On Tue, 13 Oct 2020 22:40:09 +0200 Jesper Dangaard Brouer wrote: > > FWIW I took a quick swing at testing it with the HW I have and it did > > exactly what hardware should do. The TX unit entered an error state > > and then the driver detected that and reset it a few seconds later. > > The drivers (i40e, mlx5, ixgbe) I tested with didn't entered an error > state, when getting packets exceeding the MTU. I didn't go much above > 4K, so maybe I didn't trigger those cases. You probably need to go above 16k to get out of the acceptable jumbo frame size. I tested ixgbe by converting TSO frames to large TCP frames, at low probability.
