DB2CONN

The DB2CONN system initialization parameter specifies whether you want CICS to start the DB2® connection automatically during initialization.

DB2CONN={NO|YES}
Valid values are as follows:
NO
Do not automatically invoke DFHD2CM0, the CICS DB2 attach program, during initialization.
YES
Invoke the CICS DB2 attach program, DFHD2CM0, automatically during CICS initialization. The other information CICS needs for starting the attachment is taken from CICS DB2 connection resource definitions installed from the CSD.

Specifying DB2CONN=YES is the recommended alternative to specifying the CICS DB2 attach programs in the CICS post-initialization program list table (PLT).