Figures Figure 1, Figure 2, Figure 3, and Figure 4 show the CICS® CSD update (DFHCSDUP) commands to define the four transactions. These commands can be found in hlq.SEZAINST(EZACICCT).

EZAC

Configure the socket interface

EZAO

Enable the socket interface

EZAP

Internal transaction that is invoked during termination of the socket interface

CSKL

Listener task. This is a single listener. Each listener in the same CICS region needs a unique transaction ID.

In the definitions in Using storage protection when running with CICS 3.3.0 or later, a priority of 255 is suggested. This ensures timely transaction dispatching, and (in the case of CSKL) maximizes the connection rate of clients requesting service.