Abstract: A control device reduces its load responding to a transmission request for control information, and includes a control information management unit managing control information including a match field and causes a packet matching the match field to be processed; a transmission request storage unit storing uncontrolled transmission requests in transmission requests for control information for packets received by a switch under the control from the switch; and a request processing unit selecting a piece of control information having a looser match field from among pieces of control information managed by the control information management unit, then selects an unprocessed transmission requests for control information matching the selected piece of control information having a looser match field in unprocessed transmission requests for control information stored in the transmission request storage unit, and replies control information with the looser match field to the switch transmitting the unprocessed transmis

Abstract: The present invention reduces load on a control device responding to a request to send control information that is issued from a switch. A control device includes: a control information management unit that manages control information including a match field and used for causing a packet which matches the match field to be processed; and a request processing unit that, when receiving, from a switch under control, a transmission request for control information for processing a packet which the switch receives, compares a match field of control information managed by the control information management unit with a field, which is to be compared with the match field, of a packet received by the switch, selects, from pieces of control information having match fields which match the field of the packet, a piece of control information having a looser match field, and replies to the switch with the selected piece of control information.

Abstract: To control transmission of a control information transmission request from a switch to a control device. The switch includes: a packet processing unit that processes a received packet by using control information received from a preset control device control device; a communication unit that transmits and receives the control information to and from the control device; and a control unit that controls order of control information to be transmitted and received by the communication unit.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A communication terminal comprises: first unit 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 unit 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 unit that requests the control apparatus to inform the forwarding apparatus of a processing rule corresponding to the determined packet processing operation.

Abstract: 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).

Abstract: A terminal communicating with a network including a forwarding device(s) for forwarding a packet and a control device for controlling the forwarding device(s) in accordance with a request from the forwarding device, includes: a communication unit that receives a processing rule indicating that a packet for communicating with a first destination is changed so as to communicate with a second destination, from the control device; a storage unit that stores the received processing rule, and a processing unit that in a case of communicating with the network, changes a destination of a packet in accordance with a processing rule that corresponds to the packet by referring to the processing rule stored in the storage unit.

Abstract: A communication control apparatus controls communication between a first apparatus and a second apparatus connected to the first apparatus via a plurality of relay apparatuses. The communication control apparatus comprises: a communication path generation unit that refers to a control policy including access control and supplementary control that is other than the access control from the first apparatus to the second apparatus and refers to network configuration information about a network configuration among the first apparatus, the second apparatus, and the plurality of relay apparatuses and generates a communication path that matches the control policy from the first apparatus to the second apparatus and goes through at least one of the plurality of relay apparatuses; and a communication path control unit that instructs a relay apparatus(es) on the communication path among the plurality of relay apparatuses to execute the access control and the supplementary control included in the control policy.

Abstract: A communication system includes: a plurality of forwarding nodes that process a packet transmitted from a user terminal, in accordance with a processing rule that has been set, and a control device that selects a forwarding node in which a processing rule is to be set, from among the plurality of forwarding nodes, such that processing rules are set so as not to be concentrated in a specific forwarding node, based on the number of processing rules that are set in each of the forwarding nodes.

Abstract: 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.

Abstract: A terminal communicating with a network including a forwarding device for forwarding a packet and a control device for controlling the forwarding device in accordance with a request from the forwarding device, includes: a communication unit that receives a processing rule specifying a method of processing the packet, which is determined by the control device, from the control device, a storage unit that stores the received processing rule, and a processing unit that in a case of communicating with the network, processes the packet in accordance with the processing rule that corresponds to the packet by referring to the processing rule stored in the storage unit.

Abstract: A communication system includes an information acquisition unit that acquires information for determining an isolation level to which a user terminal belongs, from the user terminal; an isolation level determination unit that determines an isolation level to which the user terminal belongs, based on the acquired information; an isolation level information storage unit that defines whether or not access is possible to respective access destinations for each isolation level; an access control unit that causes a forwarding node(s) to implement forwarding or dropping of a packet, in accordance with whether or not access is possible to the respective access destinations; and a forwarding node(s) that forwards a packet in accordance with control of the access control unit. Stepwise access control is realized using isolation levels.

Abstract: A communication system comprises: a plurality of forwarding nodes each of which processes an incoming packet in accordance with a packet handling operation; a data base which stores a first table for determining a role of a user of a source node from information about the source node and a second table for defining an accessible or inaccessible resource for each role and which transmits a response about a resource accessible or inaccessible by the user of the source node in response to a request from a control apparatus; and a control apparatus which uses, when receiving a request for setting the processing rule from any one of the forwarding nodes, information about the source node included in the request for setting the processing rule, querying the data base for a resource accessible or inaccessible by the user of the source node, creating the processing rule based on the response from the data base, and setting the processing rule in the forwarding node.

Abstract: A communication system includes a control device; a forwarding node that processes, in accordance with a processing rule set by control device, a packet transmitted from a user terminal; and a policy management device that manages communication policy and notifies the control device of communication policy that corresponds to a user for whom authentication has succeeded; a setting request transmission permitting unit that, based on notification from the policy management device, sets to a forwarding node that receives a packet from the user terminal a first processing rule causing the forwarding node to make a setting request of processing rule with regard to a packet transmitted from the user terminal; and a path control unit that determines path from user terminal to access destination and sets to forwarding node along the path the second processing rule that corresponds to the path.

Abstract: A communication system comprises: a plurality of forwarding nodes processing an incoming packet in accordance with a processing rule (packet handling operation) in which a matching rule for determining a packet to be processed and a processing content applied to a packet matching the matching rule are associated with each other; an address management apparatus giving an address to a host; and a control apparatus first setting a first processing rule for realizing communication between the host and the address management apparatus in a forwarding node between the host and the address management apparatus and thereafter setting a second processing rule for realizing communication between a host given an address by the address management apparatus and a predetermined network resource.

Abstract: The present invention implements detailed access control according to access rights granted to users, by a simple configuration.