This document provides information on Entire Net-Work for zIIP, a selectable unit of Entire Net-Work that enables Entire Net-Work to make use of IBM’s zIIP engine. Entire Net-Work for zIIP enables Entire Net-Work on z/OS to offload part of its workload from the mainframe’s general processors (GP) to System z Integrated Information Processors (zIIP).

Offloading work from the GPs will free up some of their capacity. This helps decrease the total cost of operation (TCO) of the GPs and makes room for running additional workload on them. Furthermore, the use of Entire Net-Work for zIIP may result in performance benefits by increasing the throughput for certain workloads.

Entire Net-Work for zIIP supports the following Drivers:

• CTCA

• FCTC

• TCPI

• TCPX

• VTAM

• XCF

This documentation is organized under the following headings:

Prerequisites	Requirements for zIIP support by Entire Net-Work.
Current Limitations	Currently limited functionality.
General Information on zIIP Processing	Brief description of zIIP processing.
Entire Net-Work for zIIP Processing: Concepts	Explanations of the TCB and SRB processes and the WLM enclaves Entire Net-Work requires for zIIP processing.
Monitoring zIIP Usage	System information, reports and statistics available for controlling and evaluating zIIP-enabled Entire Net-Work sessions.