A node apparatus includes: a control unit setting up a path; a path setup time measuring unit measuring path setup time required to set up the path; a path setup time reporting unit reporting the path setup time to another node apparatus on a communication network; a path setup time storage unit storing the path setup time measured at another node apparatus on the communication network when the measured path setup time is reported from the other node apparatus; and an alternate path determining unit determining a path based on the path setup time of each node apparatus stored in the setup time storage unit.