[ovirt-users] Several virtual machines all with the same MAC address ?

Hello, I need to replicate some file servers that must have the same MAC address to work properly and which will be placed on different VLANs to avoid MAC conflicts. With VMware and VirtualBox this is quite simple and works without particular problems but it seems that oVirt does not allow it or I did not find how to proceed. So 2 questions: - does it is possible ? - what must be done to allow oVirt to handle it ? Thanks, Li