Abstract: A verification device that is used in a system in which a first device and a second device communicate using a physical communication path that includes at least one switch among switches included in a plurality of switch clusters and does not include a plurality of switches that belong to a different switch cluster among the plurality of switch clusters, the verification device including a verification unit that verifies whether switches included in a first communication path and a second communication path that are communication paths used for communication between the first device and the second device are included in the same switch cluster, and an output unit that outputs a result of the verifying.

Abstract: A network looping detecting apparatus has an increased real-time operation capability for network looping detection and also has scalability. The network looping detecting apparatus has a count information acquiring unit for periodically acquiring count information which is counted up when the lifetime of a packet has elapsed, from a network device of a network to be monitored for network looping. The network looping detecting apparatus also has a looping detecting unit for detecting network looping from the count information. Specifically, the network looping detecting apparatus detects network looping based on the fact that when a packet loops due to network looping, the lifetime of the packet elapses, and the count information is counted up.

Abstract: A determination apparatus includes a processor and a storage unit. The processor acquires through a communication network a request packet transmitted from a client device to a server device group or a reply packet transmitted from the server device group to the client device. The server device group includes a first server device and one or more second server devices. The first server device is connected to the client device through the communication network. The storage unit stores configuration information for determining a source of the acquired reply packet. The processor determines whether the source of the acquired reply packet is the first server device or one of the second server devices on the basis of the configuration information stored in the storage unit.

Abstract: A data conversion device includes a receiving unit which receives first data and first sequence information and second data and second sequence information that are transmitted from a first device to a second device, the first sequence information indicating that the first data is transmitted before the second data and the second sequence information indicating that the second data is transmitted after the first data, a transmitting unit that transmits the received first data and second data to a third device, and a control unit that instructs the transmitting unit to transmit the first data and the second data to the transmitting unit in accordance with a sequence indicated in the first sequence information and the second sequence information.

Abstract: A computer-readable medium stores a program causing a computer to execute acquiring a transmission interval for packets transmitted from a first-source to a first-destination; judging whether a given packet, among the packets whose destination has been changed to a second-destination are transmitted from a second-source, is a designated-packet requiring acknowledgment for the preceding packet; transmitting the given packet after acknowledgment is received, if acknowledgment is required; correcting an interval between the designated-packet and the subsequent packet, to be shorter than intervals for 2 packets transmitted from the first-source to the first-destination and corresponding to the designated-packet and the subsequent packet, if an interval between transmission of the preceding packet and transmission of the designated-packet exceeds intervals for 2 packets transmitted from the first-source to the first-destination and corresponding to the preceding packet and the designated-packet; and transmitting t

Abstract: An information processing apparatus receives a request transmitted from a client to a server and a response transmitted from the server to the client. The information processing apparatus includes a processor. The processor counts a first number of first requests having no corresponding response within a first time period, counts a second number of second requests having a corresponding response, and detects a failure in the server on the basis of the first number and the second number.

Abstract: An error detection device includes a control unit configured to identify two links that connects a relay communication device to two communication devices as a link pair, identify, from pluralities of inspection devices under the respective two links, a number of inspection devices corresponding to the number N of links where communication errors simultaneously occur (N is an integer of 1 or more) plus 1, determine (N+1) number of inspection flows between the (N+1) number of inspection device pairs, and generate inspection coverage information that includes the determined inspection flows. The error detection device includes a storage unit that stores the inspection coverage information, and a communication unit that sends the inspection coverage information to one device of the inspection device pairs.

Abstract: For controlling a traffic on a network including a plurality of links, the apparatus includes a collecting unit that collects information on the traffic for each of the links periodically; an acquiring unit that acquires basic data collected from a link for a predetermined period; and a predicting unit that predicts a future traffic on the link based on the basic data. The start time of the predetermined period is the time when the latest control of the traffic was performed on the link or other link adjacent to the link.

Abstract: A non-transitory computer-readable recording medium storing therein a test program causing a computer to execute a process including acquiring a first packet and a second packet sent to a first device; transmitting, based on the acquired first packet, a third packet obtained by setting a destination of the first packet to a second device; and transmitting, based on the acquired second packet, a fourth packet obtained by setting a destination of the second packet to the second device, the fourth packet being transmitted upon elapse of a period from the transmission of the third packet and equal to a time interval between acquisition of the first packet and acquisition of the second packet.

Abstract: Only when a request formed of a plurality of request packets obtained by dividing the request is reconstructed, the request is transmitted to a survey target node that returns a response formed of a plurality of response packets obtained by dividing the response. When no response packet has been received at all from the survey target node, it is determined that any of the request packets has been discarded on a first route from a surveying node as a transmission source of the request to the survey target node. When one or more response packets have been received from the survey target node but the response cannot be reconstructed, it is determined that any of the response packets transmitted from the survey target node has been discarded on a second route from the survey target node to the surveying node as the transmission source of the request packets.

Abstract: A data conversion device includes a receiving unit that receives first data and second data, transmitting after a start of the first data, transmitted from the first device to the second device, a transmitting unit that transmits the received first data and second data to a third device, and a control unit that controls a time point of transmitting the second data from the transmitting unit to lengthen a time interval between transmission of the first data and second data from the transmitting unit than a first time interval between transmission of the first data from the transmitting unit and reception of response data to the first data by the receiving unit when the first time interval is longer than a time interval between the transmission of the first data and second data from the first device to the second device.

Abstract: A computer-readable non-transitory recording medium storing therein an information managing program causing a computer to execute extracting from among events that have occurred at objects under management and having dependence relations, combinations of a first event that has occurred at a source-of-dependence object and a second event that has occurred at a dependent object dependent on the source-of-dependence object; judging for each extracted combination, whether a dependence relation exists between the first event and the second event, by using the difference between the time of occurrence of the first event and that of the second event; determining from among the events and based on a judgment result obtained at the judging, an event that has occurred at an object that is a source-of-dependence object but not a dependent object, to be an event to be stored; and storing to a database, information related to the event to be stored.

Abstract: When a server RM detects a failure in an operating server, a system resource manager selects a substitute server from a pool of a server domain to which a failed server belongs, based on information in a system resource DB, disconnects the failed server from a business network and a storage sub group and moves the failed server to a pool, and permits the substitute server to access a storage group to which the failed server had an access and to connect to the business network to which the failed server was connected, to boot up the substitute server from a SAN.

Abstract: A network group determination device includes an acquisition section, a comparison section and a determination section. The acquisition section acquires first communication information representing a state of communication between a first repeater on a network and a specific network group on the network, and second communication information representing a state of communication between a second repeater on the network and the network group. The comparison section makes a comparison of a difference between the first communication information and the second communication information to third communication information between the first repeater and the second repeater. The determination section makes, according to a result of the comparison by the comparison section, a determination of a position of the network group with respect to the first repeater and the second repeater.

Abstract: A CPU executes a process including determining a core node among plural relay nodes on a basis of route information, acquiring a first and a second packets flowing between a server and a terminal apparatus, the second packet being transmitted on a basis of the first packet, calculating a first delay time on a basis of the first and the second packets, the first delay time relating to packet transmission between the server and the terminal apparatus, transmitting a third packet to the core node, receiving a response to the third packet from the core node, calculating a second delay time on a basis of the third packet and the response, the second delay time being a delay time of the core node, and calculating a third delay time being a delay time of an end node on a basis of the first and the second delay times.

Abstract: A monitoring apparatus for monitoring packet communication by a plurality of information processing apparatuses. The monitoring apparatus includes a receiving unit for receiving packets transmitted from the plurality of information processing apparatuses, a storage unit for storing a first identification value of a first packet and a first transmission source address of the first packet, and a processing unit for comparing a second identification value of a second packet with the first identification value of the first packet when a second transmission source address of the second packet matches the first transmission source address of the first packet to detect duplication of IP addresses when a difference between the first identification value and the second identification value exceeds a predetermined value.

Abstract: An imaging apparatus includes an imaging unit operable to capture a subject image to generate image data, a controller operable to calculate a target exposure value based on the image data and control exposure based on a first shooting parameter set by a user to obtain the target exposure value, and a display unit operable to provide a display. The controller calculates a first suitable range which is a range of the first shooting parameter for obtaining the target exposure value, and calculates a second shooting parameter based on the target exposure value and the first shooting parameter set by the user. The display unit displays exposure guide information including the first shooting parameter set by the user, information representing the first suitable range, and the calculated second shooting parameter.

Abstract: An abnormality locating apparatus locates an abnormal location in a network. An abnormal location judging part judges a normality or abnormality of a link based on a normality or abnormality of an observation flow, by acquiring information of links through which each observation flow passes, from a network route information storage that stores passing route information of observation flows passing through the links. A diagnosis accuracy judging part judges that an accuracy of judging the normality or abnormality of a connecting link connected to a first node deteriorates, by acquiring links connected to each relay node as connecting links from a relay node connecting link information storage that stores connecting link information of each relay node, and judging that a relay node having all connecting links thereof that are abnormal is the first node having all observation flows passing therethrough that are abnormal.

Abstract: Communication quality values such as delay times of packets transmitted and received within a packet network are measured, and a threshold value is calculated based on the measured communication quality values. Further, a management reference value is calculated based on the communication quality values of packets whose measured communication quality values are within a range based on the threshold value. A communication state is detected by comparing the measured communication quality values with the management reference value.

Abstract: A network fault detection apparatus, which detects L2 loops due to L3 bridge connections, is provided. A network fault detection apparatus acquires physical addresses corresponding to the network addresses of at least two nodes among the plurality of nodes constituting a network, and by detecting the existence of a plurality of physical addresses for network addresses of the two nodes, and detecting the existence of a physical address common to network addresses thereamong, detects an L2 loop caused by an L3 bridge connection, which induces a network fault.