Patent ID: 7570592
Filing Date: 2009-08-04
Classification: H04L

Abstract:
1. A data transfer device of a cut-through method, comprising: an input unit accepting an input of a control frame and an input of a data frame; a processing unit executing a transfer process of the data frame or a discard process of the data frame on the basis of the control frame inputted from said input unit; and an output unit outputting the data frame subjected to the transfer process in said processing unit and the control frame to an outside, wherein said processing unit includes: a discard target storage module stored with information showing discard target data frames; a management unit updating the information in said discard target storage module on the basis of the control frame; a discard processing unit executing the discard process if the data frame proves to be a discard target by referring to said discard target storage module; and an error detection unit detecting an error of the data frame, and when the data frame is an error frame containing an error, said error detection unit detects the error, assembles a new control frame showing a purport that the error frame is to be discarded, and outputs the new control frame to the outside from said output unit.