Logical unit

6

A VTAM® application program communicates with other LUs. In this example, the LUs with which the application program is communicating are associated with an SNA cluster controller.

In general, for programmable SNA devices, the user defines which processing functions take place in a program in the programmable device (such as a cluster controller) and which take place in the VTAM application program in the host processor. The user must coordinate the cluster controller program and the VTAM application program to enable them to work together.