ISO 9542-1988 Information processing systems telecommunications and information exchange between systems end system to intermediate system routeing exchange pro.pdf
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1、INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEX/JYHAPOAHAR OPrAHM3AUMR Il0 CTAHAAPTMSAUMM Information processing systems - Telecommunications and information exchange between systems - End system to Intermediate system routeing e
2、xchange protocol for use in conjunction with the Protocol for providing the connectionless-mode network service (IS0 8473) Systhes de traitement de Iinformation - Tdldinformatique - Protocole de routage dun systhe dextr6mitd B un syst o minimize the amount of memory needed to store routeing informat
3、ion in end systems; and o minimize the computational complexity of End Sys- tem routeing algorithms. 1 Scope and Field of Application This International Standard specifies a protocol which is med by Network Layer entities operating IS08473 in End Systems and Intermediate Systems (referred to herein
4、as ES and IS respectively) to maintain route- ing information. The Protocol herein described relies upon the provision of a connectionless-mode underlying service.) This International Standard specifies: a) procedures for the transmission of configuration and ronteing information between Network ent
5、ities residing in End Systems and Network entities re- siding in Intermediate Systems; b) the encoding of the protocol data units used for the transmission of the configuration and routeing information; c) procedures for the correct interpretation of protocol control information; and d) the function
6、al requirements for implementations claiming conformance to this International Stan- dard. The procedures are defined in terms of: a) the interactions between End System and Inter- mediate System Network entities through the ex- change of protocol data units; and b) the interactions between a Networ
7、k entity and an underlying service provider through the exchange of subnetwork service primitives. This International Standard does not specify any pro- tocol elements or algorithms for facilitating routeing and relaying among Intermediate Systems. Such functions are intentionally beyond the scope o
8、f this International Standard. 2 References ISO7498, Information processing systems - Open systems interconnection - Basic reference model. IS0 74D8lAdd.1, Informa.tion processing systems - Open systems interconnection - Ba.sic reference model. ADDENDUM 1: Connectionless-mode tra.nsmission. IS0 7498
9、lAdd.4, Information processing systems - Open systems interconnection - Basic reference model. ADDENDUM 4: OSI Management Framework. IS0 8208, Information processing systems - Da.ta. communica.tions - X.25 Packet Level Protocol for Dada. Terminal Equipment. IS0 8348, Information processing systems -
10、 Da.ta. communications - Network Service Definition. IS0 83481Add.1, Information processing systems - Data communica.tions - Network Service Definilion ADDENDUM 1: Connectionless-mode Tra.nsmission. IS0 8348lAdd.2, Informa.tion processing systems - Data communications - Network Service Definition. A
11、DDENDUM 2: Network La.yer Addressing. IS0 8473, Informa.tion processing systems - Da.t.a. communications - Protocol for providing th.e connec- tionless-mode Network Service. IS0 8648, Information processing systems - Open- Systems Interconnection - Interna.1 orga.niza.tion. of Ch.e Network layer. IS
12、0 8802, Information processing systems - Da.ta. communications - Local Area Networks. CCITT X.25, Interface Between Data. Termina.1 Equ.ip- ment (DTE and Data Circuit Termina.ting Equ.ipment (DCE for Terminals Operating in the Pa.cket Mode a.nd Connected to Public Data Networks by Dedicated Cir- cui
13、t, 1985. 1) See Clause 8 of IS0 8473 for the mechanisms necessary to re- olize this service on subnetworks based on IS0 8208 and IS0 8802. 2 * Section one: .General 3 Definitions 3.1 Reference Model Definitions IS0 9542 makes me of the following terms defined in IS0 i498. a) Network layer b) Network
14、 service access point c) Network service access point address d) Network entity e) routeing f) Net.work protocol g) Network relay h) Network protocol data unit 3.2 Network Layer Architecture Defini- tions IS0 9542 makes use of the following terms defined in IS0 8G48. a) Subnetwork b) End System c) I
15、ntermediate System d) Subnetwork Service e) Subnetwork Dependent Convergence Function 3.3 Network Layer Addressing Defini- tions IS0 9542 makes use of the following terms defined in IS0 8348/Add.2. a) Subnetwork address b) Subnetwork point of attachment c) Network Protocol Address Information d) Net
16、work Entity Title 3.4 Local Area Network Definitions IS0 9542 makes use of the following terms defined in IS0 8802. a) multicast address b) broadcast medium 3.5 Additional Definitions For the purposes of this International Standard, the fol- lowing definition applies. 3.6.1 Configuration: The collec
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- ISO95421988INFORMATIONPROCESSINGSYSTEMSTELECOMMUNICATIONSANDINFORMATIONEXCHANGEBETWEENSYSTEMSENDSYSTEMTOINTERMEDIATESYSTEMROUTEINGEXCHANGEPROPDF

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