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Research on SDN-based LAN Unknown Unicast Processing Mechanism

A switch usually processes the received unknown unicast (UU) frames through flooding, but it consumes tremendous resources and much bandwidth if receiving and processing too large UU frames at a very high speed, which affects the normal data forwarding. In this case, the network may be attacked through the UU flooding mechanism of switch, and some special network applications may be affected if the flooding of UU frames is prohibited or inhibited. On the basis of software defined network architecture, a mechanism replacing UU flooding with address resolution protocol broadcast is put forward to resolve the problems of resource consumption and network attack resulting from the flooding mechanism. Besides, a simulation test is carried out to verify the feasibility and effectiveness of the proposed solution.