A method and system for starting up a network or network device with particular discussion regarding Fibre Channel networks and switches. The method and system relate to powering on or re-starting a plurality of Fibre Channel switching devices, each of those devices having ports. The system generally calls for the selection of a priority threshold that relates to the importance of tasks in fabric formation. Some embodiments of the system exploit a port authentication procedure to separate the execution of tasks higher in priority than the threshold from tasks lower in priority than the threshold.