You can change the power-on connection setting, the MAC address, and the network connection for the virtual network adapter configuration for a virtual machine.

Manually assigned MAC addresses for virtual machines on ESX/ESXi hosts must begin with the OUI 00:50:56. The address must have the form 00:50:56:XX:YY:ZZ, where XX is a hexadecimal number between 00 and 3F, and YY and ZZ are hexadecimal numbers between 00 and FF.


In the vSphere Client inventory, right-click the virtual machine and select Edit Settings.


Click the Hardware tab and select the appropriate NIC in the Hardware list.


To connect the virtual NIC when the virtual machine is powered on, select Connect at power on.


Select an option for MAC address configuration.

Select Automatic to assign a MAC address automatically.

Select Manual and enter a MAC address to use a manual MAC address assignment.


Under Network connection, use the drop-down menu to select the network label you want the virtual machine to use.


Click OK to save your changes and close the dialog box.