You may refer to this website
Please refer to Intel Ethernet Flow Director:->Other ethtool Commands:
To enable Flow Director ethtool -K ethX ntuple on
To add a filter Use -U switch. e.g., ethtool -U ethX flow-type tcp4 src-ip 10.0.128.23 action 1
To see the list of filters currently present: ethtool -u ethX
Hope this helps.