Abstract: A non-transitory computer-readable recording medium stores a data processing program for causing a computer to execute processing including: specifying one of boundaries between two adjacent attributes in processing target table data on the basis of association information that indicates a combination of two associated attributes among a plurality of attributes generated by analyzing analysis target table data that includes an attribute value of each of the plurality of attributes; and outputting boundary information that indicates the one of boundaries.

Abstract: A non-transitory computer-readable recording medium stores a data processing program for causing a computer to execute processing including: obtaining a similarity between each of a plurality of attributes included in first table data and each of a plurality of attributes included in second table data; and associating each of the plurality of attributes included in the first table data with any attribute of the plurality of attributes included in the second table data on the basis of the similarity, an order of the plurality of attributes included in the first table data, and an order of the plurality of attributes included in the second table data.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A communication control method executed by a system including a plurality of nodes, a plurality of communication control devices, a network control device and a load control device, the method includes transmitting, by the load control device, a request instructing update of destination information to the plurality of communication control devices and the network control device; starting, by each of the plurality of communication control devices and the network control device, update of the destination information; completing the update by a communication control device in the plurality of communication control devices; receiving, by the communication control device, a control message transmitted from the network control device; extracting a target control device that controls a target node from the plurality of communication control devices stored in the destination information; and transferring the control message to the target control device when the target control device is not the communication control d

Abstract: A control device configured to control a plurality of network switches provided in a plurality of communication paths including a first communication path and a second communication path, the control device includes a memory, and a processor coupled to the memory and configured to control the plurality of network switches so that one or more data flows pass through the first communication path, monitor a load of the control device, detect that a failure occurs in the first communication path, and determine, based on a number of the one or more data flows and the load of the control device, a path selecting method of selecting the second communication path as an alternative communication path through which the data flows are to be transmitted.

Abstract: 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.

Abstract: A network management apparatus including: a processor configured to: classify a plurality of communication devices in a network into a plurality of groups based on each combination of each type of packet processing performed in each of the plurality of communication devices and each type of packet processing performed in each transfer destination of each of the plurality of communication devices, set at least one virtual subnetwork so that a virtual subnetwork, which couples to at least one first communication device in a first group and at least one second communication device in a second group, is set when the at least one first communication device transfers a packet to the at least one second communication device, and transmit a control packet for communications via the virtual subnetwork, to the at least one first communication device and the at least one second communication device.

Abstract: 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.

Abstract: An information processing apparatus that sets, based on packet identification information that is common to packets included in a packet group that flows through a network including the communication devices performing relaying, and information about network function devices selected by the packet group, each of the network function devices being connected to the communication devices via a layer 2 network, performing a predetermined process for a packet and performing input and output of the packet by a same interface, one of interfaces of the communication devices as a forwarding destination of a packet input to the network function device in such a way that there is no overlap between the network function devices selected by the packet group and in such a way that overlap with another network function device selected by another packet group is allowed.

Abstract: 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.

Abstract: A communicating unit communicates with a plurality of first relay apparatuses belonging to a first network and being options of a transfer destination of data addressed to a second network connected to the first network. A control unit acquires, from each of the first relay apparatuses, distance information indicating distance between the first relay apparatus and a second relay apparatus connected to the first and the second network. Subsequently, the control unit selects the transfer destination of the data amongst the first relay apparatuses based on the distance information.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A communication control method of a communication system including a first communication device, a first relay device coupled to the first communication device via a first network which is a network domain where a message broadcast from the first communication device reaches and where communication based on physical addresses is performed, and a second communication device belonging to the same logical network to which the first communication device belongs, the communication control method including: broadcasting, by the first communication device, a first request including a logical address assigned to the second communication device and requesting a physical address assigned to the second communication device, transmitting, by the first relay device, in the event that the second communication device is not coupled to the first network, a first response which is a response to the first request and includes a predetermined physical address, to the first communication device.