ISO IEC 8882-3-2000 Information technology - Telecommunications and information exchange between systems - X 25 DTE conformance testing - Part 3 Packet layer co.pdf

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1、STD.IS0 8882-3-ENGL 2000 I 4853903 0832342 337 INTERNATIONAL STANDARD ISOIIEC 8882-3 Third edition 2000-04-1 5 Information technology - Telecommunications and information exchange between systems - X.25 DTE conformance testing - Part 3: Packet layer conformance test suite Technologies de linformatio

2、n - Tlcommunications et change dinformation entre systmes - Test de conformit X.25 DTE - Partie 3: Suite dessais de conformit pour la couche paquet Reference number ISO/IEC 8882-3:2000(E) ISO/IEC 2000 PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing po

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5、 to ensure that the file is suitable for use by IS0 member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. O ISO/IEC 2000 All rights reserved. Unless otheiwise specified, no part of this publication may be reprod

6、uced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IS0 at the address below or ISOs member body in the country of the requester. IS0 copyright office Case postale 56 CH-121 1 Geneva 20 Tel. + 41 22 7

7、49 O1 11 Fax + 41 22 734 10 79 E-mail copyrightiso.ch Web www.iso.ch Printed in Switzerland O ISO/IEC 2000 -All rights reserved STD-IS0 BB82-3-ENGL 2000 4851903 0832344 LOT I ISOIIEC 8882-3:2000(E) Contents Page 1 . SCOPE i 2 . NORMATIVE REFERENCES i 3 . DEFINITIONS 2 4 . ABBREVIATIONS . 3 5 . CONFO

8、RMANCE 3 6 . TEST SUITE INFORMATION 3 6.1 PACKET LAYER TEST SUITE STRUCTURE . 3 6.2 PACKET LAYER INITIALIZATION . 4 6.4 TIMER DEFINITIONS . 6 6.5 CAUSE CODES AND DIAGNOSTIC CODES 6 6.6 FACILITY FIELDS 7 6.7 DATA TRANSFER STATES . 7 6.8 OTHER USER DATA FIELDS 7 6.9 TRANSIENT STATES 7 6.10 RELATIONSHI

9、P OF PICS TO TEST SUITE . 7 6.11 RELATIONSHIP OF PIXIT TO TEST SUITE . 8 6.12 TEST CASE SELECTION 8 6.13 PIXIT PROFORMA . 8 6.14 ACCEPTABLE UNEXPECTED RESPONSES . 18 6.15 IMPLICIT SEND 18 6.16 ENCODING AND ORDER OF BIT TRANSMISSION 18 6.17 BASIC INTERCONNECTION TESTS 18 ANNEX A ABSTRACT TEST SUITE (

10、ATS) . 19 A.1 THE TTCN GRAPHICAL FORM (lTCN.GR) 19 A.2 THE TTCN MACHINE PROCESSABLE FORM (TTCN.MP) . 19 6.3 DTE-INITIATED ACTIONS . 6 O ISO/IEC 2000 -All rights resewed iii STD.ISO 8882-3-ENGL 2000 4853903 0832345 O4b H ISOIIEC 8882-3:2000(E) Foreword IS0 (the International Organization for Standard

11、ization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that are members of IS0 or IEC participate in the development of International Standards through technical committees established by the respective organization

12、 to deal with particular fields of technical activity. IS0 and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with IS0 and IEC, also take part in the work. International Standards are drafted in acco

13、rdance with the rules given in the ISOIIEC Directives, Part 3. In the field of information technology, IS0 and IEC have established a joint technical committee, ISOIIEC JTC 1. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publica

14、tion as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this part of ISOIIEC 8882-3 may be the subject of patent rights. IS0 and IEC shall not be held responsible for identifying an

15、y or all such patent rights. International Standard ISOIIEC 8882-3 was prepared by Joint Technical Committee ISOIIEC JTC 1, Information technology, Subcommittee SC 6, Telecommunications and information exchange between systems. This third edition cancels and replaces the second edition (ISOIIEC 8882

16、-3: 1995), which has been technically revised. ISOIIEC 8882 consists of the following parts, under the general title Information technology - Telecommunications and information exchange between systems - X.25 DTE conformance testing: - Pari i: Generalprinciples - Pari 2: Data link layer conformance

17、test suite - Pari 3: Packet layer conformance test suite Annex A forms a normative part of this part of ISOIIEC 8882. iv O ISOIIEC 2000 -All rights resewed STD-IS0 8882-3-ENGL 2000 4853903 O832346 T82 ISOIIEC 8882-3:2000(E) Introduction This part of ISOIIEC 8882 specifies a set of tests to evaluate

18、Data Terminal Equipment (DTE) conformance to International Standards IS0 7776:1986, IS0 7776:1995 (X.25 LAPE) andlor IS0 8208:1987, IS0 8208:1990, IS0 8208:1995 (X.25 Packet Layer). IS0 7776 (1986,1995) and IS0 8208 (1987,1990, 1995) allow for a DTE to interface with a Data Circuit-Terminating Equip

19、ment (DCE) conforming to CCITT respectively ITU-T Recommendation X.25 or to another DTE conforming to IS0 7776 (1986,1995) and/or IS0 8208 (1987,1990. 1995) also allows for connection to Local Area Networks. CCITT respectively ITU-T Recommendation X.25 1980, X.25 1984, X.25 1988 and X.25 1993 are wr

20、itten from the perspective of a DCE and therefore do not explicitly specify the DTE operation. However, recommended operation of DTEs is included by implication because of the need to communicate with X.25 DCEs. Tests within this part of ISOIIEC 8882 pertaining to X.25 1980, X.25 1984, X.25 1988 and

21、 X.25 1993 are based on the DTE operational characteristics implied by CCITT X.25 respectively ITU-T X.25. This part of ISOIIEC 8882 presents the packet layer aspects for evaluating conformance to IS0 8208 (1987, 1990, 1995) and follows the procedures and guidelines defined in ISOIIEC 9646. Where it

22、 is claimed that X.25 is used to provide the OS1 Network Layer Service, the conformance tests as defined in this part of ISOIIEC 8882 can be used to verify the implementation of the necessary protocol elements. The test suite is presented in an abstract form by means of the test case notation TTCN,

23、as defined in ISOIIEC 9646-3. This is an abstract set of tests. Not every test applies to every public network or every type of DTE. O ISOAEC 2000 -All rights reserved V STD.IS0 8882-3-ENGL 2000 m 4851903 0832347 917 m INTERNATIONAL STANDARD ISOAEC 8882-3:2000(E) Information technology - Telecommuni

24、cations and information exchange between systems - X.25 DTE conformance testing - Part 3: Packet layer conformance test suite 1 Scope This part of ISOIIEC 8882 specifies a set of abstract tests for verifying that the implementation of X.25 protocols for use by Data Terminal Equipment (DTE), conforms

25、 to the requirements of International Standards that specify those protocols. Testing of a DCE is not subject of this test suite. Testing of a DTE in DCE mode is covered in test group 28 of this test suite a) specifies a PIXIT proforma; b) c) d) describes the relationship of the PICS to the test sui

26、te, describes the relationship of the PIXIT to the test suite, specifies a set of abstract tests using TTCN Graphical notation. This part of ISOIIEC 8882 defines the testing of a DTE operating at the packet layer designed to access a public or private packet-switched network conforming to CCIlT resp

27、ectively ITU-T Recommendation X.25 (1980, 1984, 1988, 1993) or another DTE conforming to IS0 8208. The specification of test cases in executablelmachine processable TTCN is outside the scope of this part of ISOIIEC 8882. 2 Normative references The following standards contain provisions which, throug

28、h reference in this text, constitute provisions of this part of ISOIIEC 8882. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISOIIEC 8882 are encouraged to investigate the possibility of applying t

29、he most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. ISOIIEC 7498-1 :I 994, Information technology - Open Systems Interconnection - Basic Reference Model: The Basic Model. (See also ITU-T Recornmendation X.200

30、) ISOIIEC 7776:1995, Information technology - Telecommunications and information exchange between systems - High-level data link control procedures - Description of the X.25 LAPB-compatible DTE data link procedures. ISOIIEC 8208:1987, Information processing systems - Data communication - X.25 Packet

31、 Layer Protocol for Data Terminal Equipment. ISOIIEC 8208:1990, Information technology - Data communication - X.25 Packet Layer Protocol for Data Terminal Equipment. ISOIIEC 8208:1995, Information technology - Data communication - X.25 Packet Layer Protocol for Data Terminal Equipment. ISOIIEC 8824:

32、 1990, Information technology - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN. I. ISOIIEC 8882-1 :1996, Information technology - Telecommunications and information exchange between systems - X.25 DTE conformance testing - Part 1: General principles. ISOIIEC 8886:1

33、992, Information technology - Telecommunications and information exchange between systems - Data link service definition for Open Systems Interconnection. ISOIIEC 9646-1 :I 994, Information technology - Open Systems Interconnection - Conformance testing methodology and framework- fart 7: General con

34、cepts. (See also ITU-T Recommendation X.290) O ISO/IEC 2000 -All rights reserved 1 STD-ISO 8882-3-ENGL 2000 4853903 0832348 855 ISOIIEC 8882-3:2000(E) ISOIIEC 9646-2: 1994, Information technology - Open Systems Interconnection - Conformance testing methodology and framework - fart 2: Abstract Test s

35、uite Specification. (See also ITU-T Recommendation X.291) I Soll EC 9646-3: I 998, Information technology - Open Systems Interconnection - Conformance testing methodology and framework - fart 3: The Tree and Tabular Combined Notation (TEN). ISOIIEC 9646-4:1994, Information technology - Open Systems

36、Interconnection - Conformance testing methodology and framework - fart 4: Test realization. (See also ITU-T Recommendation X.293) ISOII EC 9646-51 994, Information technology - Open Systems Interconnection - Conformance testing methodology and framework - Part 5: Requirements on test laboratories an

37、d clients for the conformance assessment process. (See also ITU-T Recommendation X.294) CCIlT Recommendation X.25 (I 980), X.25 (I 984), and X.25 (I 988), Interface between Data Terminating Equipment (0 JE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode on th

38、e public data networks. ITU-T Recommendation X.25 (1 993), lnterface between Data Terminating Equipment (D JE) and Data Circuit-terminating Equipment (DCE) for terminals operating in the packet mode and connected to the public data networks by dedicated circuit. 3 Terms and definitions 3.1 Reference

39、 model terms This part of ISOIIEC 8882 makes use of the following term defined in IS0 7498. a) (N)-protocol-data-unit (N-PDU) 3.2 Conformance testing terms This part of ISOIIEC 8882 makes use of the following terms defined in ISOIIEC 9646 Abstract Test Suite Conforming System or Implementation Confo

40、rmance Test Suite Conformance Testing Executable Test Suite Postamble Preamble Protocol Implementation Conformance Statement Protocol Implementation extra Information for Testing Test Group Test Step Test Suite 3.3 X.25 DTE conformance testing terms This part of ISOIIEC 8882 makes use of the followi

41、ng terms defined in ISOIIEC 8882-1. a) Improper PDU b) Inopportune PDU c) ProperPDU d) Test Subgroup e) Test Selection 9 Tester g) Transient States 2 O ISOIIEC 2000 -All rights reserved - STD.ISO 8882-3-ENGL 2000 4851903 0832347 771 9 ISOIIEC 8882-3:2000(E) 3.4 Additional terms and definitions For t

42、he purposes of this part of ISOllEC 8882, the following terms and definitions apply. 3.4.1 proper packet packet that is a proper PDU 3.4.2 improper packet packet that is an improper PDU 3.4.3 inopportune packet packet that is an inopportune PDU 4 Abbreviations The following abbreviations are used in

43、 this part of ISOIEC 8882. ADX Address ASP Abstract Service Primitive ATS Abstract Test Suite ETS Executable Test Suite FAC Facility IUT Implementation Under Test LCI Logical Channel Identifier LEN Length PCO Point of Control and Observation PDU Protocol Data Unit PICS Protocol Implementation Confor

44、mance PIXIT Protocol Implementation extra Information for Testing PKT Packet PLG Packet Layer Group RX Receive TST Tester TX Transmit UDF User Data Field 5 Conformance The test realizer shall comply with the requirements of ISOIIEC 9646-4. In particular, these concern the realization of an ETS based

45、 on the ATS. Test laboratories running conformance test services for this abstract test suite shall comply with ISOAEC 9646-5. 6 Test suite information 6.1 Packet layer test suite structure The packet layer tests are grouped as shown in Table 1. Q ISO/IEC 2000 -All rights reserved 3 STD-IS0 8882-3-E

46、NGL 2000 4853903 0832350 403 ISOllEC 8882-3:2000(E) Test Group # Packet layer test Test group # Packet layer test groups groups Ready Request 1 RI - Packet Layer 15 12 - DTE Interrupt Sent 2 R2 - DTE Restart 16 JI - DXE Interrupt Ready 3 R3 - DXE Restart Ind 17 J2 - DXE Interrupt Sent i 4 PI - Ready

47、 18 FI - DXE Receive Ready 5 6 P2 - DTE Call Request P3 - DXE Incomina Call 20 GI - Receive Readv 19 F2 - DXE Receive Not Ready I 7 I P4-DataTransfer I 21 I G2 - DTE-Receive Not Readv a I 8 9 10 11 12 13 14 P5 - Call Collision 22 Data Transfer P6 - DTE Clear Request 23 Timer Tests P7 - DXE Clear 24

48、Address DI - Flow Control 25 Facility D2 - DTE Reset 26 Registration Indication Ready Request D3 - DXE Reset Ind 27 Multiple Logical Channel Asg Il - Interrupt Ready 28 DTWDTE Tests a This group has been deleted, but the number has been retained for consistency. I For each test group that tests a pa

49、cket layer state (PLGI through PLG28) the test cases specified are categorized into the following three subgroups. Subgroup I contains test cases in which the Tester transmits a proper test packet, these test cases are identified with a one hundred series test case identifier xx-lxx. Subgroup 2 contains test cases in which the Tester transmits an improper test packet, these test cases are identified with a two hundred serles test case identifier xx-2. Subgroup 3 contains test cases in which the Tester transmits an inopportune test packet, these test cases ar