MAC address VPN

Edge nodes have a list of supernodes to which they register at startup. Supernodes temporarily store information about the edge nodes; such information needs to be periodically refreshed by the edge node. Edge nodes register to the first available supernode; registration to additional supernodes happens if the supernode to which the edge node is registered becomes unresponsive.As N2N is a layer two VPN, edge nodes are identified uniquely by a 6 byte MAC address and a 16 byte community name. Edge nodes use TAP [17] devices that act as virtual ethernet devices implemented in the operating system kernel. In TAP devices, the ethernet driver is implemented in a user-space application. N2N provides such a driver implementation, which encapsulates encrypted ethernet frames within UDP packets as in Figure 2.