1、BRITISH STANDARD BS EN ISP 10613-5:1997 Incorporating Amendment No. 1 to BS ISO/IEC ISP 10613-5:1994 (renumbers BS as BSEN ISP 10613-5: 1997) Information technology International Standardized ProfileRA Relayingthe Connectionless-mode Network Service Part 5: Definition of profile RA51.51, relaying th
2、e Connectionless-mode Network Service between CSMA/CD LAN subnetworks The European Standard EN ISP 10613-5:1996 has the status of a British Standard ICS 35.100.05BSENISP10613-5:1997 This British Standard, having been prepared under the directionof the Information Systems Technology Standards Policy
3、Committee, was publishedunder the authority ofthe Standards Board and comesinto effect on 15January1995 BSI 03-2000 The following BSI references relate to the work on this standard: Committee reference IST/6 Draft for comment 92/68653 DC ISBN 0 580 23670 6 Committees responsible for this British Sta
4、ndard The preparation of this British Standard was entrusted by the Information Systems Technology Standards Policy Committee (IST/-) to Technical Committee IST/6, upon which the following bodies were represented: British Computer Society British Telecommunications plc CCTA (the Government Centre fo
5、r Information Systems) Digital Equipment Co. Ltd. IBM United Kingdom Ltd. Institution of Electrical Engineers International Computers Limited Joint Information Systems Committee Logica UK Ltd. Nine Tiles Computer Systems Ltd. Rank Xerox Ltd. Amendments issued since publication Amd. No. Date Comments
6、 9577 September 1997 Indicated by a sideline in the marginBSENISP10613-5:1997 BSI 03-2000 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Foreword iii Text of ISO/IEC ISP 10613-5 1BSENISP10613-5:1997 ii BSI 03-2000 National foreword This British Standard has
7、 been prepared by Technical Committee IST/6 and is the English language version of EN ISP10613-5:1996 Information technology International Standardized Profile RA Relaying the Connectionless-mode Network Service Part5: Definition of profile RA51.51, relaying the Connectionless-mode Network Service b
8、etween CSMA/CD LAN subnetworks, published by the European Committee for Standardization (CEN). It is identical with ISO/IEC ISP10613-5:1994 published by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). It supersedes DD ENV 41801-5:1992
9、, which is withdrawn. This British Standard is published under the direction of the Information Systems Technology Standards Policy Committee whose Technical Committee IST/6 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquir
10、ies on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High
11、 Road, London W4 4AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages Th
12、is document comprises a front cover, an inside front cover, pages i and ii, theEN ISP title page, page 2, the ISO/IEC ISP title page, pages ii to iv, pages1to4 and a backcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the
13、 amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISP 10613-5 January 1996 ICS 35.100 Supersedes ENV 41801-5:1992 Descriptors: Data processing, information interchange, network interconnection, open systems interconnection, data transmission, communicati
14、on procedure, control procedures, network layer, profiles. English version Information technology International Standardized Profile RA Relaying the Connectionless-mode Network Service Part 5: Definition of profile RA51.51, relaying the Connectionless-mode Network Service between CSMA/CD LAN subnetw
15、orks (ISO/IEC ISP 10613-5:1994) Technologie de linformation Profil normalis international RA Relais de service de rseau en mode sans connexion Partie 5: Dfinition du profil RA51.551, relai de service de rseau en mode sans connexion entre sous-rseaux CSMA/CD LAN (ISO/IEC ISP10613-5:1994) This Europea
16、n Standard was approved by CEN on 1995-10-04. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concernin
17、g such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own lang
18、uage and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
19、United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its me
20、mbers. Ref. No. EN ISP 10613-5:1996 EENISP10613-5:1996 BSI 03-2000 2 Foreword The text of the International Standard from ISO/IEC/JTC 1, Information technology, of the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC) has been taken over as
21、a European Standard by CEN Technical Board. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 1996, and conflicting national standards shall be withdrawn at the latest by July 1996. According t
22、o CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. NOTEEN ISP 10
23、613-5 replaces ENV 41801-5:1992. For the time being, this document exists in the English version only.ISO/IECISP10613-5:1994(E) ii BSI 03-2000 Contents Page Foreword iii Introduction 1 1 Scope 1 1.1 General 1 1.2 Position within the Taxonomy 1 1.3 Scenario 1 2 Normative references 2 3 Definitions 2
24、4 Abbreviations 2 5 Requirements 3 5.1 Static Conformance Requirements 3 5.2 Dynamic Conformance Requirements 3 Annex A (normative) ISPICS Requirements List 4 A.1 General Options of the Profile 4 A.2 Base Standards Selected and Combined in the Profile 4 A.3 Constraints on Base Standards 4 Figure 1 S
25、cenario of applicability of the RA51.51 profile 1 Figure 2 Profile Protocol Stack 2ISO/IECISP10613-5:1994(E) BSI 03-2000 iii Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardiza
26、tion. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutua
27、l interest. Other international organizations, 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 JTC1. In addition to developing International Standards
28、, ISO/IEC JTC1 has created a Special Group on Functional Standardization for the elaboration of International Standardized Profiles. An International Standardized Profile is an internationally agreed, harmonized document which identifies a standard or group of standards, together with options and pa
29、rameters, necessary to accomplish a function or a set of functions. Draft International Standardized Profiles are circulated to national bodies for voting. Publication as an International Standardized Profile requires approval by at least 75% of the national bodies casting a vote. International Stan
30、dardized Profile ISO/IEC ISP 10613-5 was prepared with the collaboration of Asia-Oceania Workshop (AOW); European Workshop for Open Systems (EWOS); Open Systems Environment Implementors Workshop (OIW). ISO/IEC ISP 10613 consists of several parts, under the general title Information technology Intern
31、ational Standardized Profile RA Relaying the Connectionless-mode Network Service: Part 1: Subnetwork-independent requirements; Part 2: LAN subnetwork-dependent, media-independent requirements; Part 3: CSMA/CD LAN subnetwork-dependent, media-dependent requirements; Part 4: FDDI LAN subnetwork-depende
32、nt, media-dependent requirements; Part 5: Definition of profile RA51.51, relaying the Connectionless-mode Network Service between CSMA/CD LAN subnetworks; Part 6: Definition of profile RA51.54, relaying the Connectionless-mode Network Service between CSMA/CD LAN subnetworks and FDDI LAN subnetworks;
33、 Part 7: PSDN subnetwork-dependent, media-dependent requirements for virtual calls over a permanent access; Part 8: Definition of profile RA51.1111, relaying the Connectionless-mode Network Service between CSMA/CD LAN subnetworks and PSDNs using virtual calls over a PSTN leased line permanent access
34、; Part 9: Definition of profile RA51.1121, relaying the Connectionless-mode Network Service between CSMA/CD LAN subnetworks and PSDNs using virtual calls over a digital data circuit/CSDN leased line permanent access; Part 10: Token Ring LAN subnetwork-dependent, media-dependent requirements; Part 11
35、: Definition of profile RA51.53, relaying the Connectionless-mode Network Service between CSMA/CD LAN subnetworks and Token Ring LAN subnetworks;ISO/IECISP10613-5:1994(E) iv BSI 03-2000 Part 12: Definition of profile RA53.53, relaying the Connectionless-mode Network Service between Token Ring LAN su
36、bnetworks; Part 13: Definition of profile RA53.54, relaying the Connectionless-mode Network Service between Token Ring LAN subnetworks and FDDI LAN subnetworks; Part 14: Definition of profile RA54.54, relaying the Connectionless-mode Network Service between FDDI LAN subnetworks; Part 15: Definition
37、of profile RA53.1111, relaying the Connectionless-mode Network Service between Token Ring LAN subnetworks and PSDNs using virtual calls over a PSTN leased line permanent access; Part 16: Definition of profile RA53.1121, relaying the Connectionless-mode Network Service between Token Ring LAN subnetwo
38、rks and PSDNs using virtual calls over a digital data circuit/CSDN leased line permanent access; Part 17: Definition of profile RA54.1111, relaying the Connectionless-mode Network Service between FDDI LAN subnetworks and PSDNs using virtual calls over a PSTN leased line permanent access; Part 18: De
39、finition of profile RA54.1121, relaying the Connectionless-mode Network Service between FDDI LAN subnetworks and PSDNs using virtual calls over a digital data circuit/CSDN leased line permanent access. Annex A forms an integral part of this part of ISO/IEC ISP 10613.ISO/IECISP10613-5:1994(E) BSI 03-
40、2000 1 Introduction This International Standardized Profile (ISP) is defined in accordance with the principles specified by ISO/IEC Technical Report 10000. The context of Functional Standardization is one area in the overall field of Information Technology (IT) standardization activities, covering b
41、ase standards, profiles, and registration mechanisms. A profile defines a combination of base standards that collectively perform a specific well-defined IT function. Profiles standardize the use of options and other variations in the base standards, and provide a basis for the development of unifor
42、m, internationally recognized system tests. ISPs are produced not simply to “legitimize” a particular choice of base standards and options, but to promote real system interoperability. One of the most important roles for an ISP is to serve as the basis for the development (by organizations other tha
43、n ISO and IEC) of internationally recognized tests. The development and widespread acceptance of tests based on this and other ISPs is crucial to the successful realization of this goal. ISO/IEC ISP 10613 consists of several parts ofwhich this is part 5. ISO/IEC ISP 10613-1 specifies the profile req
44、uirements that are subnetwork-independent. There are further partswhich specify subnetwork-dependent and media-dependent requirements. In addition, for each individual profile there is a part of ISO/IEC ISP 10613 which identifies the specific requirements of that profile, making reference to appropr
45、iate material from part1 and from the subnetwork dependent parts of ISO/IEC ISP 10613. 1 Scope 1.1 General This International Standardized Profile is applicable to interworking units concerned with operating in the Open Systems Interconnection (OSI) environment. It specifies a combination of OSI bas
46、e standards that collectively provide a Network Relay function for the connectionless-mode Network Service. This part of ISO/IEC ISP 10613 defines the RA51.51 profile, which is applicable to interworking units operating between CSMA/CD LAN subnetworks. 1.2 Position within the Taxonomy The taxonomy o
47、f profiles is defined in ISO/IEC/TR 10000-2. This part of ISO/IEC ISP 10613 defines the profile: 1.3 Scenario Figure 1 illustrates the configuration of systems to which the RA51.51 profile is applicable. The figure shows two reference points, but an implementation of this profile may include any num
48、ber of CSMA/CD LAN attachments, with a reference point corresponding to each. RA51.51: Relaying the Connectionless-mode Network Service between CSMA/CD LAN subnetworks. Figure 1 Scenario of applicability of the RA51.51 profileISO/IECISP10613-5:1994(E) 2 BSI 03-2000 As this profile is a member of the
49、 RA group, it is intended that a conforming implementation is capable of interworking with other profiles of the RA group and with End Systems implementing profiles from the TA group or from the UA group, provided that suitable relays are in place in the case of those members of these groups which relate to different elements of the subnetwork taxonomy. This part of ISO/IEC ISP 10613 specifies the required functions from the supporting protocol stack shown in Figure 2. 2 Normative r
