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® provides world class and state-of-the-art support for the TCP/IP Internet protocol suite.

The convergence of IBM mainframe capabilities with Internet technology, connectivity, and standards (particularly TCP/IP) is changing the face of information technology dramatically and is driving requirements for even more secure, scalable, and highly available mainframe TCP/IP implementations.

The z/OS® Communications Server TCP/IP Implementation series of IBM Redbooks® publications provide 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 provides an introduction to z/OS Communications Server TCP/IP and discusses the system resolver. It also 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, refer to the other volumes in the series.

Chapter 1. Introduction to z/OS Communications Server 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

Appendix A. IPv6 support

Appendix B. Additional parameters and functions

Appendix C. Examples used in our environment

Appendix D. Our implementation environment