When you retain the MAC address when migrating, you might inadvertently create a duplicate MAC address. You can change the MAC address for the migrated virtual machine.

After migration, there are communication problems among your virtual machines.

You created a duplicate MAC address during the migration process.


In the vSphere client, power off the virtual machine.


In the inventory, right-click the virtual machine and choose Edit Settings... from the context menu.

The Edit Settings window opens.


On the Virtual Hardware tab, expand the Network adapter.


Next to the MAC Address text box, choose "Manual" from the drop-down menu.

The MAC Address text box is editable.


Specify a unique MAC address.


Click OK.

Check to see whether the unique MAC address solves your communication problem.