Receiving Rules ...........................................17
      8.2. ICMP ......................................................18
      8.3. Fragmentation and Path MTU Discovery ......................18
           8.3.1. Fragmentation in the MAP Domain ....................18
           8.3.2. Receiving IPv4 Fragments on the MAP Domain
                  Borders ............................................19
           8.3.3. Sending IPv4 Fragments to the Outside ..............19
   9. NAT44 Considerations ...........................................19
   10. Security Considerations .......................................20
   11. References ....................................................21
      11.1. Normative References .....................................21
      11.2. Informative References ...................................21
   Appendix A. Examples ..............................................25
Show full document text