Multi-Tech Systems 40-01459-D0-001 manual Mainframe Configuration, OS/390 Device Definition

Mainframe Configuration

This section discusses configuration of the mainframe for use with TCP/IP Direct Connect over a Channel-to-Channel (CTC) link. Mainframe configuration for Communications Server, SNA Server, TCP/IP Passthrough for Windows NT, and MPC+ for Windows is discussed in the user’s guide that accompanied each individual product.

OS/390 Device Definition

As discussed in the previous section, TCP/IP Direct Connect over CTC uses two adjacent sub-channel addresses.

The two sub-channel addresses must both be defined to the mainframe as Serial Channel-to-Channel (SCTC) devices.

OS/390 Version 2 Release 4 and above uses the HCD Configuration Utility, a menu- based interactive program to complete this task. Refer to the OS/390 HCD User’s Guide for instructions on using HCD.

Make sure the Subchannel Address field on the TCP/IP Direct Connect Properties screen points to the device address in the ESCON Configuration for a SCTC device that has been defined in HCD (see Figure 5-23).

OS/390 Parmlib Update

You must turn off the missing interrupt handling processes in OS/390 for the device addresses being used for TCP/IP Direct Connect. To do this add the following statement to the SYS1.PARMLIB(IECIOSxx) member:

MIH TIME=00:00,DEV=(xxx-yyy)

where xxx-yyy defines the range of devices being used by TCP/IP Direct Connect.

38 PCI ESCON Adapter Installation Guide