IXGBE_PHYSICAL_LAYER_1000BASE_BX
if (layer & IXGBE_PHYSICAL_LAYER_1000BASE_BX) {
physical_layer = IXGBE_PHYSICAL_LAYER_1000BASE_BX;
IXGBE_PHYSICAL_LAYER_1000BASE_BX;
physical_layer = IXGBE_PHYSICAL_LAYER_1000BASE_BX;