A data storage device includes a non-volatile memory and host interface circuitry. The network element generates a set of one or two link state advertisements to advertise over an interface that connects at least one of the set of remote network elements to the network element, wherein the set of LSAs includes information that describes a connection to the set of remote network elements and one or more aggregate routes. The control process includes the steps of representing an operation of a fuel cell control system as a state machine having one or more states, controlling the operation of the fuel cell system using the state machine, executing one or more states of the state machine, and correcting operational errors in the fuel cell control system while the fuel cell system continues to operate. In use, the user sets up the leg arresting device by positioning the end member against an attachment point in front of the user.