By default, networking between an Oracle Solaris 10 service domain and other domains in the system is disabled. Because networking is not enabled by default in the Oracle Solaris 10 OS, you must enable networking by configuring the virtual switch device as a network device. The virtual switch can either replace the underlying physical device (nxge0 in this example) as the primary interface or be configured as an additional network interface in the domain.
Guest domains can automatically communicate with the Oracle Solaris 10 service domain as long as the corresponding network back-end device is configured in the same virtual LAN or virtual network.