...
8. Click Next to go to the next page or Cancel to exit without saving. You can also click Back to edit the previous page.
9. In On the Summary page, check the fields for accuracy. If you need to change anything, click Back and make changes as needed.
10. Click Apply to apply the sFlow configuration or Cancel to exit without saving.
Ref. link: https://www.arubanetworks.com/techdocs/Aruba_Fabric_Composer/Content/afc60olh/sfl.htm configuration in Aruba