Open or close interregion communication.
SET IRC >>-SET IRC--+------------------+------------------------------->< +-OPENSTATUS(cvda)-+ +-CLOSED-----------+ +-IMMCLOSE---------+ '-OPEN-------------'
Conditions: INVREQ, IOERR, NOSTG, NOTAUTH
For more information about the use of CVDAs, see CICS-value data areas (CVDAs).
The SET IRC command allows you to start (open) or stop (close) interregion communication (IRC) in your CICS region. IRC must be open for your region to communicate with another CICS region using a multiregion operation (MRO) connection, or for a non-CICS client region to use your CICS over an external CICS interface (EXCI) connection.
Support for this type of communication must be specified at CICS startup (in the ISC initialization option), and at least one CONNECTION resource must be defined with an ACCESSMETHOD value indicating MRO; otherwise exception conditions occur when you attempt to open IRC. The CICS® Intercommunication Guide describes the various requirements.