Shutdown protocol

The LU6.1 shutdown protocol does not use the SHUTDOWN command; it uses the data flow control commands SBI (stop bracket initiation) and BIS (bracket initial stopped). Shutdown is executed as part of session termination (by DFHZCLS) and ensures that, when a session is terminated normally (as a result of a main terminal release command or a normal CICS® shutdown), there are no unfinished syncpoint requests on the session. This means that when the session is initiated, no resynchronization sequence is required.