EE can use any interface supported by the TCP/IP stack. Use OSA-Express adapter in QDIO mode and HiperSockets™ for optimal performance and function. With OSA-Express3 adapters or later, you can use QDIO inbound workload queueing to further improve throughput for both inbound Enterprise Extender (EE) packets and for inbound non-EE traffic over the same interface. For more information, see QDIO inbound workload queueing in z/OS Communications Server: IP Configuration Guide. For intra-CEC communication, EE-over-HiperSockets provides superior performance unless CPU availability is limited. If CPU availability is limited, then EE communication using a shared OSA adapter provides optimal performance.