The application relates to a method and a system for handling unknown unicast data packets. The system includes a processor adapted for running a switch controller application, logic configured for detecting a switch in a network, logic configured for determining that the switch is capable of communicating via the switch controller application, and logic configured for overwriting a default rule for handling unknown unicast packets in the switch such that the switch sends any unknown unicast packet received by the switch to the system instead of flooding when an unknown unicast packet is received. The method includes detecting a switch in a network, determining that the switch is capable of communicating via a switch controller application, and overwriting a default rule for handling unknown unicast packets in the switch such that the switch sends any unknown unicast packet received by the switch to the switch controller instead of flooding when an unknown unicast packet is received.