For more than 40 years, IBM® mainframes have supported an extraordinary portion of the world’s computing work, providing centralized corporate databases and mission-critical enterprise-wide applications. The IBM System z®, the latest generation of the IBM distinguished family of mainframe systems, has come a long way from its IBM System/360 heritage. Likewise, its IBM z/OS® operating system is far superior to its predecessors in providing, among many other capabilities, world-class and state-of-the-art support for the TCP/IP Internet protocol suite.
TCP/IP is a large and evolving collection of communication protocols managed by the Internet Engineering Task Force (IETF), an open, volunteer organization. Because of its openness, the TCP/IP protocol suite has become the foundation for the set of technologies that form the basis of the Internet. The convergence of IBM mainframe capabilities with Internet technology, connectivity, and standards (particularly TCP/IP) is dramatically changing the face of information technology and driving requirements for even more secure, scalable, and highly available mainframe TCP/IP implementations.
The z/OS Communications Server TCP/IP Implementation series provides understandable, step-by-step guidance about how to enable the most commonly used and important functions of z/OS Communications Server TCP/IP.
This IBM Redbooks® publication is for people who install and support z/OS Communications Server. It introduces z/OS Communications Server TCP/IP, discusses the system resolver, showing implementation of global and local settings for single and multi-stack environments. It presents implementation scenarios for TCP/IP base functions, connectivity, routing, virtual MAC support, and sysplex subplexing.
For more specific information about z/OS Communications Server standard applications, high availability, and security, see the other volumes in the series:
- IBM z/OS V2R1 Communications Server TCP/IP Implementation: Volume 2 Standard Applications, SG24-8097-00
- IBM z/OS V2R1 Communications Server TCP/IP Implementation: Volume 3 High Availability, Scalability, and Performance, SG24-8098-00
- IBM z/OS V2R1 Communications Server TCP/IP Implementation: Volume 4 Security and Policy-Based Networking, SG24-8099-00
For comprehensive descriptions of the individual parameters for setting up and using the functions described in this book, along with step-by-step checklists and supporting examples, see the following publications:
- z/OS Communications Server: IP Configuration Guide, SC27-3650
- z/OS Communications Server: IP Configuration Reference, SC27-3651
- z/OS Communications Server: IP System Administrator’s Commands, SC27-3661
- z/OS Communications Server: IP User’s Guide and Commands, SC27-3662
This book does not duplicate the information in those publications. Instead, it complements them with practical implementation scenarios that can be useful in your environment. To determine at what level a specific function was introduced, see z/OS Communications Server: New Function Summary, GC27-3664-00. For complete details, we encourage you to review the documents that are listed in the additional resources section at the end of each chapter.
New in this Redbooks publication Volume 1:
- Resolver Resiliency - Chapter 2
- Netstat Socket Creation Time - Chapter 3
- TCP/IP Profile Syntax Checking - Chapter 3
- IPv4 Interface Statement Support - Chapter 3
- TCP Protocol Timer Configuration - Chapter 3
- User Control of Ephemeral Port Ranges - Appendix B
Table of contents
Chapter 1. Introduction to Communications Server for z/OS IP
Chapter 2. The resolver
Chapter 3. Base functions
Chapter 4. Connectivity
Chapter 5. Routing
Chapter 6. VLAN and virtual MAC support
Chapter 7. Sysplex subplexing
Chapter 8. Diagnosis
Chapter 9. z/OS in an ensemble
Appendix A. IPv6 support
Appendix B. Additional parameters and functions
Appendix C. Examples used in our environment
Appendix D. Our implementation environment
These pages are Web versions of IBM Redbooks- and Redpapers-in-progress. They are published here for those who need the information now and may contain spelling, layout and grammatical errors.
This material has not been submitted to any formal IBM test and is published AS IS. It has not been the subject of rigorous review. Your feedback is welcomed to improve the usefulness of the material to others.
IBM assumes no responsibility for its accuracy or completeness. The use of this information or the implementation of any of these techniques is a customer responsibility and depends upon the customer's ability to evaluate and integrate them into the customer's operational environment.