XCF establishes network communication in a sysplex. This allows applications in a sysplex to transmit (send and receive) data across systems. With XCF, applications can distribute specific functions between multiple processors and/or systems. As a result, an installation can spread the processing workload across the sysplex, taking advantage of individual system features, as well as providing capabilities for the applications.
References
IBM Cross System Coupling Facility (XCF) Wikipedia(Text) CC BY-SA