How the Entire Net-Work Simple Connection Line Driver Operates

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# How the Entire Net-Work Simple Connection Line Driver Operates

The Entire Net-Work Simple Connection Line Driver uses TCP/IP as its transport mechanism. The Simple Connection Line Driver establishes a TCP/IP listen on the port specified in the driver SERVERID parameter. This port matches the port specified in the access URL in the Directory Server used by the ADI-enabled client. (For complete information about Adabas Directory Server, read Adabas Directory Server Documentation.)

When a mainframe client makes an Adabas call to an open systems database, mainframe Entire Net-Work determines that the call needs to be delivered to the Entire Net-Work 7 node that serves the database. The Simple Connection Line Driver then sends the Adabas call to the Entire Net-Work 7 node.

Note
Mainframe Entire Net-Work does not use the Directory Server directly. Instead, open systems Entire Net-Work (version 7 and later) notifies the mainframe node of the databases that Entire Net-Work 7 serves and the mainframe node then broadcasts this information throughout the network.

The ADI-enabled client needs to know only the database ID. No client-side configuration or application changes are required. Client applications do not need to be modified; however, the Directory Server must be configured with the URL information for each target database.

The Directory Server does not participate in the data flow. It participates only in client-server session creation, by providing the client the correct network address of the target database server.

URLs contained in the Directory Server have the following format:

For example:

    XTSaccess.68[0]=TCPIP://ahost:3001?retry=3

In this example:

Entry | Description
--- | ---
XTSaccess | Identifies this as a Directory Server Access entry, read by the client.
68 | The target database ID.
TCPIP | The communications protocol to be used for database 68.
ahost | The name of the host computer on which the server (Entire Net-Work with the Simple Connection Line Driver runs.
3001 | The port where the server (the Simple Connection Line Driver) will listen. This value matches the `SERVERID` parameter of the TCPX DRIVER statement.
retry=3 | One of multiple optional parameters that may be used. The first parameter is preceded by a question mark (?) and subsequent parameters, if any, are preceded by an ampersand (&).

Because all Software AG ADI-enabled products use the Adabas Directory Server, one may already be in place and configured for your network environment. Contact Software AG if you require additional assistance.