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ČESKÁ TECHNICKÁ NORMA |
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ICS 35.110 |
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Červenec 1998 |
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Informační technologie - |
ČSN 36 9236 |
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Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Technical reports and guidelines - Part 1: The structure and coding of Logical Link Control addresses in Local Area Networks
Technologies de l'information - Télécommunications et échange d'information entre systèmes - Réseaux locaux et métropolitains - Rapports techniques et lignes directrices - Partie 1: - Structure et codage des adresses de contrôle liaison logique dans les réseaux locaux
Informationstechnik - Telekommunikation und Informationsaustausch zwischen Systemen - Lokale und Regionale Netze - Fachberichte und Leitfäden - Teil 1: Struktur und Codierung von LLC-Adressen in lokalen Netzen
Tato norma přejímá anglickou verzi mezinárodní normy ISO/IEC TR 11802-1:1997. Mezinárodní norma ISO/IEC TR 11802-1:1997 má status české technické normy.
This standard implements the English version of the International Standard ISO/IEC TR 11802-1:1997. The International Standard ISO/IEC TR 11802-1:1997 has the status of a Czech Standard.
© Český normalizační institut, 1998
Podle zákona č. 22/1997 Sb. smějí být české technické normy rozmnožovány a rozšiřovány jen se souhlasem Českého normalizačního institutu.
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52519 |
Národní předmluva
ISO/IEC TR 11802-1 byla zpracována v komisi ISO/IEC JTC1 Informační technologie, subkomise SC 6 - Telekomunikace a výměna informací mezi systémy jako Technická zpráva typu 3.
Citované normy
ISO/IEC TR 9577:1996 dosud nezavedena
ISO/IEC 8802-2:1994 dosud nezavedena
Vypracování normy
Zpracovatel: TESLA TELEKOMUNIKACE, spol. s r. o., IČO 41194403, Ing. Jiří Ženíšek, CSc.
Technická normalizační komise: TNK 20 Informační technologie
Pracovník Českého normalizačního institutu: Ing. Jitka Procházková
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TECHNICAL |
ISO/IEC |
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REPORT |
TR 11802-1 |
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Second edition |
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1997-08-15 |
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Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Technical reports and guidelines - Part 1: The structure and coding of Logical Link Control addresses in Local Area Networks
Technologies de l'information - Télécommunications et échange d'information entre systèmes - Réseaux locaux et métropolitains - Rapports techniques et lignes directrices - Partie 1: - Structure et codage des adresses de contrôle liaison logique dans les réseaux locaux
Reference number
ISO/IEC TR 11802-1:1997(E)
Contents |
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page |
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Foreword | III |
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Introduction | IV |
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1. |
Scope |
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2. |
References |
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3. |
Abbreviations |
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4. |
General considerations |
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4.1 |
Functions of LLC addresses |
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4.2 |
Binary and Hexadecimal representation of LLC addresses |
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4.2.1 |
Binary representation |
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4.2.2 |
Hexadecimal representation |
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4.2.3 |
Bit order of transmission |
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4.3 |
The null address |
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4.3.1 |
Function of the null address |
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4.3.2 |
Definition of the null address |
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4.4 |
The global address |
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4.4.1 |
Function of the global address |
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4.4.2 |
Definition of the global address |
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4.5 |
The address used in conjuction with ISO/IEC TR 9577 |
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5.6 |
The address used in conjuction with SNAP |
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5. |
Unreserved addresses |
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6. |
Reserved addresses |
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7. |
Procedures for assignment of reserved addresses |
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7.1 |
General considerations |
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7.2 |
Specific procedures |
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8. |
LLC address assignments |
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Tables |
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Table 1 - Individual LLC address values |
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Table 2 - Group LLC address values |
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Annexes |
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A General format of ISO/IEC 8802-2 addresses |
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B IEEE 802 - Sub-Network Access Protocol (SNAP) |
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C Guidelines for requesting an LLC address value |
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Ó ISO/IEC 1997 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
ISO/IEC Copyright Office · Case postale 56 · CH-1211 Genève 20 · Switzerland
Printed in Switzerland
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialised system for worldwide standardisation. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organisation to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organisations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work.
In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
The main task of technical committees is to prepare International Standards, but in exceptional a technical committee may propose the publication of a Technical Report of one of the following types:
- type 1, when the required support cannot be obtained for the publication of an International Standard, despite repeated efforts;
- type 2, when the subject is still under technical development or where for any other reason there is the future but not immediate possibility of an agreement on an International Standard;
- type 3, when a technical committee has collected data of a different kind from that which is normally published as an International Standard ("state of the art", for example).
Technical Reports of types 1 and 2 are subject to review within three years of publication, to decide whether they can be transformed into International Standards. Technical Reports of type 3 do not necessarily have to be reviewed until the data they provide are considered to be no longer valid or useful.
ISO/IEC TR 11802-1, which is a Technical Report of type 3, was prepared by ISO/IEC JTC 1, Information technology, Subcommittee SC 6, Telecommuni-cations and information exchange between systems.
This second edition cancels and replaces the first edition (ISO/IEC TR 11802-1:1995), which has been technically revised.
ISO/IEC 11802 consists of the following parts, under the general title Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Technical reports and guidelines:
- Part 1: The structure and coding of Logical Link Control addresses in Local Area Networks [Technical Report]
- Part 2: Standard Group MAC Addresses [Technical Report]
- Part 4: Token ring access method and physical layer specifications - Fibre optic station attachment
Introduction
The standards for LANs are generally comprised of the physical layer, the medium access control (MAC) sublayer, and the logical link control (LLC) sublayer. In OSI terminology, the MAC and LLC sublayers are considered to be sublayers of the OSI data link layer. Both the MAC and LLC sublayers contain fields for addressing.
This Technical Report contains a description of the LLC addresses, together with a list of those values in current use.
The addressing space in LLC is limited, and it is such that it is considered to be a scarce resource. t is therefore prudent to consume this resource in a considered and conservative manner. To this end this Technical Report indicates the kind of considerations which will be used by ISO/IEC when making the association between a particular LLC address value and use to which it is put. These considerations are intended to be sufficiently broad to allow a wide variety of LLC address uses to be recorded, and also sufficiently restrictive so that addresses values are not unwisely assigned.
This Technical Report will be kept up to date by ISO/IEC JTC 1 as new entries are added to the tables.
TECHNICAL REPORT Ó ISO/IEC ISO/IEC TR 11802-1:1997(E)
Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Technical reports and guidelines - Part 1: The structure and coding of Logical Link Control addresses in Local Area Networks
1. Scope
This Technical Report provides:
a) a description of the ISO/IEC 8802-2 LLC addressing conventions,
b) the consideration for the manner in which new LLC address uses are assigned an entry in this Technical Report, and
c) a record, in the form of a table, of assigned uses of ISO/IEC 8802-2 LLC address values.
This Technical Report is for use by implementers to ascertain the value, or values, of LLC addresses that have been assigned for use in particular circumstance.
It is outside the scope of this Technical Report to provide architectural judgements regarding the entities which are identified by particular address value(s).
-- Vynechaný text --
Zdroj: www.cni.cz