Relay system has much lower rate than that of optics and thus makes it the bottle-neck of the Internet gradually. And the load balanced switch architecture, because of its unique O(1) complexity of the connection pattern of crossbar, becomes the ideal switch architecture for high-speed switching. However, load balanced switch may cause packets to be out-of-sequence and current solutions have poor performance or higher complexity than O(1) which reduces the performance while maintaining wire-speed switching. Based on current situation, this paper introduces a load balanced switching architecture called SLBA (Smart Load Balanced switch Architecture), which uses the reverse communication mode of crossbar and the smart RB(Re-sequencing Buffer) to enable packets to be delivered into the DQ(Departure Queue) without disordering. SLBA has O(1) computational complexity throughout the whole switching process and the performance is better in light loaded condition compared with ByteFocal.
