A computer system establishes data communications for a virtual machine that is configured with an enhanced Media Access Control (MAC) address. A management computer instantiates the virtual machine responsive to the enhanced MAC address. The management computer automatically instantiates a virtual Local Area Network (vLAN) and a virtual Switch (vSW) on the vLAN to serve the virtual machine using the enhanced MAC address. The management computer allocates an Internet Protocol (IP) address to the virtual machine and automatically instantiates a virtual Router (vRTR) to serve the vSW using the IP address. A network computer executes the virtual machine, the vLAN, the vSW, and the vRTR to exchange user data between the virtual machine and a data communication network over the vSW, vLAN, and vRTR using the enhanced MAC address and the IP address.