Multi-Tech Systems 40-01459-D0-001 - Manual (Page 44)

38 PCI ESCON Adapter Installation Guide
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.