The below table provides the detail about which changes in a Physical or Virtual machine can cause impact on license.
Physical Machine
When any product runs on a physical machine, the following situations can have impact on license:
Case | Description | Result | Can be repaired |
|---|---|---|---|
Unique Machine numbers (UMN1 and UMN2) change | Licensing checks for: - UMN1: the manufacturer physical hard disk serial number and the disk model - UMN2: MAC address of the Network Interface Card. It is only suitable for a physical device, therefore non-hot-swappable (e.g. USB, PC-BUS) and not a driver abstraction (e.g. "RAS Async Adapter").
| If UMN1 and UMN2 change together license become restricted.
NOTE: If only one of the UMN changes the license, remain valid. | Yes |
PC hardware change\upgrade | The following hardware elements (HID=host identifier) are verified: -Boot disk serial number - MAC address of the Ethernet adapter - CPU identifier - BIOS identifier - RAM size - Hostname - IP address | If more than 50% of the listed devices changes all at once a binding break occurs, causing license to become restricted. | Yes |
The machine image is copied to another machine. | The Unique Machine Identifier (UMI) is no longer valid. | The license becomes restricted. | No |
Operating System upgrade | The O.S. upgrade can alter the order in which hardware devices are discovered. | The license may become restricted. | Yes |
Virtual Machine
When any product runs on a virtual machine, the following situations can have impact on the license:
Case | Description | Result | Can be repaired |
|---|---|---|---|
VM Clone | The virtual machine is cloned and it is started in the same Host or in a different Host. | The license becomes restricted. | No |
VM Copied | The virtual machine is copied from a different Host or within the same Host. | The license becomes restricted. | No |
VM revert to snapshot | The virtual machine is restored to a snapshot (image) previously saved. | The license becomes restricted. | No |
VM restore from backup | The VM is restored from a backed up image. | The license becomes restricted | No |
MAC addresses of VM change | The MAC address of the VM is changed via the virtual machine manager (VVM). If there is more than one MAC address, all addresses need to be changed. | The license becomes restricted. NOTE: If more than one MAC address is present and only one MAC is changed the license remain valid. | No |
Live Migration/vMotion | The Live Migration function allows the transfer of virtual machines between different physical nodes within the cluster without any service interruption. | The license is maintained. | Not required |
Note: For those cases where the license repair is possible, the restricted licenses can be repaired through the LMU tool or the LMU.