I discovered a way to cause this instantly, I attempted to change the size of the ring buffers from 512 bytes to the hardware maximum of 4096 using: ethtool -G eno1 rx 4096 tx 4096, it instantly hung the interface with the following in dmesg: [458611.154752] e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang: TDH <48> TDT <73> next_to_use <73> next_to_clean <47> buffer_info[next_to_clean]: time_stamp <11b5117a3> next_to_watch <48> jiffies <11b511d40> next_to_watch.status <0> MAC Status <80083> PHY Status <796d> PHY 1000BASE-T Status <7c00> PHY Extended Status <3000> PCI Status <10> [458613.138731] e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang: TDH <48> TDT <73> next_to_use <73> next_to_clean <47> buffer_info[next_to_clean]: time_stamp <11b5117a3> next_to_watch <48> jiffies <11b512500> next_to_watch.status <0> MAC Status <80083> PHY Status <796d> PHY 1000BASE-T Status <7c00> PHY Extended Status <3000> PCI Status <10> [458615.122888] e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang: TDH <48> TDT <73> next_to_use <73> next_to_clean <47> buffer_info[next_to_clean]: time_stamp <11b5117a3> next_to_watch <48> jiffies <11b512cc0> next_to_watch.status <0> MAC Status <80083> PHY Status <796d> PHY 1000BASE-T Status <7c00> PHY Extended Status <3000> PCI Status <10> [458617.106832] e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang: TDH <48> TDT <73> next_to_use <73> next_to_clean <47> buffer_info[next_to_clean]: time_stamp <11b5117a3> next_to_watch <48> jiffies <11b513480> next_to_watch.status <0> MAC Status <80083> PHY Status <796d> PHY 1000BASE-T Status <7c00> PHY Extended Status <3000> PCI Status <10>[458619.154912] e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang: TDH <48> TDT <73> next_to_use <73> next_to_clean <47> buffer_info[next_to_clean]: time_stamp <11b5117a3> next_to_watch <48> jiffies <11b513c80> next_to_watch.status <0> MAC Status <80083> PHY Status <796d> PHY 1000BASE-T Status <7c00> PHY Extended Status <3000> PCI Status <10> [458620.562618] e1000e 0000:00:19.0 eno1: Reset adapter unexpectedly [458620.562761] bridge0: port 1(eno1) entered disabled state [458620.562789] bridge0: topology change detected, propagating [458623.880650] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [458623.880683] bridge0: port 1(eno1) entered blocking state [458623.880688] bridge0: port 1(eno1) entered listening state [458638.995031] bridge0: port 1(eno1) entered learning state [458654.355381] bridge0: port 1(eno1) entered forwarding state [458654.355385] bridge0: topology change detected, sending tcn bpdu [476901.384610] bridge0: port 1(eno1) entered disabled state [476901.384656] bridge0: topology change detected, propagating [476905.544755] e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [476905.544788] bridge0: port 1(eno1) entered blocking state [476905.544791] bridge0: port 1(eno1) entered listening state [476920.887125] bridge0: port 1(eno1) entered learning state [476936.247478] bridge0: port 1(eno1) entered forwarding state [476936.247482] bridge0: topology change detected, sending tcn bpdu