Quick Start


Configuring the Server for 3270 Emulation

Many large enterprises using MVS hosts already make wide use of 3270 emulation. An TSM client simply generates a sequence of keystrokes that results in a connection being established with the server.

OS/2, DOS, or Windows TSM clients can connect to an MVS server using 3270 emulation.

Connectivity Support

IBM ACF/VTAM 3.3 (5685-085) or later is required to run the 3270 communication method on the TSM server.

VTAM Setup

Your VTAM system administrator or systems programmer defines a new application to VTAM through the use of an access control block (ACB). An ACB defined for TSM, when added to the VTAM configuration, provides an application ID that the TSM client references when it wants to connect to the server. When the TSM application ID is referenced, a logon procedure is begun which ultimately tells the TSM server where to look for the client.

The VTAM APPL Statement

You define the ACB in the VTAM APPL statement. The following is an example of the APPL statement that the VTAM systems programmer should add to your VTAM configuration:

+--------------------------------------------------------------------------------+
|TIVSM    VBUILD TYPE=APPL                                                       |
|DSMAPPL APPL   ACBNAME=DSMLU,                                   x               |
|               MODETAB=ISTINCLM,DLOGMOD=#BATCH                                  |
+--------------------------------------------------------------------------------+

DSMLU is the application ID that the client references when it wants to connect to the server. The way in which the client references this name is discussed later in this installation guide where we cover client connectivity.

The Logon Mode Definition

When the client references the application ID for the server (DSMLU), the MODETAB=ISTINCLM and DLOGMOD=#BATCH parameters reference a logon mode definition which establishes the connection and the characteristics of the session. These characteristics include the maximum number of sessions allowed, the maximum number of conversations allowed, and other control information. MODETAB references the table in which the logon mode definition entry is found. In this example, the table referenced is the IBM supplied VTAM default table (ISTINCLM). DLOGMOD references the table entry itself which is the default logon mode definition #BATCH.

We recommend that you use the #BATCH mode entry in the VTAM default logon mode table (ISTINCLM) initially to establish the 3279 emulation connection. Depending on your VTAM level, this mode might not be pre-defined in the default logon mode table. You should verify this with your VTAM system programmer. If this mode is needed, add it to the default logon mode table as shown below:

+--------------------------------------------------------------------------------+
|         TITLE 'BATCH'                                                          |
|BATCH   MODEENT LOGMODE=#BATCH,                                      X          |
|                       ENCR=B'0000',SSNDPAC=8,                       X          |
|                       SRCVPAC=8,PSNDPAC=8                                      |
+--------------------------------------------------------------------------------+

After you have the 3270 emulation connection established and would like to create a new mode for performance tuning, you can create it in your current logon mode table, compile, and then link-edit the member into the VTAM library.

Tivoli Storage Manager Server Setup

Enter the ACBNAME (DSMLU) from the above VTAM definition example in the LUNAME parameter of the server options file. The entry takes the following format:

+--------------------------------------------------------------------------------+
|luname dsmlu                                                                    |
+--------------------------------------------------------------------------------+

The ACBNAME identifies the Tivoli Storage Manager server to VTAM as the application to which the client can connect.


[ Top of Page | Previous Page | Next Page | Table of Contents | Index ]