US Patent 7230925 Load balance device and method for packet switching

In a trunking-port network environment, a ticket assigner and a ticket distributor are included in a packet switch load balance device together to achieve an output load balance during the transmission process of packet switching. The ticket assigner assigns one of the tickets to a packet received by a logical port, and the ticket distributor determines which one of the physical output ports to transmit the packet according to the assigned ticket. In the transmission process, a load monitor dynamically adjusts the ticket distribution scheme used for the ticket distributor, and thus the load balance is optimized.