US Patent 7451208 Systems and methods for network address failover

Systems and methods provide network address failover capability within an application gateway device. In one aspect, a system has a first network interface and a second network interface. The system receives a set of configuration data, the configuration data may include a first network address for the first network interface and a second network address for the second network interface. At startup or during later operation, the system may detect the failure of the first network interface. The configuration data may be analyzed to determine if the first network address can be used on the second network interface. If so, the first network address is moved from the first network interface to the second network interface.