Patent ID: 6434153
Filing Date: 2002-08-13
Classification: H04L,H04Q

Abstract:
A packet communication system for transmitting a packet, the packet having header information including address information, a port number, and a DS (Differentiated Services) value, comprising:a plurality of input lines; a plurality of output lines; a switching unit connected to said input lines and said output lines, the switching unit outputting the packet from an input line of said input lines to an output line of said output lines; and a control unit for switching a mode to apply to the packet of first mode, second mode, and third mode based on the header information, the first mode being a mode that decides priority of the packet by at least one of the address information and the port number, the second mode being a mode that decides priority of the packet by the DS value, and the third mode being a mode that decides to rewrite the DS value by at least one of the address information and the port number; wherein the port number is a TCP (Transmission Control Protocol) port number or a UDP (User Datagram Protocol) port number.