BS-ISO-IEC-8473-1-1998.pdf
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1、BRITISH STANDARD BS ISO/IEC 8473-1:1998 Information technology Protocol for providing the connectionless-mode network service Part 1: Protocol specification ICS 35.100.30 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 8473-1:1998
2、 This British Standard, having been prepared under the direction of the DISC Board, was published under the authority of the Standards Committee and comes into effect on 15 February 1999 BSI 06-1999 ISBN 0 580 32021 9 National foreword This British Standard reproduces verbatim ISO/IEC 8473-1:1998 an
3、d implements it as the UK national standard. It supersedes BS ISO/IEC 8473-1:1994 which is withdrawn. 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 respons
4、ible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on requ
5、est to its secretary. Cross-references The British Standards which implement international or European publications 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 t
6、he BSI Standards Electronic Catalogue. 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. Su
7、mmary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO/IEC title page, pages ii to vi, pages 1 to 60 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 t
8、able on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 8473-1:1998 BSI 06-1999i Contents Page National forewordInside front cover Forewordv Text of
9、ISO/IEC 8473-11 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:
10、08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 8473-1:1998 ii BSI 06-1999 Contents Page Forewordv Introduction1 1Scope1 2Normative references2 2.1Identical Recommendations|International Standards2 2.2Paired Recommendations|International Standards equivalent in technical content2 2.3Additio
11、nal references2 3Definitions3 3.1Reference model definitions3 3.2Service conventions definitions3 3.3Network layer architecture definitions3 3.4Network layer addressing definitions3 3.5Local area network definitions4 3.6PICS definitions4 3.7Additional definitions4 4Abbreviations5 4.1Data units5 4.2P
12、rotocol data units5 4.3Protocol data unit fields5 4.4Parameters5 4.5Miscellaneous6 5Overview of the protocol6 5.1Internal organization of the Network layer6 5.2Subsets of the protocol6 5.3Addresses and titles6 5.4Service provided by the protocol7 5.5Underlying service assumed by the protocol7 6Proto
13、col functions8 6.1PDU composition function8 6.2PDU decomposition function8 6.3Header format analysis function9 6.4PDU lifetime control function9 6.5Route PDU function10 6.6Forward PDU function10 6.7Segmentation function10 6.8Reassembly function11 6.9Discard PDU function11 6.10 Error reporting functi
14、on12 6.11 PDU header error detection function14 6.12 Padding function14 6.13 Security function14 6.14 Source routeing function14 6.15 Record route function15 6.16 Quality of service maintenance function16 6.17 Priority function16 6.18 Congestion notification function16 6.19 Echo request function17 6
15、.20 Echo response function17 6.21 Scope control function18 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 8473-1:1998 BSI 06-1999iii Page 6.22 Classification of functions19 7Structure and encoding of PDUs20 7.1Structure20 7.2Fixe
16、d part21 7.3Address part22 7.4Segmentation part24 7.5Options part24 7.6Data part30 7.7Data PDU31 7.8Inactive Network layer protocol32 7.9Error Report PDU32 7.10 Echo Request PDU35 7.11 Echo Response PDU35 7.12 Multicast Data PDU35 8Provision of the underlying service35 8.1Subnetwork points of attach
17、ment35 8.2Subnetwork quality of service35 8.3Subnetwork user data37 8.4Subnetwork dependent convergence functions37 9Conformance37 9.1Static conformance37 9.2Dynamic conformance39 9.3PICS proforma39 Annex A PICS proforma40 A.1Introduction40 A.2Abbreviations and special symbols40 A.3Instructions for
18、completing the PICS proforma40 A.4Identification42 A.5Major capabilities43 A.6End systems43 A.7Intermediate systems49 Annex B Supporting technical material55 B.1Data unit lifetime55 B.2Reassembly lifetime control56 B.3The power of the header error detection function57 Annex C Algorithms for PDU head
19、er error detection function59 C.1Symbols used in algorithms59 C.2Arithmetic conventions59 C.3Algorithm for generating checksum parameters59 C.4Algorithm for checking checksum parameters59 C.5Algorithm to adjust the checksum parameter when an octet is altered60 Figure Intro. 1 Interrelationship of pr
20、otocol and services1 Figure 1 PDU structure20 Figure 2 PDU header Fixed part21 Figure 3 PDU header Address part23 Figure 4 Address parameters23 Figure 5 PDU header Segmentation part24 Figure 6 PDU header Options part24 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:08 GMT+00:00 2006, U
21、ncontrolled Copy, (c) BSI BS ISO/IEC 8473-1:1998 iv BSI 06-1999 Page Figure 7 Encoding of option parameters25 Figure 8 PDU header Data part30 Figure 9 Data PDU31 Figure 10 Inactive Network Layer Protocol PDU32 Figure 11 Error Report PDU33 Table 1 Connectionless-mode Network service primitive7 Table
22、2 Underlying service primitive8 Table 3 Categorization of protocol functions19 Table 4 PDU type codes22 Table 5 Processing requirement codes25 Table 6 Security format codes26 Table 7 QOS format codes28 Table 8 Globally unique QOS parameter values29 Table 9 Reason for discard parameter values34 Table
23、 10 Static conformance requirements38 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 23 01:34:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO/IEC 8473-1:1998 BSI 06-1999v Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commissio
24、n) 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 the respective organization to deal with particular fields of technical activity. ISO and
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