Telling CICS whether daisy-chaining of non-terminal-related START requests is supported

When the routing program is invoked for routing, if you want daisy-chaining support of routed requests, return a value of Y in the DYRDCYN field in the communications area or container (mapped by the DFHDYPDS copybook).

When the dynamically routed non-terminal EXEC CICS START request is received in the target region, CICS checks whether the originator of the request supports daisy-chaining. If daisy-chaining is supported, CICS passes the originator's data, which is contained in the DYRUSER field in DFHDYPDS, unchanged to the local instance of the distributed routing, and sets the DYRDCYN field to N. It is the responsibility of the distributed routing program to decide whether to continue daisy-chaining of the non-terminal EXEC CICS START request and update the contents of fields DYRDCYN and DYRUSER accordingly.

The CICSPlex® SM routing implementation does not support daisy-chaining of dynamically-routed START requests.