Public bug reported: Hi,
Using Ubuntu 18.04, kernel 4.15.0-47, with a Mellanox MCX556M-ECAT-S25 [1]. With the distro driver, it's impossible to increase the MTU of a representor port : $ sudo ip li set enp50s0f0_0 mtu 1501 RTNETLINK answers: Invalid argument Whereas with the OFED driver [2], I can set it up to 9978 : $ sudo ip li set mtu 9978 enp50s0f0_0 $ This is blocking to use OVS offloading with jumbo frames. Could we please get the feature in the distro driver ? Thanks ! Steps to create the representor : echo 1 | sudo tee /sys/class/net/enp50s0f0/device/sriov_numvfs echo 0000:32:00.3 | sudo tee /sys/bus/pci/drivers/mlx5_core/unbind sudo devlink dev eswitch set pci/0000:32:00.0 mode switchdev echo 0000:32:00.2 | sudo tee /sys/bus/pci/drivers/mlx5_core/bind [1] http://www.mellanox.com/related-docs/prod_adapter_cards/PB_ConnectX- 5_VPI_Card_SocketDirect.pdf [2] http://www.mellanox.com/page/mlnx_ofed_eula?mtag=linux_sw_drivers&mrequest=downloads&mtype=ofed&mver=MLNX_OFED-4.5-1.0.1.0&mname=MLNX_OFED_LINUX-4.5-1.0.1.0-ubuntu18.04-x86_64.tgz ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1824367 Title: mlx5 : not able to set a high MTU on the representor port for a VF To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1824367/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
