Patent ID: 7206283

Claim:
A digital switch comprising: a plurality of interconnected blades, wherein each of the blade comprises: (1) a plurality of physical ports each capable of receiving a packet of data; (2) first and second packet processors capable of processing packets at a rate of at least 10 gigabits/second; and (3) an interface adapter ASIC coupled to the first packet processor by a first serial link and to the second packet processor by a second serial link, whereby the first and second packet processors are interconnected through the interface adapter ASIC; a switching circuit comprising a plurality of ports; and a plurality of serial pipes each coupled between a respective one of the ports of the switching circuit and the interface adapter ASIC of a respective one of the plurality of interconnected blades, whereby the plurality of interconnected blades are interconnected through the switching circuit; wherein the interface adapter ASIC of a respective said blade is adapted to serially receive a cell comprising packet data and in-band state information, the in-band state information comprising a blade identifier and a packet processor identifier, and to serially transmit the cell to the second packet processor of the respective said blade based on the in-band state information; and wherein the switching circuit is adapted to serially receive a cell comprising packet data and in-band blade identifier information via a respective one of the serial pipes from the interface adapter ASIC of a source one of the plurality of interconnected blades, and based on the in-band blade identifier information to serially transmit the cell via another of the serial pipes to the interface adapter ASIC of a destination one of the plurality of interconnected blades.