FreeBSD NIC Settings

ifconfig -m <interface>

-m display the capability list and all of the supported media for the specified interface. Check the capabilities= line for offload settings.

Capabilities can be modified with ifconfig as well:

ifconfig <interface> tso4 # Enable tcp(4) segmentation offloading for ip(4) only
ifconfig <interface> -tso4 # Disable tcp(4) segmentation offloading for ip(4) only

References

• IFCONFIG(8)