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1、IEEE Std 802aTM-2003 (Amendment to IEEE Std 802-2001) 802a“ IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture Amendment I: Ethertypes for Prototype and Vendor-Specific Protocol Development IEEE Computer Society Sponsored by the LAN/MAN Standards Committee Published by
2、 The Institute of Electrical and Electronics Engineers, Inc. 3 Park Avenue, New York, NY 10016-5997, USA 18 September 2003 Print: SH95131 PDF: SS95131 Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=
3、Wing, Bernie Not for Resale, 10/17/2007 03:37:42 MDTNo reproduction or networking permitted without license from IHS -,-,- IEEE Std 802a“-2003 (Amendment to IEEE Std 802“-2001) IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture Amendment I : Ethertypes for P rotoy pe a
4、n d Ven d or-S pecif i c Protocol Development Sponsor LANIMAN Standards Committee of the IEEE Computer Society Approved 12 June 2003 IEEE-SA Standards Board Abstract: IEEE Std 802-2001, IEEE Local and Metropolitan Area Networks: Overview and Architecture, provides an overview to the family of IEEE 8
5、02 Standards. This amendment to IEEE Std 802 identifies a set of Ethertypes that may be used for prototype and vendor specific use, and defines how the ethertypes should be used. Keywords: Ethertype protocol development, Local Area Networks (LANs), LAN/MAN architecture, LAN/MAN reference model, Metr
6、opolitan Area Networks (MANS), protocol identifier, protocol type The Institute of Electrical and Electronics Engineers, Inc 3 Park Avenue, New York, NY 10016-5997, USA Copyright O 2003 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Published 18 September 2003. P
7、rinted in the United States of America IEEE and 802 are registered trademarks in the U.S. Patent +1 978 750 8400. Permission to photocopy portions of any individual standard for educational classroom use can also be obtained through the Copyright Clearance Center. Copyright The Institute of Electric
8、al and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 03:37:42 MDTNo reproduction or networking permitted without license from IHS -,-,- In trod uct ion (This introduction is not part of IEEE Std 802a
9、-2003, IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture- Amendment 1 : Ethertypes for Prototype and Vendor-Specific Protocol Development). IEEE Std 802a-2003 IEEE Std 802-2001 provides an overview to the family of IEEE 802 Standards, describes the relationship of the
10、 IEEE 802 Standards to the Open Systems Interconnection Basic Reference Model ISO/IEC 7498-1: 19941 and explains the relationship of these standards to higher layer protocols, provides a standard for the structure of LAN MAC addresses, and provides a standard for the identification of public, privat
11、e, and standard protocols. This Amendment to IEEE Std 802-200 1 provides a means whereby prototype protocols and vendor-specific protocols may be developed and implemented without the need to register a distinct Ethertype value. Participants When the IEEE 802a Working Group approved this standard, i
12、t had the following membership: Tony Jeffree, Chair and Editor Neil Jarvis, Vice Chair Les Bell Paul Congdon Hesham Elbakoury Norm W. Finn Robert W. Hott Ran Ish-Shalom Neil Jarvis Tony Jeffree Shyam Kaluve Hal Keen Loren Larsen Frank Reichstein Mick Seaman Curtis Simonson Pat Thaler Geoffrey O. Tho
13、mpson Michel Thorsen Michael D. Wright The following members of the balloting committee voted on this standard. Balloters may have voted for approval, disapproval, or abstention. Keith Chow John Fendnch Robert Gagliano Chris Guy Raj Jain Neil Jarvis Tony Jeffree William Lane David Law Randolph Littl
14、e Gregory Lun Roger Marks Richard McBride David Millman Robert Mortonson Paul Nikolich Bob OHara Roger Pandanda Vikram Punj Floyd Ross Pat Thaler Geoffrey O. Thompson Ed Turner Don Wright Oren Yuen Copyright O 2003 IEEE. All rights reserved. . 111 Copyright The Institute of Electrical and Electronic
15、s Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 03:37:42 MDTNo reproduction or networking permitted without license from IHS -,-,- When the IEEE-SA Standards Board approved this standard on 12 June 2003, it had
16、the following membership: Don Wright, Chair Howard M. Frazier, Vice Chair Judith Gorman, Secretary H. Stephen Berger Joe Bruder Bob Davis Richard DeBlasio Julian Forster* Toshio Fukuda Arnold M. Greenspan Raymond Hapeman Donald M. Heirman Laura Hitchcock Richard H. Hulett Anant Jain Lowell G. Johnso
17、n Joseph L. Koepfinger* Tom McGean Steve Mills *Member Emeritus Also included are the following nonvoting IEEE-SA Standards Board liaisons: Alan Cookson, NIST Representative Satish K. Aggarwal, NRC Representative Michelle Turner IEEE Standards Project Editor Daleep C. Mohla William J. Moylan Paul Ni
18、kolich Gary Robinson Malcolm V. Thaden Geoffrey O. Thompson Doug Topping Howard L. Wolfman iv Copyright O 2003 IEEE. All rights reserved. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Wing, Bernie
19、Not for Resale, 10/17/2007 03:37:42 MDTNo reproduction or networking permitted without license from IHS -,-,- CONTENTS 1 . Scope 2 1.1 General . 2 2 . Ethertypes for prototype and vendor-specific protocol development 2 2.1 Introduction 2 2.2 Local Experimental Ethertypes 2 2.3 OUI Extended Ethertype
20、 4 2.4 Ethertype values for local and vendor-specific use . 5 Copyright O 2003 IEEE . All rights reserved . V Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 0
21、3:37:42 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 03:37:42 MDTNo reproduction o
22、r networking permitted without license from IHS -,-,- IEEE Standard for Local and Metropolitan Area Networks: Overview and Architecture Amendment I : Ethertypes for Prototype and Vendor4 pecific Protocol Development This amendment to IEEE Std 802-2001 defines the changes necessary in order to provid
23、e a mechanism for malting a number of Ethertype values available for use in prototype and vendor-specific protocol development. These changes are defined as a series of additions to, and modifications of, the existing text of IEEE S td 802-200 1 ; this amendment therefore assumes all material, inclu
24、ding references, abbreviations, definitions, procedures, services and protocols defined in the base text. NOTE- The editing instructions contained in this amendment define how to merge the material contained herein into the existing base standard to form the comprehensive standard The editing instru
25、ctions are shown in bold italics. Four editing instructions are used: change, delete, insert, and replace. Change is used to malte small corrections to existing text or tables. The editing instruction remove old material) or underscore (to add new material). Delete removes existing material. Insert
26、adds new material without disturbing the existing material. Insertions may require renumbering. If so, renumbering instructions are given in the editing instruction. Replace is used to malte large changes in existing text, subclauses, tables, or figures by removing existing material and replacing it
27、 with new material. Editorial notes will not be carried over into future editions of IEEE Std 802-2001. specifies the location of the change and describes what is being changed either by using tr;-thwy it provides a standard for the structure of LAN MAC addresses; and it provides a standard for iden
28、tification of public, private, prototme. and standard protocols. Keywords: IEEE 802 LAN/MAN reference model, Metropolitan Area Networks (MANS), Protocol development. Ethertypes. nf TEEE Q3 “ I IYYY “I -escribes the relationship of the IEEE 802 Standards to the Open Systems , Local Area Networks (LAN
29、s), LAN/MAN architecture, Copyright O 2003 IEEE. All rights reserved. 1 Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 10/17/2007 03:37:42 MDTNo reproduction or networki
30、ng permitted without license from IHS -,-,- IEEE Std 802a-2003 LOCAL AND METROPOLITAN AREA NETWORK: 1. Scope 1.1 General Change the text o f subclause 1.1 as shown below: This document serves as the foundation for the family of IEEE 802 Standards published by IEEE for Local Area Networks (LANs) and
31、Metropolitan Area Networks (MANS). It contains descriptions of the networks considered as well as a reference model (RM) for protocol standards. PA - standard for the identification of public, private, DrototvDe. and standard protocols is included, using either Ethertype values or LLC addresses. Ins
32、ert the following Clause as a new Clause 12: 2. Ethertypes for prototype and vendor-specific protocol development 2.1 Introduction The existing Ethernet Type number space is a finite resource. In order to develop protocols that will use an Ethernet Type value as a protocol identifier, it has histori
33、cally been necessary for vendors to apply for type values from this limited number space, both for development purposes and for assignment to the final protocol. This can lead to waste of the number space for no useful purpose, as some of these protocol developments do not result in viable or usable
34、 protocols. The mechanisms identified in this clause will allow prototype and experimental protocols to be developed without consuming type values, and will also provide a means whereby protocol developers can assign permanent protocol identifier values without consuming type values from this limite
35、d number space. These objectives are supported by three Ethertype assignments, and associated rules for their use: a) Two Ethertype values, known as the Local Experimental Ethertypes (2.2), assigned, as the name implies, for experimental use within a local area; and b) A single Ethertype value, know
36、n as the OUI Extended Ethertype (2.3), assigned for the identification of vendor-specific protocols. The values assigned for these purposes, and the requirements for use of these values, are defined in the following subclauses. 2.2 Local Experimental Ethertypes The Local Experimental Ethertypes are
37、intended for use in conjunction with experimental protocol development within a privately administered development network; for example within an experimental LAN that has no wide area connectivity. Within that network, a local administrator is free to use a Local Experimental Ethertype and to assig
38、n subtypes for protocol development purposes. However, by virtue of the way these Ethertypes are intended to be used, the following practical and administrative constraints apply to their use: a) Since the format for protocols using the Local Experimental Ethertypes does not contain a means to ident
39、ify the administrative domain, it may not be possible to identify the protocol of a frame if protocols developed within different administrative domains using Local Experimental Ethertypes are used in the same network. Hence, the use of these Ethertypes to identify protocols can only be achieved rel
40、iably if all uses of the Ethertypes are within the control of a single administrative 2 Copyright O 2003 IEEE. All rights reserved. Copyright The Institute of Electrical and Electronics Engineers, Inc. Provided by IHS under license with IEEELicensee=IHS Employees/1111111001, User=Wing, Bernie Not fo
41、r Resale, 10/17/2007 03:37:42 MDTNo reproduction or networking permitted without license from IHS -,-,- OVERVIEW AND ARCHITECTURE AMENDMENT 1 AC IEEE Std 802a-2003 Destination Swrce SNAP SNAP UI RFC 1042 Local Experimental Protocol Subtype Protocol Verson Protocol Data (N Fc MAC address MAC address
42、“AA“ “AA“ “03“ OUI 00-00-00 Ethertype (2 octets) (See 12 2) (See 12 2) octets) domain. Therefore, these Ethertypes shall not be used in protocols or products that will be released for use in the wider networking community, as freeware, shareware, or as any part of a companys commercial product offer
43、ing. Product must and shall be transitioned to a product Ethertype before it is deployed in an environment outside the developing organizations administrative control; for example, when deployed with a customer or any other internet working environments for testing. Any request by any individual or
44、organization to have the value of a Local Experimental Ethertype permanently assigned for use with a given protocol or protocols will be summarily refused. It is recommended that devices which bound any administrative domain be configured to prevent frames containing a Local Experimental Ethertype f
45、rom passing either into or out of a domain in which its contents may be misinterpreted. For example, the default configuration of any firewall should be to not pass this Ethertype. b) c) A Local Experimental Ethertype is used in the normal way, as a value that is placed in the Type/Length field of a
46、n Ethernet frame, or as described in 10.5 for encapsulation of Ethernet frames over LLC using SNAP (10.3). In order to allow for different experimental protocols, sub-protocols, and versions, to co-exist within the same experimental network, a protocol subtype and a protocol version identifier shall
47、 be used in conjunction with the Local Experimental Ethertype value. This is illustrated in Figure 1, which shows the format of an Ethernet frame carrying a Local Experimental Ethertype, and Figure 2 shows the format of an IEEE 802.5TM frame carrying a Local Experimental Ethertype. Note that in the
48、case of the 802.5 frame, the Ethertype is carried as part of a SNAP protocol identification field (see Clause 10). The sizes of the protocol subtype and the protocol version identifier fields, and their order of appearance within the frame, are not constrained by this standard. Two Local Experimental Ethertype values are provided, to allow protocols that will need more than one distinct Ethertype value, or two distinct protocols, to be developed within a single administrative domain. In particular, the provision of two Local