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1、BRITISH STANDARD BS ISO/IEC 14700:1997 Information technology Open Systems Interconnection Network Fast Byte Protocol ICS 35.100.30 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 14700:1997 This British Standard, having been prep
2、ared under the direction of the DISC Board, was published under the authority of the Standards Board and comes into effect on 15 December 1997 BSI 06-1999 ISBN 0 580 28855 2 National foreword This British Standard reproduces verbatim ISO/IEC 14700:1997 and implements it as the UK national standard.
3、The UK participation in its preparation was entrusted to Technical Committee IST/6, Data communications, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, an
4、d keep the UK interests informed; monitor related in international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the
5、old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publicat
6、ions referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisi
7、ons 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 This document comprises a front cover, an inside front cover, pages i and ii, the ISO/IEC title
8、page, pages ii to iv, pages 1 to 23 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffie
9、ldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 14700:1997 BSI 06-1999i Contents Page National forewordInside front cover Forewordiv Text of ISO/IEC 147001 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Cop
10、y, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 14700:1997 ii BSI 06-1999 Contents Page Forewordiv Intr
11、oduction1 1Scope 2 2Normative references 2 2.1Identical Recommendations|International Standards 2 2.2Paired Recommendations|International Standards equivalent in technical contents 3 3Definitions 3 3.1This Recommendation|International Standard is based on the concepts developed in ITU-T Rec. X.200|I
12、SO/IEC 7498-1 and makes use of the following terms defined in it: 3 3.2For the purposes of this Recommendation|International Standard, the following definitions apply:3 3.3This Recommendation|International Standard uses the following terms defined in ITU-T Rec. X.290 and ISO/IEC 9646-1: 4 3.4This Re
13、commendation|International Standard uses the following terms defined in ITU-T Rec. X.210|ISO/IEC 10731: 4 4Symbols and abbreviations4 4.1Data units4 4.2NPDU types 4 4.3NPDU fields 4 4.4Miscellaneous 5 5Overview of the Network Fast Byte Protocol 5 5.1Service provided by the Network Layer 5 5.2Service
14、 assumed from the Data Link Layer 5 5.3Functions of the Network Layer 5 5.4Operation over CODLS 7 5.5Model of the Network Layer 8 6 Network Fast Byte Protocol specification 8 6.1Network Protocol Data Unit (NPDU) transfer 9 6.2 Connection establishment 9 6.3 Connection refusal 10 6.4Normal release 11
15、 6.5Error Indication 11 6.6Abnormal release 12 6.7Data transfer 12 6.8Segmenting and reassembling 12 6.9Qualifier-bit 13 6.10 Invalid NPDU 13 6.11 NS-user initiated reset 13 7FB-NPDU Structure and encoding 14 7.1Header part 14 7.2Control part 15 7.3Data part 17 8Conformance 17 Annex A Protocol Imple
16、mentation Conformance Statement (PICS) proforma 18 A.1General18 A.2Identification18 A.3Indices used in this annex 19 A.4Initiator/responder capability to establish connection 19 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 1470
17、0:1997 BSI 06-1999iii Page A.5Supported functions 19 A.6Supported NPDUs 19 A.7Supported FB NPDU fields and parameters 20 A.8Negotiation and selection 20 A.9Error handling 21 Annex B Subnetwork Dependent Convergence Function for subnetworks employing out-of-band signalling 21 B.1Applicable subnetwork
18、s 21 B.2Fast Byte Protocol specification 21 Figure Intro. 1 Relationship between the Network Fast Byte Protocol and adjacent services 1 Figure 1 Model of the network layer 1 Table 1 Network Service primitives 6 Table 2 Connection-Oriented Data link service primitives7 Descriptors: Data processing, i
19、nformation interchange, telecommunications, network interconnection, open systems interconnection, network layer, protocols. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 14700:1997 iv BSI 06-1999 Foreword ISO (the International
20、 Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by t
21、he respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of i
22、nformation technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of the nati
23、onal bodies casting a vote. International Standard ISO/IEC 14700 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 6, Telecommunications and information exchange between systems, in collaboration with ITU-T. The identical text is published as ITU-T Reco
24、mmendation X.633. Annex A forms an integral part of this International Standard. Annex B is for information only. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 14700:1997 BSI 06-19991 Introduction This Recommendation|Internation
25、al Standard is one of a set of Recommendations|International Standards produced to facilitate the interconnection of information processing systems. This set of Recommendations|International Standards covers the services and protocols required to achieve such interconnection. The Network Fast Byte P
26、rotocol Recommendation|International Standard is positioned with respect to other related Recommendations|International Standards by the layers defined in the Reference Model for Open Systems Interconnection (see ITU-T Rec. X.200|ISO/IEC 7498-1). It is most closely related to, and lies within the fi
27、eld of application of the Network Service definition (ITU-T Rec. X.213|ISO/IEC 8348). It also uses and makes reference to the Data Link Service definition (see ITU-T Rec. X212|ISO/IEC 8886), whose provisions it assumes in order to accomplish Network Fast Bytes aims. The interrelationship of these Re
28、commendations|International Standards is illustrated in Figure Intro. 1. This Recommendation|International Standard specifies a common encoding and protocol procedures. It is intended that the Network Fast Byte should be simple and cater for a specific range of Data Link Service qualities possible.
29、This Recommendation|International Standard does not define mechanisms that can be used to optimize or enhance the quality of the Data Link Service. The primary aim of this Recommendation|International Standard is to provide a set of rules for communication expressed in terms of the procedures to be
30、carried out by peer entities at the time of communication. These rules for communication are intended to provide a sound basis for development in order to serve a variety of purposes: a) as a guide for implementors and designers; b) for use in the testing and procurement of equipment; c) as part of
31、an agreement for the admittance of systems into the open systems environment; d) as a refinement of the understanding of OSI. As it is expected that the initial users of this Recommendation|International Standard will be designers and implementors of equipment, this contains, in notes or in annexes,
32、 guidance on the implementation of the procedures defined herein. This Recommendation|International Standard contains a clause on conformance of equipment claiming to implement the procedures in this Recommendation|International Standard (see clause 8). To evaluate conformance of a particular implem
33、entation, it is necessary to have a statement of which capabilities and options have been implemented for a given OSI protocol. Such a statement is called a Protocol Implementation Conformance Statement (PICS). A PICS proforma is provided in Annex A. Attention is drawn to the fact that this Recommen
34、dation|International Standard does not contain any tests to demonstrate this conformance. Figure Intro. 1 Relationship between the Network Fast Byte Protocol and adjacent services Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 BSI 06-1999
35、 BS ISO/IEC 14700:1997 It should be noted that it may not be possible with current technology to verify that an implementation will operate the protocol defined in this Recommendation|International Standard correctly under all circumstances. It is possible by means of testing to establish confidence
36、 that an implementation correctly operates the protocol in a representative sample of circumstances. It is, however, intended that this Recommendation|International Standard can be used in circumstances where two implementations fail to communicate in order to determine whether one or both have fail
37、ed to operate the protocol correctly. 1 Scope This Recommendation|International Standard specifies: a) procedures when operating over the connection-mode data link service for the connection-mode transfer of data and control information from one network entity to a peer network entity; b) the struct
38、ure and encoding of the NPDUs used for the transfer of data and control information. The procedures are defined in terms of: a) the interactions between peer network entities through the exchange of NPDUs; b) the interactions between a network entity and the network service user in the same system t
39、hrough the exchange of network service primitives; c) the interactions between a network entity and the data link service provider through the exchange of data link service primitives. These procedures are applicable to instances of communication between systems which support the Network Layer of th
40、e OSI Reference Model and wish to interconnect in the open systems environment using the Network Fast Byte Protocol. This Recommendation|International Standard specifies, in clause 8, conformance requirements for systems implementing these procedures and provides the PICS proforma in compliance with
41、 the relevant requirements, and in accordance with the relevant guidance, given in ITU-T Rec. X.296 and ISO/IEC 9646-7. It does not contain tests which can be used to demonstrate this conformance. 2 Normative references The following Recommendations and International Standards contain provisions whi
42、ch, through reference in this text, constitute provisions of this Recommendation|International Standard. At the time of publication, the editions indicated were valid. All Recommendations and International Standards are subject to revision and parties to agreements based on this Recommendation|Inter
43、national Standard are encouraged to investigate the possibility of applying the most recent edition of the Recommendations and International Standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of t
44、he ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identical Recommendations|International Standards ITU-T Recommendation X.200 (1994)|ISO/IEC 7498-1:1994, Information technology Open Systems Interconnection Basic Reference Model: The Basic Model. ITU-T Recommendation X.210 (1993)
45、|ISO/IEC 10731:1994, Information technology Open Systems Interconnection Basic Reference Model: Conventions for the definition of OSI services. ITU-T Recommendation X.212 (1995)|ISO/IEC 8886:1996, Information technology Open Systems Interconnection Data link service definition. ITU-T Recommendation
46、X.213 (1995)|ISO/IEC 8348:1996, Information technology Open Systems Interconnection Network Service Definition. ITU-T Recommendation X.233 (1993)|ISO/IEC 8473-1:1994, Information technology Protocol for providing the connectionless-mode network service: Protocol specification. ITU-T Recommendation X
47、.263 (1995)|ISO/IEC TR 9577., Information technology Protocol identification in the Network layer1). 1) To be published. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 22 09:59:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 14700:1997 BSI 06-19993 2.2 Paired Recommendations|Internatio
48、nal Standards equivalent in technical contents ITU-T Recommendation X.223 (1993), Use of X.25 to provide the OSI connection-mode network service for ITU-T applications. ISO/IEC 8878:1992, Information technology Telecommunications and information exchange between systems Use of X.25 to provide the OS
49、I Connection-mode Network Service. ITU-T Recommendation X.290 (1995), OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications General concepts. ISO/IEC 9646-1:1994, Information technology Open Systems Interconnection Conformance testing methodology and framework Part 1: General concepts. ITU-T Recommendation X.296 (1995), OSI conformance testing methodology and framework for protocol Recommendations for ITU-T applications Implementation conformance statements.