VSI OpenVMS VSI X.25 for OpenVMS Management Guide Document Number: DO-DX25MG-01A Publication Date: August 2018 Revision Update Information: This is a new manual. Operating System and Version: VSI OpenVMS Integrity Version 8.4-2 VSI OpenVMS Alpha Version 8.4-2L1 Software Version: VSI X.25 for OpenVMS Version 2.1 VMS Software, Inc. (VSI) Burlington, Massachusetts, USA VSI X.25 for OpenVMS Management Guide Copyright © 2018 VMS Software, Inc. (VSI), Burlington, Massachusetts, USA Legal Notice Confidential computer software. Valid license from VSI required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license. The information contained herein is subject to change without notice. The only warranties for VSI products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. VSI shall not be liable for technical or editorial errors or omissions contained herein. HPE, HPE Integrity, HPE Alpha, and HPE Proliant are trademarks or registered trademarks of Hewlett Packard Enterprise. The VSI OpenVMS documentation set is available on DVD. ii VSI X.25 for OpenVMS Management Guide Preface ................................................................................................................................... vii 1. About VSI .................................................................................................................... vii 2. Intended Audience ........................................................................................................ vii 3. Document Structure ...................................................................................................... vii 4. Associated Manuals ..................................................................................................... viii 5. VSI Encourages Your Comments .................................................................................... ix 6. Terminology ................................................................................................................... x 7. Conventions .................................................................................................................... x Chapter 1. Introduction ........................................................................................................ 1 1.1. Facilities Provided by X.25 for OpenVMS .................................................................... 1 1.1.1. Management ...................................................................................................... 1 1.1.2. Security ............................................................................................................ 1 1.1.3. Accounting ........................................................................................................ 2 1.1.4. X.25 and X.29 Programming ............................................................................. 2 1.1.5. X.29 Access ...................................................................................................... 2 1.1.6. X.25 Mail ......................................................................................................... 3 1.1.7. Common Trace Facility (CTF) ........................................................................... 3 1.2. Introduction to X.25 Management ................................................................................. 3 1.3. How to Use this Manual .............................................................................................. 4 Part I. Conceptual Information Chapter 2. The X.25 Management Model ........................................................................... 7 2.1. Introduction ................................................................................................................. 7 2.2. Modules Used in an X.25 for OpenVMS System ........................................................... 7 2.3. Entities ........................................................................................................................ 8 2.3.1. Device .............................................................................................................. 8 2.3.2. Modem Connect ................................................................................................ 9 2.3.3. LAPB ............................................................................................................... 9 2.3.4. CSMA-CD or FDDI .......................................................................................... 9 2.3.5. LLC2 ................................................................................................................ 9 2.3.6. XOT (OpenVMS I64 and OpenVMS Alpha) ..................................................... 10 2.3.7. X25 Protocol ................................................................................................... 10 2.3.8. X25 Access ..................................................................................................... 10 2.3.9. X25 Server ...................................................................................................... 11 2.3.10. X25 Client ..................................................................................................... 11 2.3.11. X25 Relay (OpenVMS I64 and OpenVMS Alpha) ........................................... 11 2.4. Modules and Entities Used in Each Type of X.25 System ............................................. 12 2.5. Example Configurations ............................................................................................. 13 2.5.1. X.25 Client System Configuration .................................................................... 13 2.5.2. X.25 Direct Connect System Configuration ....................................................... 14 2.5.3. Connector System Configuration ...................................................................... 18 2.5.4. X.25 Relay System (OpenVMS I64 and OpenVMS Alpha) ................................ 19 2.5.5. Combination Systems ...................................................................................... 21 Chapter 3. The Components of an X.25 for OpenVMS System ..................................... 23 3.1. Summary of Call Handling ......................................................................................... 23 3.1.1. Making a Call from a Direct Connect System ................................................... 24 3.1.2. Receiving a Call on a Direct Connect System ................................................... 24 3.1.3. Making a Call from a Client System ................................................................. 25 3.1.4. Receiving a Call on a Client System ................................................................. 25 3.2. DTE Classes, DTEs, Links, and Lines ......................................................................... 26 iii VSI X.25 for OpenVMS Management Guide 3.2.1. DTE Classes .................................................................................................... 27 3.2.2. DTEs .............................................................................................................. 29 3.2.3. LAPB Links .................................................................................................... 32 3.2.4. Physical Synchronous Communication Lines .................................................... 33 3.2.5. LLC2 Links ..................................................................................................... 34 3.2.6. LAN Stations .................................................................................................. 35 3.2.7. XOT Links (OpenVMS I64 and OpenVMS Alpha) ........................................... 36 3.2.8. PVCs .............................................................................................................. 37 3.2.9. Groups ............................................................................................................ 38 3.3. Templates ................................................................................................................... 38 3.3.1. Predefined Templates ....................................................................................... 41 3.3.2. Designing Templates ........................................................................................ 42 3.4. Application Filters ...................................................................................................... 44 3.4.1. How Filters Are Used ...................................................................................... 46 3.4.2. Predefined Filters ............................................................................................ 46 3.4.3. Designing Filters ............................................................................................. 47 3.5. Server–Client Filters ................................................................................................... 49 3.5.1. Designing Server–Client Filters ........................................................................ 49 3.6. X.25 Applications ...................................................................................................... 50 3.6.1. Designing Applications ...................................................................................