Fujitsu Corporation

Nippon Telegraph and Telephone Corporation

Katsumi Shimada

Chizuo Suzuki

Masaaki Inami

Hiroto Takechi

Takafumi Hamano

Kyouko Terada

Seiji Mori

Asako Haseba

Rieko Asai

Motohiro Tsuji

Kenichi Aoyagi

A frame transmission apparatus includes multiple ports provided in a line unit, and a setting control unit. The setting control unit checks the normality of the frame transfer state within the apparatus by transferring a maintenance management frame from a first port to a second port within the apparatus. When the first port is a logical port configured by link aggregation of multiple physical ports, the setting control unit selects each of the multiple physical ports as a transmission source port and transfers multiple maintenance management frames from the multiple physical ports to the second port.

Frame transmission apparatus and method for checking normality

A network system includes a maintenance terminal and a switch that transfers a packet. Upon receiving a link-trace message packet, the switch transfers, when links to the destination constitute a link aggregation, the link-trace message packet to all physical links constituting the link aggregation. In response to the link-trace message packet, the switch receives a link-trace reply packet from each of the physical links, and generates link-trace result data. the link-trace result data is output to the maintenance terminal.

Packet transfer apparatus and packet transfer method

A transmitting apparatus includes a network interface for connecting between networks; an information embedding unit that embeds, in a frame output from the network interface, first port information for identifying a first port through which the frame is received; and a path deciding unit that decides, when second port information for designating a second port that is an output destination of the frame is embedded in the frame received through the network interface, to output the frame to the second port.

Transmitting apparatus and frame transfer method

In a network connection method for interconnecting a virtual LAN distributed over plural sites via a network formed by plural layer 2 switches, a layer 2 switch monitors a first virtual LAN configuring frame sent from a site in the plural sites for configuring the virtual LAN, a network virtual LAN identifier is assigned based on the monitored first virtual LAN configuring frame, and the layer 2 switch generates a second virtual LAN configuring frame based on the assigned network virtual LAN identifier, and transmits the second virtual LAN configuring frame to the plural layer 2 switches in the network so as to establish the virtual LAN distributed over the plural sites. Accordingly, configuration and operation of a virtual LAN in a network of the layer 2 switches can be performed efficiently according to the virtual LAN tag of the subscriber.

Network connection method, network connection system, and, layer 2 switch and management server forming the network connection system

A line unit holds in its active table data a number that indicates which flooding setting table is to be made active. An input frame forwarding unit embeds the number in an internal frame header of a frame that is to be output. As the number is embedded before the frame is forwarded to each line unit via a backboard, the output destination for the same frame is determined by a common active flooding setting table. Thus, frame destruction or duplication is prevented.

Transmission apparatus and frame transmission method

In a frame transfer processing method and device, information indicating a flooding destination is preset for every physical transmission line and every VLAN when a plurality of VLANs are accommodated in a single logical transmission line where physical links are aggregated, a single transmission line is set to be used when a flooding frame is transferred to the transmission line where the links are aggregated, and the flooding destination is changed per physical link without operating the information indicating the flooding destination for every VLAN when the transmission line has failed.

Frame transfer processing method and device

A packet forwarding apparatus has link aggregation capability and prevents the occurrence of flooding when forwarding a packet to a link of a trunk. The packet forwarding apparatus includes sections for learning the source address and a receiving path of the packet by learning information for identifying a port through which to receive the packet, a trunk of a link connected to the port, and a change in the receiving path of a packet received by the trunk, packet forwarding processing unit for, when a receiving path of packets having the same source address is changed in the trunk, selecting one link from among a plurality of links of the trunk in order to forward a packet having a destination address that is the same as the source address and forwarding the packet, and a learning requesting unit for requesting the performance of learning for the packet inside the packet forwarding apparatus.

Method and apparatus for forwarding packet

A card terminal for settling transactions with a prepaid card or a credit card using comprising a card reader for reading data out of the card, a data writer for writing data on the card, a display for indicating the customer's data, transaction data, and stamp points, and a keyboard for inputting sales data, customer's data, or stamp point data. The card terminal has at least one of the functions from among inquiring about the transaction, cancellation of the transaction, purchase of commodities, calculation of the service points in accordance with an amount of transaction, display of the personal anniversary of the customer, and writing the details of a transaction, the service points, or personal data, even if the card is prepaid card or a credit card. The service point can be increased in accordance with the convenience of the stores, such as a bonus sales and customer's anniversary, by setting a multiple at the card terminal. These multiple functions are automatically and systematically achieved, to realize improved service and quick efficient business.

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Kawasaki, Japan

Katsumi Shimada