Abstract: A stream information setting unit (108) sets, with respect to a plurality of information collection object apparatuses, either a first transmission setting of a first data transmission of which a transmission cycle is designated or a second transmission setting of a second data transmission which uses a predetermined transmission cycle. A telemetry data receiving unit (106) receives data from the information collection object apparatuses by the first data transmission executed according to the first transmission setting and the second data transmission executed according to the second transmission setting performed by the stream information setting unit (108). A measuring unit (103) measures a transmission time of data by the first data transmission. A comparing unit (104) determines whether or not the transmission time measured by the measuring unit (103) exceeds the designated transmission cycle.

Abstract: When a controller receives a tunnel setting order from a high-order Ops (operation system), the controller divides the setting order into a first setting processing step related to setting registration of a user, a second setting processing step related to a transfer surface of the tunnel, a third setting processing step related to an interface of each transfer apparatus used for a tunnel of the transfer surface, and a fourth setting processing step related to a parameter to be set to the interface and stores the setting processing steps in a setting management DB. Subsequently, the controller creates a configuration for executing each setting processing step indicated in the tunnel setting order by reflecting information indicated in each divided setting processing step to a template of each setting processing step. In addition, the controller inputs the created configuration to a transfer apparatus at a setting destination of the tunnel.

Abstract: An extraction unit extracts predetermined information from an outer header and an inner header of a tunneled packet passing through a network device in which congestion has occurred. An evaluation unit evaluates an order in which fine grain flows in a tunnel subdivided with reference to the extracted predetermined information are subject to TE, based on attribute information of the fine grain flows.

Abstract: A design apparatus optimizes, with a first granularity (for example, a real number solution), a traffic volume allocated to each of links between adjacent nodes included in a network. In addition, the design apparatus calculates an approximation solution obtained by approximating, with a second granularity (for example, an integer solution), the traffic volume having been optimized with the first granularity. Furthermore, the design apparatus maps logical paths to each of routes constituted by the links in accordance with the approximated traffic volume.

Abstract: A filter setting device (20) includes a shared filter DB (21) having a shared filter information table (211) in which information of each shared filter is recorded and a shared filter application destination table (212) in which a transfer device of an application destination of each shared filter is recorded; a shared filter creation unit (22) for determining new creation of a shared filter or diversion of an existing shared filter by referring to a shared filter information table (211) and a shared filter application destination table (212) on the basis of an instruction of a host server (10), in the L3 transfer technology; and a configuration input unit (23) for generating a configuration on the basis of a determination result of the shared filter creation unit (22), and setting a shared filter to be shared among a plurality of IF in a transfer device (30).

Abstract: A route calculation device (1) includes: an input unit (11) that receives input parameters including an index for selecting a path to be set in a communication system (20); a route calculation unit (12) that selects a reference path based on the index and preferentially selects, from among one or more other paths each of which passes through a route different from the reference path, a path having a lower degree of sharing a router through which the reference path passes; and a route setting unit (15) that sets the reference path and the another path selected by the route calculation unit (12) in the communication system (20).

Abstract: The network control system 100 includes an NW state measurement part 111 which measures a network topology, a delay amount of each link, a jitter, a traffic amount, and a link band and makes an NW state holding DB 112 holding them as NW state information, and an NW design information holding DB 132 which holds a quality requirement including an endpoint, a delay amount, and jitter, and information on a necessary band, as a design information of each NW, and a route calculation unit 121 which calculates an optimum route with quality requirements as constraint conditions on the basis of the NW state information held in the NW state holding DB 112 and the NW design information held in the NW design information holding DB 132, and a route control unit 131 on the basis of the route information calculated by the route calculation unit 121.

Abstract: A software update management apparatus includes a storage unit adapted to divide a network into one or more blocks and store block management information indicating whether each of network devices belonging to each of the resulting blocks is an active device or a standby device; an update instruction receiving unit adapted to receive software update instructions; a software update information generating unit adapted to generate software update information; a software updating unit adapted to perform software update processes after transferring traffic to standby devices in same blocks as respective active devices when it is determined that the network devices are active devices according to the software update information and thereby perform the software update processes for active devices or standby devices in different blocks in parallel.

Abstract: A transfer device is capable of outputting packets to a plurality of physical lines, and includes a measurement unit configured to measure performance of network requirements specified by a given service for each physical line; and a selection unit configured to select the physical line at which the measured performance is maximized from among the plurality of physical lines. A transfer control device includes an instruction unit configured to receive an advertisement including route information for selecting a route for each network requirement from a transfer device that outputs packets to a plurality of physical lines, and to offer a route instruction using the route information to a service for which the requirement is specified.

Abstract: A delay measurement device (3) measures a delay time of an end-to-end route path of a virtual private network related to a predetermined user.

Abstract: A performance monitoring device enables performance monitoring by transfer delay monitoring of a virtual server that operates on a physical server including a physical resource and provides a network function. A performance monitoring device includes: a deployment unit that causes, in a case where the number of the virtual server is one, a measurement virtual server using the same physical resource as the physical resource of the virtual server to operate on the physical server; a path setting unit that sets the measurement virtual server to transmit a response packet to the performance monitoring device for a measurement packet; and a measurement unit that measures a first transfer time from when the measurement packet is transmitted to the measurement virtual server until the response packet is received.

Abstract: An edge switching device of an edge switching system includes: a remaining lease time information obtainment unit configured to obtain remaining lease time information for each of user terminals from a DHCP server; a submission order determination unit configured to determine a submission order for user configuration information in order from a shortest remaining lease time; a user configuration information submission unit configured to submit, to a backup system edge router, user configuration information of each of the user terminals, according to the determined submission order; and a reconnection inducement instruction unit configured to send, to the DHCP server, an instruction to send reconnection inducement information to the user terminals for which the user configuration information has been submitted.

Abstract: A network monitoring apparatus sets monitoring targets that are physical interfaces included in leaf nodes and spine nodes, links connecting the leaf nodes and the spine nodes, transfer function units included in the spine nodes, and an overlay tunnel set between the originating-side leaf node on the terminating-side leaf node, aggregates monitoring results at the respective monitoring targets, and determines the failure type of a failure and the degree of influence of the failure on the basis of the type of the monitoring target in which the failure has occurred and the occurring event.

Abstract: A latency measurement apparatus (10) includes a topology detection unit (13) that collects routing information from a NW (30) to which a plurality of nodes are connected to detect topology information, a path determination unit (14) that determines inter-node path information based on the topology information, a test packet generation unit (15) that generates a test packet, a marking unit (20) that performs time-keeping with a time-keeping unit (19), marks the test packet with transmission time information based on the time-keeping when the test packet is transmitted to the path according to the inter-node path information, and marks the test packet with reception time information based on the time-keeping when the test packet is received from the path, and a latency calculation unit (17) that calculates a latency time from a difference between the marked transmission time information and reception time information and stores the calculated latency time information in a DB (16) in association with the path in

Abstract: A communication latency measurement apparatus (10) includes a packet generation unit (12) that generates an SRT packet (packet) to be transmitted to an NW 30 to which a plurality of routers (1r to 6r) by recording path information including an ID of a router serving as a round-trip transfer destination of the packet, a time keeping unit (13) that keeps a time, a transmission/reception unit (11) that records a time kept when the packet is transmitted and/or received as a timestamp for each of transmission and reception in the generated packet, a latency calculation unit 14 that calculates a latency time on a round-trip path from a difference between the transmission and reception timestamps recorded in the received packet and store the latency time in a DB 15 in association with the path information, and a specific segment latency calculation unit 17 that calculates a latency time in a specific router segment from a difference between the stored latency time information of a round-trip path (arrow Y2) includin

Abstract: A network 50 is hierarchically divided into network devices 501 to 506, areas, and the like to be monitoring targets, and a monitoring device 100 monitors a divided monitoring target. A monitoring device of an N-th layer (here, N?2) that is an upper layer with respect to a first layer monitors information of reachability between user connection points received from a monitoring device of an (N?1)-th layer that is a lower layer and network devices connecting monitoring targets of the (N?1)-th layer making up monitoring targets of the N-th layer and connection statuses between the network devices and areas that are monitoring targets. The monitoring device determines the presence/absence of reachability between user connection points belonging to different monitoring targets of the (N?1)-th layer on the basis of this reachability and the connection statuses.

Abstract: An edge switching device (10) of an edge switching system (1000) includes: a remaining lease time information obtainment unit (122) that obtains remaining lease time information for each of user terminals (4) from a DHCP server (30); a submission order determination unit (123) that determines a submission order for user configuration information in order from a shortest remaining lease time; a user configuration information submission unit (124) that submits, to a backup system edge router (2B), user configuration information of each of the user terminals (4), according to the determined submission order; and a reconnection inducement instruction unit (125) that sends, to the DHCP server, an instruction to send reconnection inducement information to the user terminals for which the user configuration information has been submitted.

Abstract: A routing control device (1) includes: a configuration management unit (11) configured to generate NW configuration information (t1) that indicates a configuration of a communication network via which predetermined services are provided; a calculation unit (12) configured to calculate, based on the NW configuration information (t1), routes that have a minimum transmission delay between nodes disposed in the communication network; and a setting unit (13) configured to set a calculated route for a low latency service that requires an allowable value of transmission delay to be less than or equal to a predetermined value, out of the services.

Abstract: Disclosed herein are log information collection methods for collecting log information of a network device operating in accordance with instructions from an operation apparatus. In some cases, the log information collection method can comprise: determining whether another piece of the log information including a second character string occurs in a predetermined duration, wherein the niece of log, information includes a first character string; generating a new piece of log information including a third character string; and accepting specifications of the first, second, and third character strings, the predetermined duration, and occurrence or non-occurrence of the piece of the log information and the other piece of the log information.

Abstract: To ensure efficiency of software update operations while maintaining reliability of an entire network during the software update operations. A software update management apparatus 1 includes a storage unit 12 adapted to divide a network into one or more blocks and store block management information 100 indicating whether each of network devices belonging to each of the resulting blocks is an active device or a standby device; an update instruction receiving unit 101 adapted to receive software update instructions; a software update information generating unit 102 adapted to generate software update information 200; a software updating unit 103 adapted to perform software update processes after transferring traffic to standby devices in same blocks as respective active devices when it is determined that the network devices are active devices according to the software update information 200 and thereby perform the software update processes for active devices or standby devices in different blocks in parallel.