The present invention discloses a communication device, including a first network interface, for receiving a plurality of packets composed of a plurality of first packets destined to a first communication device and a plurality of second packets, a first reordering engine, for reordering the plurality of first packets, outputting the plurality of reordered first packets, and outputting the plurality of second packets, a second reordering engine, for receiving the plurality of second packets from the first reordering engine, and reordering the plurality of second packets, a second network interface, for receiving the plurality of reordered first packets from the first reordering engine, and transmitting the plurality of reordered first packets to the first communication device, and a processing module, for processing the plurality of reordered second packets.