US Patent 8966075 Accessing a policy server from multiple layer two networks

A network device, such as a policy server, supports a plurality of different layer two (L2) networks. The network device receives a request to initiate a communication session from an endpoint device, selects an L2 network to which to assign the endpoint device, and assigns the endpoint device to the selected L2 network, selects one of a plurality of L3 network addresses for the policy server based on the selected L2 network, and sends the L3 network address to the endpoint device. The network device also includes a monitoring module that monitors activities of the endpoint device, and a plurality of L2 network interfaces, wherein each L2 network interface is associated with at least one L2 network. The L2 networks may be virtual local area networks.