When a subsequent stack within the sysplex is started that is not within the same MVS™ image, TCP/IP creates and activates an XCF device and link (unless an XCF device is already defined). The XCF links connect using the sysplex coupling facility or CTC links. A new device and link are created for every other VTAM® node in the sysplex with at least one TCP/IP stack active on the same system with DYNAMICXCF specified. The generated device name is the CP name (for APPN) or SSCP name (for subarea-only nodes) of the remote VTAM. The generated link name is EZAXCFnn (IPv4), and the generated interface name is EZ6XCFnn (IPv6), where nn is the 2-character &SYSCLONE value. A host route across the XCF link is created when the XCF link is successfully activated.