# License file transfer

Licensing Auto Unit Replacement (AUR) is available on Avaya Ethernet Routing Switch 5000 Series switches. If a base unit in a stack fails, the other units in the stack automatically transfer a virtual key to the new base unit. AUR eliminates the need for manual license transfer to the new base unit.

However, there are still situations that require manual license transfer from one device to another.

Under the following conditions, you need to transfer a license on the Avaya Licensing portal:

- replacement of a failed non base unit (NBU)

- incorrect MAC address entered on the Avaya License portal during license file generation

- the system displays an error message indicating that you exceed the number of MAC address swaps for a license—for each License authorization Code (LAC) you can swap up to 10% of the MAC addresses; contact Avaya Technical Support to obtain a new LAC

Use the following procedure to transfer a license.