What do the offload parameters shown by ethtool -k mean?

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  • What do the offload parameters shown by ethtool -k ethX mean?
# ethtool -k ethX

Offload parameters for ethX:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp-segmentation-offload: on
udp-fragmentation-offload: on
generic-segmentation-offload: on
generic-receive-offload: off
large-receive-offload: off
  • The above features may differ according to each NIC capabilities. Refer to Resolution section for full list of the features.


  • Red Hat Enterprise Linux
  • Network interfaces
  • ethtool

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