Systems and methods for a data center architecture facilitating layer 2 over layer 3 communication

A method for overlaying a virtual network with a multicast tree over a physical network, the method comprising:

• receiving an network address resolution packet at a virtual switch in communication with a virtual machine (VM) running on a first server, the network address resolution request including address information of the VM;
• collecting the address information from the network address resolution packet in a local network address resolution mediator, the local network address resolution mediator running on the first server;
• collecting the address information in a global network address resolution mediator running on a network device located a distance away from the first server in the physical network;
• and
• transmitting the address information from the global network address resolution mediator to a plurality of other local network address resolution mediators, each of the local network address resolution mediators running on a server other than the first server.

A non-transitory, computer-readable medium containing programmed instructions for overlaying a virtual network with a multicast tree over a physical network, wherein the execution of the programmed instructions by one or more processors causes the one or more processors to perform a method, the method comprising:

• receiving a network address resolution packet at a virtual switch in communication with a virtual machine (VM) running on a first server, the network address resolution packet including address information of the VM;
• collecting the address information from the network address resolution packet in a local network address resolution mediator, the local network address resolution mediator running on the first server;
• collecting the address information in a global network address resolution mediator running on a network device located a distance away from the first server in the physical network;
• and
• transmitting the address information from the global network address resolution mediator to a plurality of other local network address resolution mediators, each of the local network address resolution mediators running on a server other than the first server to create a multicast tree.