Preface This IBM® Redbook will help you to install, tailor, and configure the IBM Communication Controller for Linux® on System zTM (CCL) V1.2.1. It focuses on the migration of IBM 3745/46 hardware functions and the IBM Network Control Program (NCP) to a CCL environment with easy-to-understand, step-by-step guidance. The publication provides information to assist you with the planning, implementation, and setup of OSA-Express, Linux, and CCL, and describes helpful utilities and commands that you can use to monitor and operate the CCL environment. Using realistic scenarios, it explains the changes that are necessary to NCP and VTAM® definitions to support CCL. The target audience for this redbook includes system engineers, network administrators, and systems programmers who will plan for and install CCL V1.2.1. Readers should have a solid background in SNA networking (VTAM and NCP) and Linux operating systems, as well as OSA-Express setup and OSA/SF usage. The team that wrote this redbook This redbook was produced by a team of specialists from around the world working at the International Technical Support Organization, Poughkeepsie Center.