def linkUpDown(self, port, action='down'):
        """
        Description
            Flap a port up or down.

        Parameters
            port: <list>: A list of ports in a list.  [[ixChassisIp, str(card), str(port)]] -> ['10.10.10.1', '1', '3']
            action: <str>: up|down
        """
        vport = self.ixnObj.getVports([port])[0]
        self.ixnObj.post(self.ixnObj.sessionUrl+'/vport/operations/linkUpDn', data={'arg1': [vport], 'arg2': action})