Communication method, system thereof, resource pool management system, switches, and control device

The present invention provides a communication method of an SDN, a system thereof, a resource pool management system, switches, and a control device. The communication method comprises a step of obtaining the network attributes of virtual machines configured by the a resource pool management system according to the operation of a network resource pool by a user, a step of translating tenant network topology information obtained from the network attributes as a flow table when a first virtual machine and a second virtual machine communicate for the first time, and a step of issuing the flow table to the switches corresponding to the virtual machines such that the packet between the first virtual machine and the second virtual machines is discarded in the first time communication and subsequent communication when the switches judges that the first virtual machine and the second virtual machine can not communicate. According to the communication method, the broadcast of an ARP message to a whole network by a controller can be avoided, the packet_in packet sent to an SDN controller can be reduced, thus the network resources in the SDN can be fully utilized, and the resource pressure of the network and the controller can be eased.