Abstract: A switch device includes: a memory; and a processor coupled to the memory and configured to: identify an adjacent switch device using a function that is operable even when a function of relaying communication is inoperable; confirm communication with the adjacent switch device which is identified, by using the function of relaying communication; and determine whether or not there is a silent failure in the switch device, based on a result of the communication confirmation.

Abstract: A first node device is included in a network including a plurality of node devices including a plurality of terminals and a plurality of relay devices relaying a packet transmitted and received between the plurality of terminals. The first node device includes a memory, and a processor coupled to the memory and the processor configured to determine whether a second node device detects a possibility of disappearance of a first packet in the network, the first packet being transmitted from a third node device to the second node device, and when determining that the second node device detects the possibility, transmit first information to a respective node device on one or more paths present between the first node device and the third node device in the network, the first information requesting to determine whether the respective node device transmits or receives the first packet.

Abstract: A switch device includes: a memory; and a processor coupled to the memory and configured to: identify an adjacent switch device using a function that is operable even when a function of relaying communication is inoperable; confirm communication with the adjacent switch device which is identified, by using the function of relaying communication; and determine whether or not there is a silent failure in the switch device, based on a result of the communication confirmation.

Abstract: A first node device is included in a network including a plurality of node devices including a plurality of terminals and a plurality of relay devices relaying a packet transmitted and received between the plurality of terminals. The first node device includes a memory, and a processor coupled to the memory and the processor configured to determine whether a second node device detects a possibility of disappearance of a first packet in the network, the first packet being transmitted from a third node device to the second node device, and when determining that the second node device detects the possibility, transmit first information to a respective node device on one or more paths present between the first node device and the third node device in the network, the first information requesting to determine whether the respective node device transmits or receives the first packet.

Abstract: A first setting information notification unit notifies a management apparatus via a relay apparatus of first setting information. A setting information generation unit generates third setting information from the first setting information and second setting information. For example, the setting information generation unit generates the third setting information by complementing the first setting information with the second setting information that is preliminarily stored in a setting information storage unit. A communication confirmation unit confirms communication based on the third setting information between a first communication apparatus and a second communication apparatus. A second setting information notification unit notifies the relay apparatus, the first communication apparatus, and the second communication apparatus of the third setting information.

Abstract: A switch connected to an external device, the switch including: a plurality of ports connected to the external devices; a storage unit to store a zone database indicating a group in which each of the plurality of ports is included; and a processor to perform power control of the plurality of ports and permit communication between only ports included in the same group, on the basis of the zone database, wherein the processor powers off a port that is not included in any group among the plurality of ports, on the basis of the zone database.

Abstract: A first setting information notification unit notifies a management apparatus via a relay apparatus of first setting information. A setting information generation unit generates third setting information from the first setting information and second setting information. For example, the setting information generation unit generates the third setting information by complementing the first setting information with the second setting information that is preliminarily stored in a setting information storage unit. A communication confirmation unit confirms communication based on the third setting information between a first communication apparatus and a second communication apparatus. A second setting information notification unit notifies the relay apparatus, the first communication apparatus, and the second communication apparatus of the third setting information.

Abstract: In a communication control apparatus, a first receiving unit receives a registration request packet which is generated so as to enable the communication control apparatus to recognize an access requested apparatus, and if determining that the access requested apparatus recognized from the registration request packet exists in a network, registers first identification information identifying an access requesting apparatus which is included in the registration request packet, in a storage unit. A second receiving unit receives an explorer packet, and if determining that first identification information included in the explorer packet has been registered in the storage unit, sends second identification information identifying the own apparatus to the access requesting apparatus.

Abstract: An L2 switch includes a storage unit, a detection unit, a selection unit, and a notification unit. The storage unit stores a plurality of relay paths connecting a source device and a destination device that receives information from the source device. The detection unit detects occurrence of congestion between the host L2 switch and an adjacent L2 switch in a first path among the plurality of relay paths. The selection unit selects a second path from among the plurality of relay paths in the case where the occurrence of congestion has been detected. The notification unit notifies, through an L2 switch adjacent to the host L2 switch in the second path, an L2 switch adjacent to the source device that the second path is to be used as a detour path.

Abstract: A connection control apparatus includes an active control unit that performs routing of data to a first device connected to a port of the connection control apparatus by using an address of the first device, and a standby control unit that, when the active control unit causes a failure, performs routing of data to the first device by using the address of the first device and by using route information indicating a connection route to a second device connected to a port of an adjacent connection control apparatus connected to the connection control apparatus, the standby control unit performing routing of data to the second device by using the route information upon the adjacent connection control apparatus being unable to perform routing.

Abstract: A switch connected to an external device, the switch including: a plurality of ports connected to the external devices; a storage unit to store a zone database indicating a group in which each of the plurality of ports is included; and a processor to perform power control of the plurality of ports and permit communication between only ports included in the same group, on the basis of the zone database, wherein the processor powers off a port that is not included in any group among the plurality of ports, on the basis of the zone database.

Abstract: A communication controller that controls communications in a network, includes: a determiner that determines that a congestion occurs in the network; and a transmitter that transmits a signal instructing to adjust a traffic volume to a party to which the congestion is attributable. An information processing apparatus and a storage apparatus each include the communication controller. A method of controlling communications and a tangible and non-transient computer-readable storage medium having a communication control program stored therein are disclosed.

Abstract: A user terminal reads out an encrypted content from a removable memory medium, assigns data forming the read encrypted content to the same hash function, and computes a first hash value. The management apparatus acquires the computed first hash value and management information from the user terminal, reads out, from a management information memory that stores a second hash value previously computed by assigning data forming the encrypted content retaining its authenticity to the hash function in association with the management information, the corresponding second hash value by using the acquired management information as a retrieval key, authenticates whether the acquired first hash value and the second hash value are identical, and permits a decryption process when the authentication result is an authentication success.

Abstract: An L2 switch includes a storage unit, a detection unit, a selection unit, and a notification unit. The storage unit stores a plurality of relay paths connecting a source device and a destination device that receives information from the source device. The detection unit detects occurrence of congestion between the host L2 switch and an adjacent L2 switch in a first path among the plurality of relay paths. The selection unit selects a second path from among the plurality of relay paths in the case where the occurrence of congestion has been detected. The notification unit notifies, through an L2 switch adjacent to the host L2 switch in the second path, an L2 switch adjacent to the source device that the second path is to be used as a detour path.

Abstract: A switching device includes a storage unit configured to store management information including an updated management information and a before updated management information, a specification unit configured to acquire an information for specifying management information stored in a management device which manages a failure that has occurred in an object device for the failure to be monitored and specify management information stored in the storage unit on the basis of the acquired information, and an information sending unit configured to send a failure information to the management device on the basis of the management information which has been specified using the specification unit in the case that the failure has been detected.

Abstract: A connection control apparatus includes an active control unit that performs routing of data to a first device connected to a port of the connection control apparatus by using an address of the first device, and a standby control unit that, when the active control unit causes a failure, performs routing of data to the first device by using the address of the first device and by using route information indicating a connection route to a second device connected to a port of an adjacent connection control apparatus connected to the connection control apparatus, the standby control unit performing routing of data to the second device by using the route information upon the adjacent connection control apparatus being unable to perform routing.

Abstract: A storage management apparatus controls the storage device such that data is redundantly stored in each of an opened area and a closed area. The storage management apparatus includes an area laying-open unit and a re-redundancy unit. The area laying-open unit deletes or compresses data stored in the at least two closed areas, converts one of the closed areas into the opened area and writes data corresponding to a write request to the opened area and to at least the other of the closed areas, if a capacity of the storage device reaches a given value. The re-redundancy unit converts memory area of an add-on storage device into the closed area and copies data in an opened area, placed in a redundant-storing relationship with the data deleted or compressed by the area laying-open unit, to the closed area, if the storage device is added on.

Abstract: In a communication control apparatus, a first receiving unit receives a registration request packet which is generated so as to enable the communication control apparatus to recognize an access requested apparatus, and if determining that the access requested apparatus recognized from the registration request packet exists in a network, registers first identification information identifying an access requesting apparatus which is included in the registration request packet, in a storage unit. A second receiving unit receives an explorer packet, and if determining that first identification information included in the explorer packet has been registered in the storage unit, sends second identification information identifying the own apparatus to the access requesting apparatus.

Abstract: A switching device includes a storage unit configured to store management information including an updated management information and a before updated management information, a specification unit configured to acquire an information for specifying management information stored in a management device which manages a failure that has occurred in an object device for the failure to be monitored and specify management information stored in the storage unit on the basis of the acquired information, and an information sending unit configured to send a failure information to the management device on the basis of the management information which has been specified using the specification unit in the case that the failure has been detected.

Abstract: A storage management apparatus controls the storage device such that data is redundantly stored in each of an opened area and a closed area. The storage management apparatus includes an area laying-open unit and a re-redundancy unit. The area laying-open unit deletes or compresses data stored in the at least two closed areas, converts one of the closed areas into the opened area and writes data corresponding to a write request to the opened area and to at least the other of the closed areas, if a capacity of the storage device reaches a given value. The re-redundancy unit converts memory area of an add-on storage device into the closed area and copies data in an opened area, placed in a redundant-storing relationship with the data deleted or compressed by the area laying-open unit, to the closed area, if the storage device is added on.