Fujitsu Corporation

Kenji Hikichi

Shinya Kano

Toshio Soumiya

Shinji Yamashita

Akiko Yamada

There is provided a communication control device for controlling a communication device on a communication network, the communication control device including: a memory; a processor coupled with the memory and configured to: divide a route for a communication with the communication device into a plurality of sections; determine a communication control device for a failure recovery in a section of the plurality of sections, the communication control device for the failure recovery restoring a failure in the section of the plurality of sections; specify a section of the plurality of sections where the failure occurs when the failure is detected on the route; transmit failure information to the communication control device for the failure recovery corresponding to the section specified; and set a detour to the failure in the section, based on the failure information.

Communication control device and communication system

An information processing apparatus comprising a first processor configured to, for each of a plurality of control apparatuses, determine weights to be used for distribution of requests for predetermined processing so that a larger amount of requests for the predetermined processing is distributed to a control apparatus controlling a larger number of destination apparatuses. Each of the plurality of control apparatuses includes a second processor configured to: receive a request distributed to own control apparatus; perform the predetermined processing according to the request; create a message; transmit the message to a destination apparatus that is a destination of the message when a control apparatus controlling the destination apparatus is the own control apparatus; and forward the message to another control apparatus when the control apparatus controlling the destination apparatus that is a destination of the message is the other control apparatus.

Information processing apparatus and load distribution control method

A network control apparatus is configured to detect connection relationships among a plurality of network switches in a communication network. The network control apparatus transmits a control signal to a first network switch, where the control signal commands the first network switch to transmit a first topology detection signal from a first plurality of ports provided for the first network switch. The network control apparatus receives, from a second network switch that has received the first topology detection signal, a response signal including topology information that has been detected by the second network switch from the first topology detection signal, and, based on the topology information included in the response signal, controls selection of a target port, via which to transmit a second topology detection signal, from among a second plurality of ports provided for the second network switch.

Apparatus and method for detecting connection relationships among switches in a communication network

A transfer device that is installed in a unit network that includes a gateway includes a sending/receiving unit that sends/receives a frame to/from a transfer device that is installed in another unit network in a network that includes the unit network, a determining unit that determines, based on destination address or source address in a packet in the frame sent/received by the sending/receiving unit, whether the packet is related to communication between an internal device that is installed in the network and an external device that is installed outside the network, and a notifying unit that notifies, when the determining unit determines that the packet is related to the communication between the internal device and the external device, the external device of an instruction to switch a gateway.

Transfer device, communication system, and roundabout path detecting method

A router apparatus connecting a first network and a second network including a storage unit which stores association information associating an address of one of a plurality of second router apparatuses with an address of a corresponding one of a plurality of server apparatuses with an identical address, each of the plurality of second router apparatus connecting the first network to each of a plurality of third networks to which the respective plurality of server apparatuses is connected, a receiving unit which receives a packet transmitted from a terminal apparatus and transferred via the second network, an encapsulating unit which encapsulates the packet received into a packet with a destination address corresponding to the address of the second router apparatus associated with an address of the packet based on the association information, and a transmitting unit which transmits the packet encapsulated by the encapsulating unit to the first network.

Router apparatus, communication system and packet transfer method

An apparatus translates a destination address of a first packet that is transferred from an external communication device in an external network to an internal communication device in an internal network through the external network, from an external-network address that has been assigned to the internal communication device using an addressing scheme for the external network, to an internal address that has been assigned to the internal communication device using an addressing scheme for the internal network. The apparatus transmits, to another apparatus, address information including the external-network address and identifier information for identifying the external communication device where the another apparatus is configured to translate a source address of a second packet that is transferred from the internal communication device to the external communication device, from the internal address to the external address.

Apparatus and method for translating an address of a packet transferred between networks

A management device determines, in response to a request, given from a requester terminal included in a plurality of terminals, for determining an information distributor to distribute request target information, any one of a server and a relay terminal to retain the request target information as the request target information distributor, and instructs the requester terminal and the relay terminal determined to be the distributor to determine, based on a status of a route which connects the server, the relay terminal and the requester terminal, whether the request target information can be held or deleted after having the request target information distributed.

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Kawasaki, Japan

Kenji Hikichi