Abstract: A frame search processing apparatus includes a frame information extraction unit (1) that extracts frame information from an input frame, a search processing unit (2) that compares the frame information with entry information, and a frame information output control unit (3) that controls output of the frame information to the search processing unit (2). The search processing unit (2) includes a plurality of comparison units that read out N pieces of entry information from a search table, and perform comparison between the entry information and the frame information at once.

Abstract: A frame search processing apparatus includes a frame information extraction unit (1) that extracts frame information from an input frame, a search processing unit (2) that compares the frame information with entry information, and a frame information output control unit (3) that controls output of the frame information to the search processing unit (2). The search processing unit (2) includes a plurality of comparison units that read out N pieces of entry information from a search table, and perform comparison between the entry information and the frame information at once.

Abstract: The end of a communication period can be detected reliably and efficiently by a control unit and validity/invalidity of search rules in a search table can be effectively managed. A timer is provided so as to correspond to each entry area of the search table. Then, under control of a timer managing unit, the timer starts a counting operation whenever information is written in a validity management table or a packet in which a communication parameter matches a packet search condition corresponding to information on the validity management table that is set as valid is received. In addition, when a counting time of the timer exceeds a preset time-out time, information indicating the time-out is stored in a time-out management table.

Abstract: The end of a communication period can be detected reliably and efficiently by a control unit and validity/invalidity of search rules in a search table can be effectively managed. A timer is provided so as to correspond to each entry area of the search table. Then, under control of a timer managing unit, the timer starts a counting operation whenever information is written in a validity management table or a packet in which a communication parameter matches a packet search condition corresponding to information on the validity management table that is set as valid is received. In addition, when a counting time of the timer exceeds a preset time-out time, information indicating the time-out is stored in a time-out management table.

Abstract: IPoE/PPPoE forwarding table 106 is provided with which registered are network addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE, a protocol type is selected corresponding to a network address in IPoE/PPPoE forwarding table 106 that matches a destination IP address included in header information of an IP packet of an input frame, and when the selected protocol type is PPPoE, a PPPoE session is further selected from a retrieval index corresponding to the network address.

Abstract: IPoE/PPPoE forwarding table 106 is provided with which registered are network addresses, protocol types, destination IP addresses used in IPoE and retrieval indexes of PPPoE sessions used in PPPoE, a protocol type is selected corresponding to a network address in IPoE/PPPoE forwarding table 106 that matches a destination IP address included in header information of an IP packet of an input frame, and when the selected protocol type is PPPoE, a PPPoE session is further selected from a retrieval index corresponding to the network address.