@ Does licensing is required for WFA.
WFA2.0 onwards doesn't need any license.
@ Will it work with V-series
Well, as of WFA2.1, V-series support is not officially claimed. So this experimentation is entirely left to you. V-series isn't too much different from FAS. So who knows, It might just work.
Hi Sinhaa & Sundar,
I wanted to chime in quickly on this. Sinhaa's answer is correct. While there has been no testing on V-series, it will work... and we need to work on the officially supported statements internally. All of the same core ONTAP goodness (7-mode or clustered Data ONTAP) work the same, so that means our 7-mode and clustered ONTAP workflows and commands will work on the Vseries systems just fine.
Sundar, please let us know how your testing goes.
There is really only one major difference between a FAS system and a V-Series system, and that is that the V-Series systems can support non-NetApp storage (based on what's qualified in the Interoperability Matrix). This might make certain things you do on the back-end (with the disks) slightly different, but from any other actions you would want to perform, it would be exactly the same as a FAS system. Meaning all workflows currently existing in WFA will work both on FAS and V-series.
Hope this helps,