self.set_bd_flags(self.bd_list[0], learn=False, forward=False,
flood=False, uu_flood=False)
self.set_bd_flags(self.bd_list[1], forward=False)
self.set_bd_flags(self.bd_list[0], learn=False, forward=False,
flood=False, uu_flood=False)
self.set_bd_flags(self.bd_list[1], forward=False)