Parallel data link layer controllers providing traffic flow control in a network switching device

The present invention is of data transmission layer processor; and one or more media access controller end of the VLAN mark service, device, and a collector of statistical information for integrated in. When multiple data transmission layer processor connected with the exchange device, obviously reduce the computational load of the routing machine with undertaken. In addition, the data transmission layer processor in multiple embodiments can be used multiform soaking and post-processing introduces in network exchange system, the system is no with the functions router engine.