A method for creating a virtual MAC address, the method includes receiving
an Internet Protocol address that is to be associated with a virtual MAC
address. The method creates a virtual MAC address by setting an OUI
portion of the virtual MAC address to an OUI value and setting the
non-OUI portion of the virtual MAC address to a subset of the Internet
Protocol (IP) address. In one embodiment, the lower three bytes of the IP
address are used. Additionally, a method of migrating a virtual MAC
address includes detecting a migration event on a first system; creating
a virtual MAC address on a second system; and issuing a gratuitous ARP
packet containing the virtual MAC address.