Tandem Logon Manager for IBM Systems (ILOGMGR) Manual

Tandem Logon Manager for IBM Systems (ILOGMGR) Manual—127335 B-1
B
Logical Flows and Internal Formats
This appendix contains information about internal communication between the
TLOGMGR, the ILOGMGR, VTAM, and the terminal.
Logical Flows
This subsection provides illustrations of the logical flows typical of the communication
between a TLOGMGR and an ILOGMGR.
Records of this communication are found in GTF traces, which are used for
troubleshooting if improper processing occurs while the ILOGMGR is operational. For
information about GTF traces, see Section 5, “Reporting Problems.”
These records also are found in SNAX/APN line traces available on the Tandem system.
For information about SNAX/APN line traces when using the TLOGMGR, see the SCF
Reference Manual for SNAX/APN.
As is shown in Figure B-1, the ILOGMGR remains in session with the terminal until a
BIND is received from the application. At that time, ILOGMGR ends its session with
the terminal, allowing the session between the terminal and the application to begin.
Figure B-1. Normal Logon Logical Flow
Logon
Logon Exit
Program Start Request
BIND2
Program Start Reply
TLOGMGR ILOGMGR VTAM TERMINAL
008
APPLICATION
BIND1
UNBIND1