User`s guide

Chapter XII. Offload IPv6 driver
Chelsio T5/T4 Unified Wire For Linux Page 184
3. Software/Driver Unloading
To disable Offload IPv6 feature, unload NIC and TOE drivers:
3.1. Unloading the NIC driver
To unload the NIC driver, run the following command:
[root@host]# rmmod cxgb4
3.2. Unloading the TOE driver
Please reboot the system to unload the TOE driver.