Nec Corporation

Yoichi Hatano

Kentaro Sonoda

Takayuki Sasaki

Hideyuki Shimonishi

Yoichiro Morita

Masayuki Nakae

Masaya Yamagata

Takeo Ohno

Toshio Koide

Yasuhiro Mizukoshi

Yuki Ashino

Yasuhiro Yamasaki

Takeo Hayashi

Toshiki Watanabe

Remi Numajiri

A network management apparatus that connects to a terminal by way of a communication apparatus, includes: a legitimate information generation unit configured to generate legitimate identification information that is identification information to identify the terminal on a network that the network management apparatus manages, the legitimate identification information being managed as legitimate information by the network management apparatus; a fake information generation unit configured to generate fake identification information that is different from the legitimate identification information and that cannot be used as it is for communication with another terminal; a management unit configured to manage the legitimate identification information and the fake identification information in association with each other; and a registration unit configured to register the fake identification information to the terminal.

Network management apparatus, network management method, and recording medium

A control execution apparatus is provided with a communication unit that makes an inquiry concerning a packet processing method with respect to a predetermined control instruction apparatus, and a packet processing unit that processes packets based on an instruction from the control instruction apparatus. The control instruction apparatus is provided with a communication history management unit that manages communication history between nodes via the control execution apparatus, a node state determination unit that determines, making reference to the communication history of the communication history management unit, whether or not a node that is a transmission source or a transmission destination of the packet for which an inquiry concerning a processing method was received, is on a side that provides a service to another node, and a control instruction unit that prohibits, when at least the node is on the side that provides a service to another node, new communication from the node in question to the other node.

Communication system, control instruction apparatus, communication control method and program

A visualization device is communicable with one or a plurality of host servers for hosting a virtual system, and includes an information acquisition unit for collecting configuration information on the virtual system and the host server, a storage unit for storing the configuration information therein, and a drawing unit for expressing a virtual machine and a virtual network configuring the virtual system with different axes based on the configuration information stored in the storage unit, expressing a connection relationship between a virtual machine and a virtual network by linking the lines extending from the respective axes, and grouping virtual machines in units of server on which the virtual machines operate thereby to generate drawing information for expressing the configuration of the virtual system and the host server.

Visualization system and visualization method

A communication system includes: a control apparatus setting control information in a forwarding node(s); a forwarding node(s); and an access control apparatus. The forwarding node(s) forwards packets by using first control information set by the control apparatus and second control information for forwarding packets that do not match a matching condition(s) in the first control information set by the control apparatus from a predetermined port of the forwarding node(s). The access control apparatus includes a determination unit determining whether to generate control information for the packets forwarded from the predetermined port of the forwarding node(s) and requesting the control apparatus to generate control information.

Communication system, access control apparatus, switch, network control method, and program

A apparatus management system includes: a forwarding node(s) that supplies identification information that uniquely identifies an individual terminal to a terminal management apparatus that manages the identification information; and the terminal management apparatus that discloses the identification information about a terminal to a corresponding user, requests the user to register himself/herself as a user of the terminal from a second terminal different from the terminal, and holds associates the terminal in association with the user.

Apparatus management system, apparatus management method, and program

A communication system, includes: a node that requests a processing rule for processing a packet; and a control apparatus that notifies the node of the processing rule in response to the request. The control apparatus, upon being notified of change of a connection relationship between a communication apparatus to which a packet is addressed and the node, determines a forwarding path for a packet addressed to the communication apparatus and notifies the node of a processing rule for realizing the forwarding path.

Communication system, control apparatus, communication apparatus, communication control method, and program

Visualization device, visualization system, and visualization method

A communication terminal comprises: first means that communicates with a network system that includes a forwarding apparatus forwarding a packet and a control apparatus informing the forwarding apparatus of a processing rule prescribing a packet processing method; second means that determines a processing operation to be executed by the network system from among packet processing operations to be executed by the communication terminal; and third means that informs the forwarding apparatus of a processing rule corresponding to the determined packet processing operation.

Communication terminal, method of communication and communication system

A network management service system includes a policy management apparatus that receives updating of a communication policy from an user and manages the communication policy for each user; a control apparatus that generates a packet handling operation of a packet associated with the communication policy of the user, in response to a request from the user, and sets the generated packet handling operation in a forwarding node(s); and the forwarding node(s) that processes the packet using the packet handling operation generated by the control apparatus.

Network management service system, control apparatus, method, and program

A route request mediation apparatus comprises a resource management unit that manages a resource of a network to be managed; a request receiving unit that receives a route request with an added service level condition from a user or another route request mediation apparatus; a negotiation status management unit that forwards the route request to a destination specified by the route request, and manages a negotiation status based on a response from the destination; an acceptance assessment unit that assesses whether or not to accept the route request by referring to the negotiation status managed by the negotiation status management unit and to the resource management unit; and a response sending unit that responds with an assessment result that indicates whether or not the route request is accepted to the request source of the route request.

Route request mediation apparatus, control apparatus, route request mediation method and program

A communication system includes: a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s); a first control apparatus setting the first packet handling operation(s) in the forwarding node(s); a flow control node(s) arranged upstream of the forwarding node(s); and a second control apparatus setting a second packet handling operation(s) in the flow control node(s). The flow control node(s) intercepts forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s) in accordance with the second packet handling operation(s).

Communication system, control apparatus, and communication method

Provided is a quality-deteriorated part analyzing system capable of analyzing a quality-deteriorated part in a network while increasing the degree of freedom of precision (coverage ratio, sectioning divisions, etc.) independently of the number and installation locations of devices transmitting and receiving flows. Path calculation meansdetermines paths, each passing through one or more directed links between nodes in the network and being regarded as a target of communication quality measurement, and generates a path table which indicates directed links included in each communication quality measurement target section. Quality measurement meansmeasures communication quality based on the flows corresponding to the paths determined by the path calculation means. Analysis meansanalyzes a communication quality-deteriorated part in the directed links in the network based on the path table and the communication quality.

Quality-deteriorated part analyzing system, quality-deteriorated part analyzing device, quality-deteriorated part analyzing method, and quality-deteriorated part analyzing program

Authentication apparatus authenticates user using host connected to forwarding node. Policy management apparatus holds access control policy for identifying host under access control using identifier of forwarding node or identifier of user, and links identifier of host under access control and identifier of forwarding node to which host is connected, or identifier of host under access control and identifier of user using host. Forwarding node transmits to policy management apparatus identifier of host connected to own forwarding node and identifier of own forwarding node. Authentication apparatus transmits to policy management apparatus identifier of host connected to forwarding node and identifier of user. Policy management apparatus refers to access control policy and, if host connected to forwarding node is under access control, notifies content of access control to control apparatus as access control list. Control apparatus generates processing rule in accordance with access control list and sets generated processing rule in forwarding nodes.

Growing community of inventors

Tokyo, Japan

Yoichi Hatano