摘要:
In a network-device control system for controlling a network device such as a router, which is located between a communication terminal employed by a user and a server with which the terminal communicates, at a priority that has been set in advance for the user or for an application, an event notification device detects that a user has logged in to the communication terminal or that the user has launched a predetermined application from the communication terminal and reports the user identifier or the application identifier to a network-device controller. The latter acquires user priority or application priority on the basis of the reported identifier and, in accordance with the priority, controls the router on the communication path between the communication terminal and the server.
摘要:
A service assignment apparatus sets an appropriate service in a service-request-incompatible apparatus as a network element so as to guarantee the service in the entire network. A service-request-compatible apparatus processes a received network-service request, and provides a service. A network-information collection unit in the service assignment apparatus collects information on a service-provision state of the service-request-compatible apparatus. A target-apparatus determination unit determines a service-request-incompatible apparatus based on the collected information on the service-provision state. A service mapping unit determines a service which the service-request-incompatible apparatus can provide, based on the information on the service-provision state and information on the determined service-request-incompatible apparatus. A service setting unit sets the service in the service-request-incompatible apparatus.
摘要:
An IP packet relay apparatus provided between networks to relay an IP packet relating to a host belonging to a specific group, comprising: a list in which an IP address possessed by a host is associated with a group identifier for identifying a group to which the host belongs; a judgment unit judging whether an IP packet that has received from one network and is addressed to a host connected to another network is an IP packet relating to the same group or not with reference to the list; and a forwarding unit relaying an IP packet judged to be the IP packet relating to the same group.
摘要:
The same label value is assigned to all links configuring a connection in a network where an LSP (Label switched Path) is identified based on a label. Even when any one of nodes included in the connection is shortcut due to a change of route of the connection, a neighboring node to this shortcut node in the transmitting direction can receive, from a neighboring node to the shortcut node in the receiving direction, a packet having the same label value as a label value received from the LSR.
摘要:
A layer-structured MPLS path is set up in a short time by using a minimum number of control messages. A relay apparatus acting as the start point of the highest-layer L2 path creates a label request message specifying the intermediate-point and end-point relay apparatuses for all the paths of all the layers, and transmits it to the end-point relay apparatus of the L2 path. At a relay apparatus permitted to use an already established L1 path, instead of requesting a label of the L1 path, the label of the already established path is inserted in the label request message. In response to the label request message, a label mapping message is transmitted and transferred to the start-point relay apparatus. With this message, each node determines the labels associated with it and transfers them to its adjacent relay apparatus.
摘要翻译:通过使用最少数量的控制消息,在短时间内建立层结构的MPLS路径。 作为最高层L 2路径的起始点的中继装置创建指定所有层的所有路径的中点和终点中继装置的标签请求消息,并将其发送到终点中继 L 2路径的装置。 在允许使用已经建立的L 1路径的中继设备上,不是请求L 1路径的标签,所以已经建立的路径的标签被插入到标签请求消息中。 响应于标签请求消息,标签映射消息被发送并传送到起始点中继装置。 利用该消息,每个节点确定与其相关联的标签并将它们传送到其相邻的中继设备。
摘要:
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.
摘要:
A testing apparatus includes a storage to store a communication log including a communication time and a response confirmation number of packets, and a processing circuit to generate an additional packet having a communication time and a response confirmation number between two consecutive packets having an interval greater than or equal to a threshold value in the communication log. The interval may be an interval of the communication times of or, an interval of the response confirmation numbers of the two consecutive packets. The testing apparatus also includes an interface unit to send the packets stored in the storage and the additional packet to a destination at a time interval based on communication times thereof.
摘要:
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.
摘要:
A next sequence number, which is a sequence number that a next packet should have, is compared with the sequence number of a current packet, an identifier of a previous packet is compared with the identifier of the current packet, and a delay is judged to be a simple delay when the next sequence number matches the sequence number of the current packet and the identifier of the previous packet is followed by the identifier of the current packet. Or the delay is judged to be caused by a retransmission when the identifier of the previous packet is not followed by the identifier of the current packet.
摘要:
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.