ISO/IEC TECHNICAL REPORT TR 9577 Fourth edition 1999-12-15 Information technology Protocol identification in the network layer Technologies de I'information ldentification des protocoles dans la couchereseau Reference number ISO/IEC TR 9577:1999(E) E( @ISO/IEC 1999 py IHS under Not for Resale ISO/IEC TR 9577:1999(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by isO member bodies. In the unlikely event ISO/IEC1999 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 either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 734 10 79 E-mail [email protected] Web www.iso.ch Printed in Switzerland @ISO/IEC1999-All rightsreserved Not for Resale ISO/IEC TR 9577 : 1999 (E) CONTENTS Page 1 Scope 1 2 References 1 2.1 Identical Recommendations I International Standards 2 2.2 Paired Recommendations I International Standards equivalent in technical content 2 2.3 Additionalreferences 2 3 Abbreviations 4 4 Protocol identifiers 4 5 Initial protocol identifier.. 5.1 General ... 5.2 Assignment structure for header-oriented protocols ... 6 5.3 Values assigned to the IPI for header-oriented protocols. 6 5.4 Assignment structure for trailer-oriented protocols... 8 5.5 Values assigned to the IPI for trailer-oriented protocols . 8 6 Subsequent protocol identifier.. 9 6.1 General . 9 6.2 Assignment structure for header-oriented protocols 10 6.3 Values assigned to the SPI for header-oriented protocols 10 6.4 Assignment structurefortrailer-orientedprotocols. 12 6.5 Values assigned to the SPI for trailer-oriented protocols 12 Annex A The location and use of protocol identifiers in X.25 Packet Layer Protocol 13 Annex B Guidelines on the processing of protocol identifiers 15 B.1 Originating systems.. 15 B.2 Destination systems.. 15 Annex C - Identification of Internet protocols . 17 Annex D - Identification of protocols that are discriminated according to the IEEE-defined SNAP convention.. 18 Annex E - Identification of protocols specified by the Frame Relay Forum.. 19 iii se from IHS Not for Resale