IXGBE_MAX_JUMBO_FRAME_SIZE
netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE - (ETH_HLEN + ETH_FCS_LEN);
if (max_frame < ETH_MIN_MTU || max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE) {
netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -
netdev->max_mtu = IXGBE_MAX_JUMBO_FRAME_SIZE -