Contents

Part 1. Getting started with AS/400 communications

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Chapter 1.

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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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IBM AS/400 manual Contents

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.