Patent ID: 7804794
Filing Date: 2010-09-28
Classification: H04L

Abstract:
1. A network switching device comprising: at least one interface block, connected respectively to at least one line, that receives packets with associated destination-address information and sends packets to a forwarding destination, wherein the at least one interface block is adapted to change operation to operation modes with different levels of power consumption; at least one switching block that determines the forwarding destination of a received packet based on the destination-address information of the received packet, wherein the at least one switching block is adapted to change operation to operation modes with different levels of power consumption; a mode management block that manages the operation modes of the at least one interface block and the operation modes of the at least one switching block independently; and wherein the at least one switching block includes: at least one first clock generator that generates a plurality of selectable first clock signals having different frequencies; and at least one constituent circuit that operates synchronized with a selected first clock signal of the first clock signals, and wherein the mode management block controls operation of the at least one first clock generator to select a first clock signal of the first clock signals, to change the operation mode of the at least one switching block.