Hi, Our 2-socket ThunderX server (GIGABYTE model R150-T62) fails to link up one of the 4 fibre ports, part of the SoC at boot time for some reason. Bringing up the port manually fails too: # ifup enP2p1s0f1 # ifdown enP2p1s0f1 [30836.757508] IPv6: ADDRCONF(NETDEV_UP): enP2p1s0f1: link is not ready Device 'enP2p1s0f1' successfully disconnected. # ifup enP2p1s0f1 Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/5) The above is misleading as the port is not activated unless we re-plug the fibre cable. Has anyone hit this issue or should we suspect the HW issue? Itaru PS We've tested all the other three physical ports; none worked.