Patent ID: 8363666
Filing Date: 2013-01-29
Classification: H04L

Abstract:
1. A virtual local area network (VLAN), comprising: a first network including a first gateway router assigned a first Internet Protocol (IP) address and first Medium Access Control (MAC) address for use including forwarding packets received from one or more external networks into the first network; and a second network, communicatively coupled with the first network for exchanging Layer 2 traffic, and including a second gateway router assigned a second IP address and second MAC address for use including forwarding packets received from said one or more external networks into the second network; wherein each of the first and second gateway routers are further assigned a same third IP address and a same third MAC address for use in selectively communicating with devices on their respective first or second network, such that a virtual or physical device migrated from the first network to the second network can use the third IP address as its default IP gateway address and reach the default gateway using packets addressed with a MAC destination address of the third MAC address when it is on the first network and when it is on the second network; wherein the VLAN is configured such that Layer 2 traffic devices in the first network will MAC learn ports for the third MAC that are towards the first gateway router and not towards the second gateway router, and configured such that Layer 2 traffic devices in the second network will MAC learn ports for the third MAC that are towards the second gateway router and not towards the first gateway router.