An application can specify its connectivity requirements with the CONNECTIVITY keyword on the IXLCONN macro when connecting to a structure. An application can specify that it requires a structure to be allocated in a coupling facility that has connectivity to all systems in the sysplex, that has connectivity to the best subset of systems in the sysplex based on SFM weights, or that most closely meets the coupling facility attributes requested.

The CONNECTIVITY keyword applies only to the IXLCONN request that causes the structure to be allocated, the first connector to the structure. The system ignores the connectivity requirement specified by subsequent connectors to the structure. See Selecting a Coupling Facility for Structure Allocation for information about how the system uses the CONNECTIVITY keyword.