Nec Corporation

Koji Ashihara

Junichi Yamato

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.

Computer system and maintenance method of computer system

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.

A computer system of the present invention is provided with an open flow controller, and a switch. The switchnotifies a MAC address contained in packet data to the open flow controllerwhen 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 controllersets a communication flow for a migration destination VM generated according to the notified MAC address to the switch. The switchtransfers the packet data for said virtual machine which follows a ruleshown by the communication flow for said migration destination VM, to the migration destination virtual machine based on an actionshown by the communication flow for said migration destination VM.

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Tokyo, Japan

Koji Ashihara