Setting up EXCI for dynamic routing

You can dynamically route requests to CICS® programs from applications that use the EXCI using CICSPlex® SM.

1. Specify the following system initialization parameters in the CICS region:
   • DSRTPGM=EYU9XLOP
   • DTRPGM=EYU9XLOP
2. Update your RDO group as follows:
   1. Add an RDO entry for the EXCI server program, DFHMIRS.
      You can use another transaction instead of EXCI if required, but it must point to program DFHMIRS and have a profile of DFHCICSA. Model it after the EXCI transaction in group DFH$EXCI. This transaction will point to DFHMIRS program.

      Note: The user transaction when defined as remote will only work within an APPC configuration. Within an EXCI or MRO configuration the mirror transaction must run in the local CICS region, by specifying DYNAMIC(NO) and no REMOTE attributes. Routing the mirror transaction to another CICS region can impact performance and make problem determination more difficult.
   2. Add the RDO group to the terminal-owning region (TOR) LIST.
   Ensure that the TOR region has program autoinstall disabled.
3. Log into CICSPlex SM and define the transaction for the routing region into these CPSM groups: TXNGRP, WLMDEF, WLMGRP WLMSPEC.
4. For each application-owning region (AOR), create the RDO group in the same way as the sample definition DFH$EXCI.
   This group must contain only the connections, sessions, and application programs, or equivalent transactions. If you used a different transaction instead of EXCI, you must specify it in this group.