IBM s/390 manual IPL OS/390, Terminal Solicitor

Terminal Solicitor

Starting the resource manager, resadm, automatically starts the FLEX-ES Terminal Solicitor. In order to connect to the FLEX-ES Terminal Solicitor, we connect a TN3270 client to the Linux IP address using port 24. Port 24 is the default port for the Terminal Solicitor. The client system can be connected to any LAN that is connected to our Linux5. The Terminal Solicitor presents a panel to us with the names of available6 3270 devices (these are often made available by the FLEX-ES CLI mount command, although we elected to hard-code them in the resource definitions):

Welcome to the FLEX-ES Terminal Solicitor (node: itsoefs1)

Please select (X) the desired service and press enter (PA1 to exit; CLEAR to refresh)

_ L702	_ L703
_ L704	_ L705	_ L706	_ L707
_ L708	_ L709	_ L70A	_ L70B
_ L70C	_ L70D	_ L70E	_ L70F
Figure 4-1	Terminal Solicitor panel	(on a TN3270 screen)

If we had not started the Linux x3270 sessions for mstcon and L701 in our shell script, then these names would also appear in the Terminal Solicitor list. We would need to select mstcon from the list to activate that session before IPLing OS/390, since it will be used for the MVS master console.7 When we select a terminal (by marking it with an X and pressing Enter8), the Terminal Solicitor screen (on our client TN3270 session) is replaced by a 3270 connection to the indicated terminal address. After OS/390 is up, this is likely to result in the USSTAB logo screen.

4.1.2 IPL OS/390

The OS/390 IPL starts when you execute a flexes ipl command. The ipl command can be entered from the flexes window or in a startup script, as shown in 4.1.1, “Building a shell script” on page 29.9 Once our OS/390 was operational, we tried a few typical OS/390 commands, as shown in the following (the operator commands are shown in bold type):

- 11.06.30 d m=stor

11.06.32IEE174I 11.06.30 DISPLAY M 454

REAL STORAGE STATUS ONLINE-NOT RECONFIGURABLE

0M-256M

ONLINE-RECONFIGURABLE NONE

PENDING OFFLINE NONE

5It can also be another window on our Linux desktop.

6Once a 3270 terminal device is selected by a user, it is removed from the Terminal Solicitor panel. When the device is freed by the user, it reappears on the Terminal Solicitor panel and can be selected by another user.

7The AD system expects a 3270 terminal at address 700 for its master console. The name mstcon is arbitrary, and matches the name chosen for a 3270 defined at address 700 when the resource definition file was created.

8Many 3270 emulator users set up the right-hand Ctrl key as the logical 3270 Enter key, since this most closely matches a “real” 3270 keyboard. We did this and, using the IBM PCOM emulator, we pressed the right-hand Ctrl key.

9We eventually removed it from our shos script because we frequently wanted to IPL with various different IPL parameters. We used the same shos script (less the ipl command) and simply typed our ipl command at the flexes prompt.

Chapter 4. FLEX-ES Operation 31