Patent ID: 8718061

Claim:
A data center network system, comprising: a first physical machine; a first virtual machine, run on the first physical machine; a second physical machine; a second virtual machine, run on the second physical machine, wherein the first virtual machine is configured for sending a data packet to the second virtual machine, and the data packet has a destination address field and a source address field; a network switch, configured for forwarding the data packet; and a management server, wherein the first physical machine, the second physical machine, the network switch and the management server communicate with each other according to an Ethernet protocol, wherein the management server configures a corresponding logical media access control address for each of the first physical machine, the first virtual machine, the network switch, the second physical machine and the second virtual machine, wherein each of the logical media access control addresses comprises most significant bytes and least significant bytes, and the most significant bytes are set as 0, wherein the management server provides the logical media access control address of the network switch to the first physical machine, wherein the first physical machine has an encapsulation module, and the encapsulation module is configured for encapsulating the data packet from the first virtual machine, wherein the logical media access control address of the network switch is put in the destination address field of the encapsulated data packet, and the least significant bytes of the logical media access control address of the first virtual machine and the least significant bytes of the logical media access control address of the second virtual machine are put in the source address field of the encapsulated data packet, wherein a length of the least significant bytes is half of a length of the source address field, the least significant bytes of the logical media access control address of the first virtual machine and the least significant bytes of the logical media access control address of the second virtual machine are put in a single source address field, and the logical media access control address of the network switch is put in a single destination address field, wherein the length of the encapsulated data packet is not extended and no new header is added into the encapsulated data packet, wherein the first physical machine sends the encapsulated data packet, wherein the least significant bytes of the logical media access control address of the second virtual machine in the source address field are restored as a complete destination address and put in the destination address field of a decapsulated data packet, and the least significant bytes of the logical media access control address of the first virtual machine are restored as a complete source address and put in the source address field of the decapsulated data packet.