DATA CENTER NETWORK SYSTEM BASED ON SOFTWARE-DEFINED NETWORK AND PACKET FORWARDING METHOD, ADDRESS RESOLUTION METHOD, ROUTING CONTROLLER THEREOF

摘要

A data center network system based on software-defined network (SDN) is provided. The data center network system includes a plurality of physical machines, a plurality of Ethernet switches, a plurality of OpenFlow switches connected to each other, and a central control apparatus. Each of the physical machines includes a virtual switch and at least one virtual machine. The virtual switches modify destination media access control (MAC) addresses of packets to MAC addresses of the OpenFlow switches, such that the Ethernet switches forward the packets received from the virtual switches to the corresponding OpenFlow switches according to the MAC addresses of the OpenFlow switches. The OpenFlow switches modify the destination media access control (MAC) addresses of the packets to MAC addresses of virtual machines, such that the Ethernet switches forward the packet received from the OpenFlow switches to the corresponding virtual switches.

主权项

1. A data center network system based on a software-defined network, comprising:
a plurality of virtual switches, a plurality of virtual machines, and a plurality of physical machines, wherein each of the physical machines comprises one of the virtual switches and at least one of the virtual machines, and the one of the virtual switches corresponds to the at least one of the virtual machines which is in the same physical machine; a plurality of Ethernet switches, connected to the physical machines; a plurality of OpenFlow switches connected to each other, wherein a part or all the OpenFlow switches are connected to the Ethernet switches; and a central control device, connected to the OpenFlow switches, and setting up a plurality of flow entries in the virtual switches of the physical machines and the OpenFlow switches, to set up a routing path for forwarding a packet between the virtual machines, wherein one of the virtual switches modifies a destination media access control (MAC) address of the packet into a MAC address of one of the OpenFlow switches according to the flow entries, such that one of the Ethernet switches forwards the packet received from the one of the virtual switches to the corresponding OpenFlow switch according to the MAC address of the one of the OpenFlow switches, and wherein another one of the OpenFlow switches modifies the destination MAC address of the packet into a MAC address of one of the virtual machines according to the flow entries, such that another one of the Ethernet switches forwards the packet received from the another one of the OpenFlow switches to the corresponding virtual switch according to the MAC address of the one of the virtual machines.