Performance with Intel i218/i219 NIC

Last change on 2021-05-12 • Created on 2020-06-04 • ID: RO-4109E

Low performance with Intel i218/i219 NIC


With kernel version 4.15, a fix in the e1000e driver has been introduced:

This fix slightly slows down DMA access times to prevent the NIC from hanging up on heavy UDP traffic. This impacts the TCP performance.


In order to regain full transfer speeds, you can turn off TCP segmentation offloading via the following command:

ethtool -K <interface> tso off gso off

There is currently no fix available / announced that allows offloading TCP segmentation to the NIC without sacrificing performance.

You can ignore the following error message:

Cannot get device udp-fragmentation-offload settings: Operation not supported

Older ethtool versions try to disable a feature not present in newer kernel versions. Nevertheless, deactivating the TCP segmentation offloading will still work:

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