Packet forwarding apparatus with a flow detection table

Details Packet forwarding apparatus with a flow detection table Packet forwarding apparatus with a flow detection table

H - Electricity

04

L

H04L 12/56 (2006.01) H04L 29/06 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2282159

A packet forwarding apparatus provided with a plurality of line interface units, comprises a routing processing unit, a flow detection unit and a packet forwarding unit. The routing processing unit refers to a routing table based on header information in a received packet to specify one of a plurality output lines to which the received packet is output. The flow detection unit refers to an entry table in which a plurality of entries with flow conditions and control information are registered to retrieve control information defined by the entry with a flow condition which coincides with that of the header information of the received packet. The packet forwarding unit transfers the received packet to one of the line interface units connected to the output line specified by the routing processing unit. An entry table is divided into a plurality of subtables corresponding to the values of flow attributes associated with the received packets. The flow detection unit retrieves the control information from one of said subtables specified by the value of the flow attribute corresponding to the received packet.

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