Nippon Telegraph and Telephone Corporation

Matsushita Electric Industrial Co., Ltd.

Yukikuni Nishida

Kenji Kawai

Keiichi Koike

Yuki Arikawa

Masami Urano

Tsunemasa Hayashi

Hiroki Suzuki

A frame search processing apparatus includes a frame information extraction unit () that extracts frame information from an input frame, a search processing unit () that compares the frame information with entry information, and a frame information output control unit () that controls output of the frame information to the search processing unit (). The search processing unit () 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. The frame information output control unit () includes a frame information buffer that accumulates the frame information, and an output processing unit that, when triggered by a predetermined accumulation count of the frame information or an elapse of a predetermined accumulation time of the frame information, distributes a plurality of pieces of frame information accumulated in the frame information buffer to the comparison units of the search processing unit () one by one.

Frame search processing apparatus and method

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.

Packet transfer processing device, packet transfer processing method, and packet transfer processing program

IPoE/PPPoE forwarding tableis 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 tablethat 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.

Gateway apparatus and its controlling method

Growing community of inventors

Yokosuka, Japan

Yukikuni Nishida