IBM AS/400 manual Contents

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Contents

Part 1. Getting started with AS/400 communications

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Chapter 1.

Print this topic

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Chapter 2.

Configuring AS/400 for communications . . . .

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Creating a network interface description

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Creating a network server description

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Creating a line description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 3. Optimizing communications performance

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Improving wide area network performance

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Adjusting WAN protocols for optimum AS/400 performance

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Adjusting the WAN line speed for optimum AS/400 performance

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WAN line speed considerations for IOPs

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Improving local area network performance

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Adjusting LANs for optimum communications performance

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Adjusting LAN lines for optimum communications performance

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LAN line speed considerations for IOPs

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Improving data path performance

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Considerations for subsystem configuration for error recovery performance

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Communications performance considerations for interactive jobs

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Communications performance considerations for batch jobs

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Mixing interactive and batch jobs on a WAN line

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Performance considerations for AnyNet communications

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Subsystems

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Chapter 4. Communications applications

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User written APPC applications

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Distributed data management (DDM)

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Application program interface (API) performance considerations

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Performance considerations for intersystem communications function

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Performance considerations for Common Programming Interface Communications

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Chapter 5. Communicating with host systems

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Matching AS/400 parameters for a host system

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Matching AS/400 line description parameters for a host system

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Matching AS/400 controller description parameters for a host system

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Matching AS/400 device description parameters for a host system

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Matching AS/400 mode and class-of-service description parameters for a host system . . . . . . 25

Configuring dependent LU requester (DLUR)

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Configuring the host controller description

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Configuring the device descriptions . . . . . . . . . . . . . . . . . . . . . . . . . 31

Chapter 6. Communicating with a remote AS/400 system

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Matching AS/400 line description parameters for a remote AS/400 system . .

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Matching AS/400 controller description parameters for a remote AS/400 system

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Matching AS/400 device description parameters for a remote AS/400 system .

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Connecting one AS/400 to another AS/400 system

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Chapter 7. Communicating with remote workstation controllers

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Matching AS/400 parameters for 5494 controllers

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Matching AS/400 parameters for a 5494 connected by token-ring

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Matching AS/400 parameters for a 5494 connected by Ethernet

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© Copyright IBM Corp. 1998, 2001

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Contents ERserver Page ERserver Page Contents Troubleshooting communications problems Part 1. Getting started with AS/400 communications Version Print this topic Version Creating a network interface description Configuring AS/400 for communicationsCreating a network server description Creating a line descriptionVersion Adjusting the WAN line speed for optimum AS/400 performance Adjusting WAN protocols for optimum AS/400 performanceOptimizing communications performance Improving wide area network performanceWAN line speed considerations for IOPs Improving local area network performance Adjusting LANs for optimum communications performanceAdjusting LAN lines for optimum communications performance Improving data path performance LAN line speed considerations for IOPsAddcmne SBSDlibname/sbsname DEVdevname* MODEmodename Set up the communication entries Example Communications subsystem configurationMixing interactive and batch jobs on a WAN line Example Interactive subsystem configurationCommunications performance considerations for batch jobs AnyNet communications for the AS/400 system Setting up the AnyNet environmentPerformance considerations for AnyNet communications Qusrwrk SubsystemsVersion Distributed data management DDM Communications applicationsUser written Appc applications Version Communications applications Version Matching AS/400 parameters for a host system Communicating with host systemsSSAP/DSAP/remote-adapter-address Name Rmtcpname Vtamlst Sscpname Maxframe Group MaxdataRmtnetid Vtamlst Netid Ssap SapaddrLcllocname Dfhtct Netname Mode Modeent LogmodeLocadr Locaddr Locpwd Dfhtct BindpwdAS/400 Host Definition AS/400 Prompt Examples Connecting AS/400 to a host systemModd Modeent Logmode Cosd Modeent COSCommunicating with host systems Version Communicating with host systems Version Configuring the device descriptions Configuring dependent LU requester DlurConfiguring the host controller description Version AS/400 Remote AS/400 AS/400 Prompt Communicating with a remote AS/400 systemAdptadr AdrinsertAS/400 Remote AS/400 AS/400 Prompt Parameter Cnnnbr Netadr X25DCECnnpwd Dsap SsapLinkpcl InlcnnRmtcpname Lclcpname Rmtnetid LclnetidConnecting one AS/400 to another AS/400 system Version Communicating with a remote AS/400 system Version Matching AS/400 parameters for 5494 controllers Communicating with remote workstation controllersLAN AS/400 5494 Prompt AS/400 Parameter Field Subfield ValueRmtcpname RmtnetidLinktype LAN AS/400 5494 Prompt AS/400 Parameter Field SubfieldMatching AS/400 parameters for a 5494 connected by Ethernet AS/400 5494 Prompt Parameter Field Subfield Value Version LAN Adptadr Matching AS/400 parameters for a 5494 connected by Sdlc Prompt Parameter Field Subfield AS/400 Value AS/400Field Subfield AS/400 Value Communicating with remote workstation controllers Matching AS/400 parameters for a 5494 connected by Linktype Example Connecting AS/400 to a 5494 controller connected byIBM 5494 Remote Control Unit Planning Guide, GA27-3936 Linkpcl Qllc DftpktsizeEllc NetlvlField Subfield Value AS/400 5494 PromptCommunicating with remote workstation controllers Matching AS/400 parameters for 3x74 controller 3174 AS/400 Configuration PromptMatching AS/400 parameters for a 3174 controller Questions3174 AS/400 Configuration Prompt Parameter Questions Matching AS/400 parameters for a 3274 controller Switched Short-Hold ModeNRZ or Nrzi Encoding Control Unit AddressPrompt Parameter Number Example Connecting an AS/400 to a 3174 control unit3274 AS/400 Matching AS/400 parameters for 470x finance controllers Matching AS/400 parameters for finance controllersAS/400 AS/400 Prompt Parameter Macro Macro Parameter Matching AS/400 parameters for Fbss finance controllersAS/400 AS/400 Prompt Service access point for PC Switched lineLine mode PC addressIdentification block and Identification number Service access point for Host/37xx/4700Matches the Fbss Identification number Data Link ControlMatching AS/400 parameters for retail controllers Example Connecting AS/400 to a finance networkAS/400 Definition AS/400 Prompt Parameter Statement Matching AS/400 parameters for 3651 retail controllersAS/400 Parameter Sdlclin Bit Bit Value AS/400 Definition AS/400 Prompt3684 AS/400 Definition Prompt Matching AS/400 parameters for 3684 retail controllers3684 AS/400 Definition Prompt Parameter AS/400 Parameter Linecon Bit Bit Value Matching AS/400 parameters for 4680/4690 Line parameterCNN*MP SNBU*NO SNBU*YES MODEMRATE*FULLMatching AS/400 parameters for 4680/4690 Link parameter Exchid parameter specified on the AS/400 Crtctlrtl commandAS/400 Prompt AS/400 Parameter Line Parameter CNNMatching AS/400 parameters for 4684 retail controllers Wire constant RTS?Local node Hex Remote node HexExamples Connecting AS/400 to a 4690 retail controller Version Communicating with remote workstation controllers Version Displaying message queues to solve communication problems Troubleshooting communications problemsQsysarb Job logs and communication problemsQpasvrp Solving communication problems using communications traceTrace option setting System service tools and communication problemsTrace full Solving communication problems using the system problem logConsiderations for system tuning during error recovery Solving communication problems using status informationUsing error messages to aid in error recovery Solving communication problems using reason codesReason Code Reason Description Reason Codes for Rejected Program Start RequestsReason Code Reason Description Advanced Peer-to-Peer Networking Networking conceptsDependent LU requester support Advanced program-to-program communicationsInternetwork packet exchange support High-performance routingHPR architecture option sets What is TCP/IP What is Systems Network ArchitectureLocal area network standards Common networking standardsATM on AS/400 Distributed data interface networkToken-ring networks Wireless networkAsynchronous communications Wide area network standardsBinary synchronous communications Frame relay networksIsdn data link control network Integrated services digital networkSynchronous data link control network Network Version
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AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.