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Network Working Group                                       N. Matsuhira
Internet-Draft                                           Fujitsu Limited
Intended status: Informational                          December 6, 2018
Expires: June 9, 2019


 Multiple Ethernet - IPv6 address mapping encapsulation - fixed prefix
                       draft-matsuhira-me6e-fp-06

Abstract

   This document specifies Multiple Ethernet - IPv6 address mapping
   encapsulation - fixed prefix (ME6E-FP) base specification.  ME6E-FP
   makes expantion ethernet network over IPv6 backbone network with
   encapsuation technoogy.  And also, E6ME-FP can stack multiple
   Ethernet networks.  ME6E-FP work on own routing domain.

Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on June 9, 2019.

Copyright Notice

   Copyright (c) 2018 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



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   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.


Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . . . 3
   2.  Basic Network Configuration . . . . . . . . . . . . . . . . . . 3
   3.  Basic Function of ME6E-FP . . . . . . . . . . . . . . . . . . . 4
     3.1.  Ethernet over IPv6 Encapsulation  . . . . . . . . . . . . . 4
     3.2.  Multiple Ethernet - IPv6 mapped address (ME6A)
           architecture  . . . . . . . . . . . . . . . . . . . . . . . 4
     3.3.  Route Advertisement . . . . . . . . . . . . . . . . . . . . 5
   4.  ME6E-FP address format  . . . . . . . . . . . . . . . . . . . . 5
     4.1.  IPv6 Global Unicast Address . . . . . . . . . . . . . . . . 6
     4.2.  16bits plane ID ME6 address . . . . . . . . . . . . . . . . 6
     4.3.  32bits plane ID ME6 address . . . . . . . . . . . . . . . . 7
     4.4.  mixture and renumbering of ME6 address  . . . . . . . . . . 7
   5.  Configuration of ME6E-FP  . . . . . . . . . . . . . . . . . . . 8
   6.  Characteristic  . . . . . . . . . . . . . . . . . . . . . . . . 8
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 8
   8.  Security Considerations . . . . . . . . . . . . . . . . . . . . 8
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . . . 8
     9.1.  Normative References  . . . . . . . . . . . . . . . . . . . 8
     9.2.  References  . . . . . . . . . . . . . . . . . . . . . . . . 9
   Author's Address  . . . . . . . . . . . . . . . . . . . . . . . . . 9





















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1.  Introduction

   This document provides Multiple Ethernet - IPv6 address mapping
   encapsulation - fixed prefix (ME6E-FP) base specification.

   ME6E-FP make many virtual ethernet network over IPv6 network with
   unicast base technology.

   ME6E-FP can use on own routing domain, i.e. can advertise routes to
   the network.


2.  Basic Network Configuration

   Figure 1 shows network configuration with ME6E-FP.  The network
   consists of three parts.  IPv6 network, Nodes (Host or Router) , and
   ME6E-FP.

   Backbone network is operated with Dual Stack or IPv6 only.  Node may
   physical node or virtual node, and have Ethernet Interface.

   ME6E-FP connects IPv6 network and nodes.  ME6E-FP connect to node
   with Ethernet (Layer2), and ME6E-FP connect to IPv6 network with IPv6
   (Layer3).

    /---------------------------------------------------\
    |                                                   |
    |                  IPv6  Network                    |
    |              (Dual stack or IPv6 only)            |
    |                                                   |
    \---------------------------------------------------/
          |                             |
      +-------+            +------------------------+
      |E6ME-FP|            |        E6ME-FP         |
      +-------+            +------------------------+
          |                    |                |
    /--------------\   /--------------\   /--------------\
    |              |   |              |   |              |
    | Node         |   | Node         |   | Node         |
    |(Host/Router) |   |(Host/Router) |   |(Host/Router) |
    |              |   |              |   |              |
    \--------------/   \--------------/   \--------------/

                                 Figure 1







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3.  Basic Function of ME6E-FP

   ME6E-FP has mainly two function.  One is encapsulate from Ethernet
   frame to IPv6 packet, and decapsulate from IPv6 packet to Ethernet
   frame.  Another is advertise route corresponding to Ethernet MAC
   address.

3.1.  Ethernet over IPv6 Encapsulation

   ME6E-FP encapsulates ethernet frame to IPv6 packet from node to IPv6
   network, and decapsulates IPv6 packet to ethernet frame from IPv6
   network to node.  Figure 2 shows encapsulation and decapsulation of
   Ethernet frame and IPv6 packet


     +--------+------------+       +----------+--------+------------+
     |Ethr Hdr|    Data    |  -->  | IPv6 Hdr |Ethr Hdr|    Data    |
     +--------+------------+       +----------+--------+------------+

     +--------+------------+       +----------+--------+------------+
     |Ethr Hdr|    Data    |  <--  | IPv6 Hdr |Ethr Hdr|    Data    |
     +--------+------------+       +----------+--------+------------+


    /-------------------\  +-------+  /-----------------------------\
    |   Node            |--|ME6E-FP|--|       IPv6 Network          |
    | (Host or Router)  |  +-------+  |  (Dual Stack or IPv6 only)  |
    \-------------------/             \-----------------------------/

                                 Figure 2

   The value of next header field of IPv6 header is TBD.  The value of
   EtherIP [RFC3378] may used, however new value for this protocol may
   assigned.

   When encapsulated IPv6 Packet size exceed path MTU , ME6E-FP fragment
   Ethernet frame, and then send them.

3.2.  Multiple Ethernet - IPv6 mapped address (ME6A) architecture

   ME6A[I-D.matsuhira-me6a] is a IPv6 address used in outer IPv6 header
   which encapsulate ethernet frame by ME6E-FP.

   Figure 3 shows ME6A architecture







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   |  80 - m - n bits      |          m bits          |      n bits    |
   +-----------------------+--------------------------+----------------+
   | ME6 address prefix    |  Multiple net plane ID   |Ethernet address|
   +-----------------------+--------------------------+----------------+

                                 Figure 3

   ME6 address consists of three parts as follows.

   ME6 address prefix

      ME6 address prefix .  This value is preconfigured to all ME6E-FP
      in the IPv6 networks.

   Multiple network plane ID

      Multiple network plane ID is an identifier of Ethernet network
      over IPv6 backbone network.  This value is preconfigured depend on
      the ME6E-FP belong which ethernet network plane.  This value is
      just like VLAN-ID of IEEE802.1Q, tag VLAN.

   Ethernet address

      Ethernet MAC address in inner Ethernet frame.  EUI-48 address or
      EUI-64 address.

   ME6 address is resolved by copying ethernet MAC address in inner
   ethernet frame, and preconfigured values, ME6 prefix and multiple
   network plane ID.

3.3.  Route Advertisement

   ME6E-FP advertises ME6 address host route to the IPv6 network.  The
   number of the route of ME6 addresses is the same as the number of MAC
   address table.

   In the IPv6 network, usual dynamic routing protocol for IPv6 can be
   used such as RIPng [RFC2080], OSPFv3 [RFC2740] and IS-IS [RFC5308] .


4.  ME6E-FP address format

   ME6E-FP can be used closely in the IPv6 network, so ME6 address does
   not be advertised outside of the IPv6 network, and IPv6 packet which
   contains ME6 address does not be forwarded outside of the backbone
   network.

   So, ME6 address format and ME6 address prefix can be decided each



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   IPv6 network.  Some example are shown as follows.  These address is
   based on EUI-48 MAC address.  EUI-64 address is the future study.

4.1.  IPv6 Global Unicast Address

   This example is based on IPv6 Global Unicast Address Format
   [RFC3587].

   Figure 4 shows IPv6 Global Unicast Address Format.


    | 3 |        45bits         |  16bits   |        64bits            |
    +---+-----------------------+-----------+--------------------------+
    |001| Global routing prefix | subnet id |  Interface ID            |
    +---+-----------------------+-----------+--------------------------+

                                 Figure 4

4.2.  16bits plane ID ME6 address

   Figure 5 shows ME6 address format with 16bits multiple network plane
   ID using part of IPv6 Global Unicast Address.


    | 3 |        45bits         |  16bits   |   16bits  |   48bits     |
    +---+-----------------------+-----------+--------------------------+
    |001| Global routing prefix | subnet id |  plane ID |EUI-48 address|
    +---+-----------------------+-----------+--------------------------+
    <---ME6 address prefix--------------->

                                 Figure 5

   Where:

   Global routing prefix

      global routing prefix

   subnet id

      indication for ME6 prefix.

   multiple network plane id

      ethernet network plane ID.






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   EUI-48 address

      EUI-48 MAC address of inner ethernet frame.

   16bits plane ID can represent 65535 ethernet network plane.

4.3.  32bits plane ID ME6 address

   Figure 6shows ME6 address format with 32bits plane ID using part of
   IPv6 Global Unicast Address.


    | 3 |        45bits         |        32bits         |   48bits     |
    +---+-----------------------+--------------------------------------+
    |001| Global routing prefix |       plane ID        |EUI-48 address|
    +---+-----------------------+--------------------------------------+
    <---ME6 address prefix----->

                                 Figure 6

   Where:

   Global routing prefix

      global routing prefix

   multiple network plane id

      ethernet network plane ID.

   EUI-48 address

      EUI-48 MAC address of inner ethernet frame

   32bits plane ID can represent about 4.3 billion ethernet network
   plane.

4.4.  mixture and renumbering of ME6 address

   If ME6 address prefix does not overlap, ME6 address can co-existing.
   And also, ME6 address prefix may renumber, that mean, small start
   with 16bits plane ID ME6 address, then renumber to 32bits plane ID
   ME6 address.

   ME6E-FP provide flexible operation for scalability of multiple
   network plane id.





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5.  Configuration of ME6E-FP

   Configuration of ME6E-FP require just three information, ME6 address
   prefix, multiple Network plane ID, and prefix length of ME6E-FP
   route.  These information could explain just only one line, "<ME6E-FP
   address prefix><multiple network plane ID>/ prefix length of ME6E-FP
   route".


6.  Characteristic

   ME6E-FP has following useful characteristics.

   o  can operate unicast routing domain

   o  TBD


7.  IANA Considerations

   This document makes no request of IANA if using EtherIP Header.

   Note to RFC Editor: this section may be removed on publication as an
   RFC.


8.  Security Considerations

   ME6E-FP use automatic tunneling technologies.  Security consideration
   related tunneling technologies are discussed in RFC2893 [RFC2893],
   RFC2267 [RFC2267], etc.


9.  References

9.1.  Normative References

   [I-D.matsuhira-me6a]
              Matsuhira, N., "Multiple Ethernet - IPv6 mapped IPv6
              address (ME6A)", December 2018.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/
              RFC2119, March 1997,
              <http://www.rfc-editor.org/info/rfc2119>.

   [RFC3587]  Hinden, R., Deering, S., and E. Nordmark, "IPv6 Global
              Unicast Address Format", RFC 3587, DOI 10.17487/RFC3587,



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              August 2003, <http://www.rfc-editor.org/info/rfc3587>.

9.2.  References

   [RFC2080]  Malkin, G. and R. Minnear, "RIPng for IPv6", RFC 2080,
              DOI 10.17487/RFC2080, January 1997,
              <http://www.rfc-editor.org/info/rfc2080>.

   [RFC2267]  Ferguson, P. and D. Senie, "Network Ingress Filtering:
              Defeating Denial of Service Attacks which employ IP Source
              Address Spoofing", RFC 2267, DOI 10.17487/RFC2267,
              January 1998, <http://www.rfc-editor.org/info/rfc2267>.

   [RFC2740]  Coltun, R., Ferguson, D., and J. Moy, "OSPF for IPv6",
              RFC 2740, DOI 10.17487/RFC2740, December 1999,
              <http://www.rfc-editor.org/info/rfc2740>.

   [RFC2893]  Gilligan, R. and E. Nordmark, "Transition Mechanisms for
              IPv6 Hosts and Routers", RFC 2893, DOI 10.17487/RFC2893,
              August 2000, <http://www.rfc-editor.org/info/rfc2893>.

   [RFC3378]  Housley, R. and S. Hollenbeck, "EtherIP: Tunneling
              Ethernet Frames in IP Datagrams", RFC 3378, DOI 10.17487/
              RFC3378, September 2002,
              <http://www.rfc-editor.org/info/rfc3378>.

   [RFC5308]  Hopps, C., "Routing IPv6 with IS-IS", RFC 5308,
              DOI 10.17487/RFC5308, October 2008,
              <http://www.rfc-editor.org/info/rfc5308>.


Author's Address

   Naoki Matsuhira
   Fujitsu Limited
   17-25, Shinkamata 1-chome, Ota-ku
   Tokyo,   144-8588
   Japan

   Phone: +81-3-3735-1111
   Fax:
   Email: matsuhira@jp.fujitsu.com









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