General information about managing APPC links

The operator commands controlling APPC connections cause CICS® to execute many internal processes, some of which involve communication with the partner systems. The major features of these processes are described on the following pages but you should note that the processes are sometimes independent of one another and can be asynchronous. This makes simple descriptions of them imprecise in some respects. The execution can occasionally be further modified by independent events occurring in the network, or simultaneous operator activity at both ends of an APPC connection; these circumstances are more likely when a component of the network has failed and recovery is in progress. The following sections explain the normal operation of the commands.

Note:
The principles of operation described in these sections also apply to the EXEC CICS INQUIRE CONNECTION, INQUIRE MODENAME, SET CONNECTION, and SET MODENAME commands. For programming information about these commands, see the CICS System Programming Reference manual.

The rest of this section contains the following topics:

Related tasks
Defining APPC links
Acquiring a connection
Controlling sessions with the SET MODENAME commands
Releasing the connection
Related reference
Summary of APPC link management
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