The following APARs have been sysrouted to VSE VTAM. It is recommended that VSE VTAM customers, especially those using or migrating to functions such as APPN or DLUR/DLUS, apply this maintenance as soon as possible to bring their systems to the most current level.

Changes to the VTAM Network Implementation Guide Version 4 Release 2 for MVS, VM, and VSE (SC31-6494-01) that are applicable to VSE.

The focus of this IBM Redbook is networking infrastructure aspects of modernizing an SNA network environment. Additionally, modernizing SNA concerns itself with how to modernize access to existing SNA core business applications. In order to provide a reference model for modernizing SNA, this book introduces a selected set of SNA application access modernization technologies, which go beyond the normal networking infrastructure. Some of the technologies discussed in this book aim at improving the user experience when accessing traditional SNA 3270 applications and at exposing existing mainframe SNA applications as Web services. Such technologies will primarily be introduced from a network topology and connectivity perspective. While a description of the full set of capabilities of such technologies is beyond the scope of this document, readers can refer to other technology-specific and product-specific documentation from IBM and other vendors for that information. The intended audience for this book are IBM System z technical managers, system architects, and network administrators who are responsible for setting the overall strategic directions for an enterprise networking infrastructure. This infrastructure includes Systems Network Architecture (SNA) and Internet Protocol (IP) networking technologies, branch or remote location access networks, data center connectivity, and business partner connectivity.

This redbook contains matrices and listings that document the compatibility and function of various IBM communications related software and hardware products, such as CS for z/OS, SecureWay, WebSphere, Tivoli, TCP/IP, e-business software, PC software, OSA adapters, Network Attached Storage, IP Storage, NCP, and the 3745/46. It is intended to provide a concise reference for software and hardware planning. This redbook does not cover AS/400 and AIX products. This redbook does not replace standard IBM publications but should be used in conjunction with them.

The Parallel Sysplex is the latest development in the evolution of IBM's most powerful systems. It provides unparalleled throughput, reliability, manageability and expandability through its use of cooperating coupled processors. These advantages are exploited to the fullest by VTAM and VTAM applications, to bring unequalled levels of service to SNA network users. This redbook tells you how to implement a VTAM-based network on a Parallel Sysplex. We show how the use of generic application resources allows you to balance the load on a Parallel Sysplex, and to provide greater availability to application users. We demonstrate how a VTAM session can survive a failure of application, VTAM, MVS or even a processor, without the user having to log on again. We describe how VTAM systems in a Parallel Sysplex can establish communication with each other dynamically, without any definitions being required. We discuss and illustrate how to ensure that sessions to

ACF/VTAM V4R4 for OS/390 and MVS/ESA introduces major improvements in function, availability and performance. This redbook helps you to implement them by: - describing and positioning each new feature - pointing out pitfalls you may encounter - giving practical examples showing how we made the features work. We show how VTAM can improve reliability in an SNA network by its extensive support for High-Performance Routing (HPR). We demonstrate HPR across subarea connections, HPR across network borders, HPR on an interchange node and HPR used for CP-CP sessions. We illustrate how VTAM's new multiprotocol DLC, High-Performance Data Transfer, can provide performance gains across high-speed connections such as channel links. We also detail the new adaptive pacing methods VTAM uses to improve performance still further. We show how VTAM systems can communicate using Asynchronous Transfer Mode (ATM), with the unique ability for the application program to specify the level of service required. ATM allows multimedia and other applications with very strict service level requirements to communicate efficiently across public and private networks. We describe how an SNA session can survive a failure in the application, in VTAM, in MVS or even in the processor itself, using a combination of HPR and Parallel Sysplex. This function is called multinode persistent sessions. We describe how VTAM systems in a Parallel Sysplex can establish communication with each other without requiring any dedicated channel connections or

This publication explains how to configure APPC and APPN on a variety of system platforms. It describes the steps needed to configure APPC and APPN, it explicitly states which values in one computer's configuration need to match values in a partner computer's configuration, and clarifies the terminology differences between computers by mapping to a set of standard terms and confining platform-specific terms to the chapter that describes that platform.

This document provides information to ease the installation and use of IBM TCP/IP V2R2 for VM. It focuses on how IBM TCP/IP V2R2 for VM can be used to interoperate in different environments. This document is intended for the customers and the systems engineers who will evaluate the product possibilities and install the product. The book is organized to help you understand the architecture of IBM TCP/IP V2 for VM, the new functions and enhancements brought by V2R1 and V2R2, and the requirements and guidelines for its installation and tailoring. Each TCP/IP server is discussed and sample configuration files are provided to help you in your system customization. The reader is assumed to have a basic knowledge of the TCP/IP protocol suite and be familiar with the VM and SNA architectures and products.