Transport Level L4 | HP General IO Connectivity guide

About the X.25 Product

Transport Level (L4)

Transport Level (L4)

At the transport level (level 4), the X.25 link provides TCP (based on the DARPA standard) and UDP. These Transport level protocols are used by Internet/Berkeley Services, by NS, and by user application programs that access the TCP/UDP and IP protocols.

The TCP protocol is a connection-based protocol. TCP verifies that all data is delivered without duplication to its destination. The UDP protocol, unlike TCP, has no concept of a connection. Messages are sent as a unit with source and destination information in the header.

The X.25 link provides a BSD to PLP (Packet Level Protocol) translator to allow access to PLP at level 3 for user-written application programs via BSD IPC.

The X.25 link also provides an OTS to PLP translator to allow access to PLP at level 3 for OSI Services via Xport OSI.

Chapter 1

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HP General IO Connectivity manual Transport Level L4

Contents

Manufacturing Part Number J2793-90073 E0607 Edition Legal Notices Contents Diagnostic Utilities PAD Services Tracing and Logging Utilities SUsing Non-English Subscription Forms Diagnostic Messages Tables Tables Tables Tables Figures Figures About the X.25 Product Introduction BSD IPC TCP/UDP Link Architecture Application L7, Presentation L6, Session L5 Levels Transport Level L4 Packet/network Level L3 Data link L2 and Physical L1 Levels Data link L2 and Physical L1 Levels Chapter Installation Hardware Compatibility Before you Install the softwareInstalling Multiple X.25 Interface Cards Hardware Requirements Memory OS Platform and Version CompatibilityRelated Parameters Example TM = 9,123,840 8.7 Mb Software Requirements Step Installing the X.25 Link Software Installing the X.25 Link Software Chapter Configuration Using SAM Configuring the X.25 Link Using SAM’s On-line Help Configuring an X.25 Address Field Descriptions Configuring X.25 Virtual Circuits VCs Configuring an Internet Address Configure Internet Address IP Address and Default Subnet Masks Class Configure Internet Address Field Descriptions IP Address Class Default Subnet Mask IP Address and Default Subnet MasksModify IP Over X.25 Defaults Verifying Level 3 Values Modify IP over X.25 Defaults Field Descriptions Verify Level 3 Values Field Descriptions Verify Level 3 Values Default is Modulo-8 Permanent VC Flow Control Field Descriptions Switched VC Flow Control Field Descriptions Configuring the X.25 Link Throughput Classes and Line Speeds Verifying Level 2 Values Settings for your configuration Verify Level 2 Values Field Descriptions Using Maximum Window-Size Settings with Modulo-128 Level 3 Packet Level 2 Window Size Recommended Maximum Window Sizes Configuring Remote System Access Add Internet Connectivity Dialog Add Internet Connectivity Field Descriptions X25init -cconfigurationfile-a ipmapfile Provide X.25 Information Field Descriptions Internet Addresses & Routes object list. SAM updates Configuration Files Configuring X.25 over LLC2 Additional XOL specific configuration parameters Patch requirements for the XOL HA feature and configurableField Format Value Xoldsap Devicelan00x7c Lanboxid Lanboxaddr 0x080009c4728a 0x7e Example 3-3 LLC2 Configuration Ccitt Run the following command at the Cisco console Step Run the following command at the Cisco console Starting and Stopping Configuration One Lan and Two Boxes configuration Sample setup and Configuration 11 One LAN, Two Boxes Configuration To connect Host to BOX To connect Host to BOX To Connect Box 1 to Host Configuring Two Lans, with One Box Per Lan To Start and Stop above configuration To configure Host to LAN 1 to BOX To Connect Box 0 to Host To Connect Box 1 to Host Troubleshooting LLC2 Configuration Add/Modify PAD Terminal Emulation Local to Configuring PAD ServicesRemote Add/Modify PAD Support Server Remote to Local Add/Modify Uucp Server Add/Modify PAD Printers Server Add/Modify X.3 Parameters PAD. As the terminal characteristics of your session change, Configuring the High Availability Feature Cluster Definition Commands to be Configured in High Availability Packages Example 3-4 One Example of Remote Failure High Availability Configuration $ x25check Checking the Configuration X25check 250207 -i interface0p2 Unique MAC Address Requirement Configuring the High Availability Feature for X.25 over LLC2 Local Failover Configuring XOL HA for Local Failover Without ServiceGuard 13 Before the Failover After the Failover Example Configuring Standby Device and Unique MAC Address Remote Failover Configuring XOL HA for Remote Failover Using Service Guard 15 Before the Failover XOL Cluster Definition Commands Used in the SG Package Control Scripts XOL Package Definition Example 3-6 XOL SG package for remote failover Service Guard Remote Failover with Local Failover Support Using Then, the above parameters take the following values Example Remote Failover with Local Failover support # Service Names and Commands Configuring the High Availability Feature for X.25 over LLC2 Ping Verifying the X.25 Link 100 OLA/R Overview and Concepts 102 Terms used in this section Meaning Important Terms and Concepts On-Line Addition On-Line ReplacementPlanning and Preparation Card Compatibility Critical Resources Failover Actions / Single Points of Failure Disconnect messages. The connections will have to be How to On-line Replace OLR a J3525A orJ3526A PCI Card using SAM Interface card under consideration will be stopped before Screen Buttons Outcome Activate User Actions Displays Three Possible Critical Resource Analysis CRA Outcomes Chapter 109 110 PCI Card using SAM How to On-line Add OLA a J3525A or J3526A 112 Chapter 113 114 Diagnostic Utilities Available Diagnostic Utilities Utility Description Refer to Using Diagnostic Utilities Psidad Scope of X.25 Diagnostic Utilities Before Using the Diagnostic Utilities Example 1 Running x25check Interactively No Parameters X25check and x25server 120 Example 3 Running x25check With a Data Packet Example 2 Running x25check With an X.121 Address X25stat Example 1 Displaying the Current Configuration X25stat -d X25stat -g -d Example 2 Displaying Global Statistics Level 3 State Output on Screen Description/Meaning Diagnostic Utilities x25stat Level 2 Link State Output on Screen Description/Meaning Level 3 State Level 1 Link State Output on Screen Description/Meaning Counters Example 3 Displaying Virtual Circuit Data PacketVC State Output on Screen Description/Meaning Example 5 Displaying X.25 Level 1 and 2 Statistics Example 4 Displaying Global X.25 Level 3 StatisticsVC State Chapter 129 Example 6 Displaying Virtual Circuit Status X25stat -a Example 7 Displaying Current IP to X.25 Address Mapping Example Statistics for x25mibstat X25mibstat Option Remark X25mibstat PAD Services Ccitt Recommendations PAD Support Protocols PAD services and the HP 9000 host Remote PAD Support x29server PAD Services as a PipeOverview Call Acceptance Mechanism and System Security Remote PAD Support 0x01000000 Configuring padspt Parameters Configuring Remote PAD SupportSupported Remote PAD Terminals Padspt Parameters Chapter 141 Launching Applications Automatically Remote PAD Printer Support x29printd Remote PAD Printer Support x29printd Remote Printer Support System Requirements Configuring Remote PAD Printers 146 Configuring the Unix Line-printer Spooler for x29printd Examples Printer ConfigurationX29printd and lpsched Operation Verifying the Configuration Uucp Support x29uucpd Receiving HP Configuring Uucp PAD Support Configuring the x29hosts file File ContentsPaduucp Parameters Chapter 153 At the dave system Configuring System and Device Files for Uucp Chapter 155 At the bill system Chapter 157 158 Chapter 159 Local PAD Emulation padem Command Mode Configuring Local PAD Emulation Data Transfer ModeParameter Descriptions 162 Chapter 163 PAD Command Set PAD Commands Extended Command Set 166 Configuration Set Syntax Configuring X.3 Profile Parameters Parameter Values Modifying Parameters Parameter Descriptions Default X.3 Parameters Value Meaning Parameter Description Chapter 171 172 Value Baud Rate 174 Chapter 175 176 Chapter 177 178 Tracing and Logging Utilities 180 Scope of X.25 Tracing and Logging Utilities Syntax NettlParameters 0x20000000 Tracing Masks Keyword a0x80000000 0x40000000 184 Chapter 185 Netfmt 186 Filter File Syntax Creating a Filter File Filter Filter File Options System/subsystem Type Value Level Chapter 189 Filter File Examples Chapter 191 Strace 7030 Chapter 193 7030 + 1 = Output Format Frame Type Parameters Displayed Packet Type Parameters Displayed Examples of the strace Command Record Time Tics Pri Ind Mod Sub Data Num Examples of strace Output 198 Strerr 200 Troubleshooting Troubleshooting Commands Purpose Refer to Troubleshooting Your X.25 Link Troubleshooting Commands Troubleshooting Flowcharts and Procedures Flowchart Flowchart 2 Procedures and Notes Chapter 205 See Note Flowchart 2 Initialization Check Flowchart 3 Hardware and License Check Flowchart 3 Procedures and Notes Flowchart 4 Procedures and Notes Flowchart 4 X.25 Configuration Check Flowchart 5 Procedures and Notes 210 Flowchart 5 IP Over X.25 Check For Systems With a Backup Power Supply Recovering From a Power FailureFor Systems With No Backup Power Supply Reporting Problems 214 Host Back-to-back Configuration on the Same Host 216 Command Summary Configuration and Troubleshooting Commands 218 IP-to-X.121 Address Mapping Table Examples of x25init Syntax for PVCs Syntax for SVCs File Mapping Parameters 222 Chapter 223 224 Using Non-English Subscription Transpac Subscription Form Translations Itapac Table A-1 French Transpac Subscription Form Throughput Class Setting Table A-2 Using Your Itapac Italian Subscription Form Table A-4 Using your Iberpac Spanish Subscription Form 230 Configuration Files Table B-1 Etc/x25 directory Configuration FilesTable B-2 Etc directory Table B-4 Table B-3 Var/x25/log/x25server directoryTable B-5 X25initdef File Example FilesTable B-6 Appendix B 235 236 Table B-7 X25initsmpl File 238 X3config File 240 Example Files Appendix B 241 Table B-8 X29hosts File Network Type File x25networks Table B-9 Diagnostic Messages Appendix C Diagnostic Message Example Cause Code Settings Packet Codes RESET/CLEAR Packet CodesRestart Packet Codes Explanation Diagnostic MessagesTable C-1 No Additional Information Diagnostic Table C-2 Packet Type Invalid Diagnostic Table C-2 Packet Type Invalid Table C-3 Packet Not Allowed Diagnostic LCI Table C-3 Packet Not Allowed Incoming Table C-4 Timer Expired Diagnostic Table C-4 Timer Expired Appendix C 255 256 Appendix C 257 Table C-7 International Problem and Maintenance Diagnostic Table C-6 Category Miscellaneous Diagnostic Table C-8 DTE-Specific Signals Diagnostic Table C-7 International Problem and Maintenance Table C-9 OSI Network Service Problem Diagnostic Table C-8 DTE-Specific Signals Nsap Table C-9 OSI Network Service Problem Table C-10 Higher Level Initiated Diagnostic Table C-10 Higher Level Initiated 264 Index Symbols 266 267 268 269