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Internet Engineering Task Force (IETF)                          R. DromsRequest for Comments: 7973Category: Informational                                         P. DuffyISSN: 2070-1721                                                    Cisco                                                           November 2016Assignment of an Ethertype for IPv6 withLow-Power Wireless Personal Area Network (LoWPAN) EncapsulationAbstract   When carried over Layer 2 technologies such as Ethernet, IPv6   datagrams using Low-Power Wireless Personal Area Network (LoWPAN)   encapsulation as defined inRFC 4944 must be identified so the   receiver can correctly interpret the encoded IPv6 datagram.  The IETF   officially requested the assignment of an Ethertype for that purpose   and this document reports that assignment.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; seeSection 2 of RFC 7841.   Information about the current status of this document, any errata,   and how to provide feedback on it may be obtained athttp://www.rfc-editor.org/info/rfc7973.Droms & Duffy                 Informational                     [Page 1]

RFC 7973           Ethertype for LoWPAN Encapsulation      November 2016Copyright Notice   Copyright (c) 2016 IETF Trust and the persons identified as the   document authors.  All rights reserved.   This document is subject toBCP 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.Table of Contents1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .22.  Assignment of an Ethertype by IEEE  . . . . . . . . . . . . .33.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .34.  Security Considerations . . . . . . . . . . . . . . . . . . .35.  Normative References  . . . . . . . . . . . . . . . . . . . .3   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .41.  Introduction   The IETF defined "LoWPAN encapsulation", a format for IPv6 [RFC2460]   datagram encapsulation [RFC4944].  This document regards any IPv6   datagram using the Dispatch octet as defined in Section 5.1 ofRFC4944 as using LoWPAN encapsulation.  LoWPAN encapsulation as defined   inRFC 4944 has been updated by [RFC6282], and may be extended and   modified by future IETF Standards.  The intended Layer 2 technology   for IPv6 datagrams using LoWPAN encapsulation as originally defined   is [IEEE.802.15.4_2011], which does not provide for a protocol switch   in its Layer 2 headers.   The following list gives some example use cases for the Ethertype-   based protocol dispatch for the LoWPAN-encapsulated IPv6 datagram:   o  Usage of LoWPAN encapsulation in conjunction with IEEE 802.15.9      Multiplexed Data Service [IEEE802159], which provides the ability      to perform upper layer protocol dispatch for IEEE 802.15.4      networks.  Wi-SUN Alliance intends to use the 15.9 Multiplexed      Data Information Element for upper layer protocol dispatch.  As      specified in IEEE 802.15.9, dispatch of LoWPAN encapsulation      frames will require that an Ethertype be assigned for LoWPAN      encapsulation.Droms & Duffy                 Informational                     [Page 2]

RFC 7973           Ethertype for LoWPAN Encapsulation      November 2016   o  LoWPAN encapsulation will likely be needed for Wi-Fi Alliance's      HaLoW [HALOW] standard (low-power operation in the 900 MHz band).   o  Other Layer 2 technologies such as Ethernet and debugging tools      such as Wireshark require a unique Protocol Type field for LoWPAN      encapsulation to properly interpret IPv6 datagrams that use LoWPAN      encapsulation.   o  Any existing or future Layer 2 technology, incorporating      Ethertype-based upper layer dispatch, can use the Ethertype      proposed in this document to dispatch LoWPAN-encapsulated IPv6      datagrams.2.  Assignment of an Ethertype by IEEE   The IETF formally submitted a request to IEEE for assignment of an   Ethertype for IPv6 datagrams using LoWPAN encapsulation.  IEEE has   responded with the assignment of Ethertype 0xA0ED for this purpose.   The assignment has been recorded by IEEE [IEEE-ETHERTYPES].3.  IANA Considerations   The following entry has been added to the "ETHER TYPES" subregistry   of the "IEEE 802 Numbers" registry [IANA-IEEE802]:      Ethertype (decimal): 41197      Ethertype (hex): A0ED      Exp. Ethernet (decimal): -      Exp. Ethernet (octal): -      Description: LoWPAN encapsulation      References:RFC 7973 (this document)4.  Security Considerations   This document only requests assignment of an Ethertype for IPv6   datagrams using LoWPAN encapsulation.  It has no incremental   implications for security beyond those in the relevant protocols.Droms & Duffy                 Informational                     [Page 3]

RFC 7973           Ethertype for LoWPAN Encapsulation      November 20165.  Normative References   [HALOW]    Wi-Fi Alliance, "Wi-Fi HaLow",              <http://www.wi-fi.org/discover-wi-fi/wi-fi-halow>.   [IANA-IEEE802]              IANA, "IEEE 802 Numbers",              <http://www.iana.org/assignments/ieee-802-numbers>.   [IEEE-ETHERTYPES]              IEEE, "Ethertype",              <http://standards-oui.ieee.org/ethertype/eth.txt>.   [IEEE.802.15.4_2011]              IEEE, "IEEE Standard for Local and metropolitan area              networks--Part 15.4: Low-Rate Wireless Personal Area              Networks (LR-WPANs)", IEEE 802.15.4-2011,              DOI 10.1109/ieeestd.2011.6012487, September 2011,              <http://ieeexplore.ieee.org/servlet/opac?punumber=6012485>.   [IEEE802159]              IEEE, "IEEE Draft Recommended Practice for Transport of              Key Management Protocol (KMP) Datagrams",              IEEE P802.15.9/D04, May 2015,              <http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7272753>.   [RFC2460]  Deering, S. and R. Hinden, "Internet Protocol, Version 6              (IPv6) Specification",RFC 2460, DOI 10.17487/RFC2460,              December 1998, <http://www.rfc-editor.org/info/rfc2460>.   [RFC4944]  Montenegro, G., Kushalnagar, N., Hui, J., and D. Culler,              "Transmission of IPv6 Packets over IEEE 802.15.4              Networks",RFC 4944, DOI 10.17487/RFC4944, September 2007,              <http://www.rfc-editor.org/info/rfc4944>.   [RFC6282]  Hui, J., Ed. and P. Thubert, "Compression Format for IPv6              Datagrams over IEEE 802.15.4-Based Networks",RFC 6282,              DOI 10.17487/RFC6282, September 2011,              <http://www.rfc-editor.org/info/rfc6282>.Droms & Duffy                 Informational                     [Page 4]

RFC 7973           Ethertype for LoWPAN Encapsulation      November 2016Authors' Addresses   Ralph Droms   Email: rdroms.ietf@gmail.com   Paul Duffy   Cisco   1414 Massachusetts Ave.   Boxborough, Massachusetts  01719   United States of America   Phone: +1 978 204 9993   Email: paduffy@cisco.comDroms & Duffy                 Informational                     [Page 5]