Abstract: A communication system includes a control device configured to calculate a packet forwarding path and set a flow based on the packet forwarding path in a node, and a plurality of nodes configured to forward a received packet based on a flow set by the control device. The control device, when receiving a detour instruction, calculates a new packet forwarding path which detours a detour target node and sets a flow based on the new packet forwarding path in the plurality of nodes on the new packet forwarding path.

Abstract: A communication system includes a control device configured to calculate a packet forwarding path and set a flow based on the packet forwarding path in a node, and a plurality of nodes configured to forward a received packet based on a flow set by the control device. The control device, when receiving a detour instruction, calculates a new packet forwarding path which detours a detour target node and sets a flow based on the new packet forwarding path in the plurality of nodes on the new packet forwarding path.

Abstract: A communication system includes a control device configured to calculate a packet forwarding path and set a flow based on the packet forwarding path in a node, and a plurality of nodes configured to forward a received packet based on a flow set by the control device. The control device, when receiving a detour instruction, calculates a new packet forwarding path which detours a detour target node and sets a flow based on the new packet forwarding path in the plurality of nodes on the new packet forwarding path.

Abstract: A computer system of the present invention is provided with a switch for transferring a received packet data to a destination according to a flow set to itself, an integrated management apparatus which specifies a maintenance object unit and a controller. The controller separates the maintenance object unit from the computer system by controlling the setting or deletion of the flow to the switch. Thus, the maintenance processing of the computer system can be performed without stopping the function by controlling the side of the network and the side of the computer integratedly.

Abstract: A computer system of the present invention is provided with an open flow controller 3, and a switch 4i. The switch 4i notifies a MAC address contained in packet data to the open flow controller 3 when the packet data from the virtual machine that the migration has completed does not fit with a rule shown by the flow set to the switch itself. The open flow controller 3 sets a communication flow for a migration destination VM generated according to the notified MAC address to the switch 4i. The switch 4i transfers the packet data for said virtual machine which follows a rule 444 shown by the communication flow for said migration destination VM, to the migration destination virtual machine based on an action 445 shown by the communication flow for said migration destination VM.

Abstract: A communication system includes a control device configured to calculate a packet forwarding path and set a flow based on the packet forwarding path in a node, and a plurality of nodes configured to forward a received packet based on a flow set by the control device. The control device, when receiving a detour instruction, calculates a new packet forwarding path which detours a detour target node and sets a flow based on the new packet forwarding path in the plurality of nodes on the new packet forwarding path.

Abstract: In a central control-type network system, a flexible network control is carried out to improve operability and performance of the network. Specifically, in a network system which carries out a central control to a communication route, an optimal route is selected in consideration of a load situation of network equipments, a load situation of server equipments, and a load situation of applications. A control unit, which carries out the central control to all the equipments of a system such as a network and a server, calculates an optimal route and sets a communication route to the network equipments. Also, the optimal route is determined in consideration of a congestion situation of the network equipments and the load situation of the server equipments and the applications. Moreover, the optimal route is determined in consideration of a phenomenon which could occur in the future from a past congestion situation and a past load situation in addition to a current situation.

Abstract: A computer system of the present invention is provided with a switch for transferring a received packet data to a destination according to a flow set to itself, an integrated management apparatus which specifies a maintenance object unit and a controller. The controller separates the maintenance object unit from the computer system by controlling the setting or deletion of the flow to the switch. Thus, the maintenance processing of the computer system can be performed without stopping the function by controlling the side of the network and the side of the computer integratedly.

Abstract: A computer system of the present invention is provided with an open flow controller 3, and a switch 4i. The switch 4i notifies a MAC address contained in packet data to the open flow controller 3 when the packet data from the virtual machine that the migration has completed does not fit with a rule shown by the flow set to the switch itself. The open flow controller 3 sets a communication flow for a migration destination VM generated according to the notified MAC address to the switch 4i. The switch 4i transfers the packet data for said virtual machine which follows a rule 444 shown by the communication flow for said migration destination VM, to the migration destination virtual machine based on an action 445 shown by the communication flow for said migration destination VM.