This example illustrates a sysplex of two systems whose signaling paths are defined exclusively through the coupling facility. In this example, the group, named NEWAPP, is assigned to its own transport class, and all other COUPLExx defaults are taken. This ensures that message traffic for the members of the NEWAPP group is sent on its own dedicated signaling structure and does not compete with other multisystem applications.

In this scenario, the sysplex named PLEXOF2C consists of two MVS™ systems (SYSA and SYSB) on two processors.

One group, NEWAPP, in the sysplex requires special consideration. NEWAPP is assigned to its own transport class (TCNEW) in the COUPLExx parmlib member on each system in the sysplex.

Members of other groups on this system share signaling resources in the DEFAULT transport class.

You might consider using this configuration when you plan to use an application for which you do not want other multisystem applications competing for signaling resources.