Tandem Logon Manager for IBM Systems (ILOGMGR) Manual

Device Logon
1-2 127335—Tandem Logon Manager for IBM Systems (ILOGMGR) Manual
Introduction to the ILOGMGR
Device Logon
The logon procedure is handled by the extended logon facility (XLF). XLF requires the
interaction of four software components:
•
The ILOGMGR
Resides on the SNA host. This process intercepts logon requests from devices
and forwards those requests to the SNAX/APN subsystem.
•
The SNAX Creator-2 process
Resides on the Tandem system. In response to logons, this process either creates
a requested Tandem Advanced Command Language (TACL) process or
passes start-up information to either a user-written server or the Pathway
transaction processing environment. The Pathway environment provides the
means for monitoring online transaction processing (OLTP) using requesters
and servers. See the SNAX Creator-2 Configuration and Control Manual for
more information about the SNAX Creator-2 process.
•
The SNAX/APN logon manager (TLOGMGR)
A component of SNAX/APN. The TLOGMGR creates remote LU objects to
represent devices, such as 3270 terminals, and forwards the names of those
devices to the SNAX/APN service manager.
Following are illustrated examples of device logon using XLF. The text and figures
explain how processes on both the Tandem and the SNA systems interact to establish a
session between a Tandem application and a remotely attached 3270 device.
Figure 1-1 shows a simple configuration example for device logons. The SNA
configuration consists of the following:
•
The control file for the ILOGMGR, which defines the ILOGMGR (ibm1), the
TLOGMGR (tn1), and an application associated with the TLOGMGR (tcl1).
•
VTAM list (VTAMLST) definition statements that identify both the ILOGMGR
(ibm1) and a Tandem application program (tcl1) as VTAM APPL objects.
•
The NCP definition, which includes:
•
LINE and PU definition statements for the Tandem connection with an LU
statement for the TLOGMGR (tn1).
•
Line, PU, and LU definition statements for the 3270 device (lua1).
•
SCF configuration. With this configuration, the ILOGMGR must be started last.
See “Configuring the Control File,” “Configuring the VTAM List,” “Defining the NCP,”
and “Example ILOGMGR Configurations For Token-Ring” in Section 3, “Configuring
for the ILOGMGR,” for detailed information about configuring the control file, VTAM,
and NCP.