It looks like you just enable it?
It's automatically enabled then for each VSAN on the switch which makes sense.
Are there any other considerations?
Is it at all disruptive?
You must globally enable NPIV for all VSANs on the MDS switch to allow the NPIV-enabled applications to use multiple N port identifiers.
Note All of the N port identifiers are allocated in the same VSAN
Enable NPIV mode on the NPV core switch:
switch(config)# npiv enable
enabling NPIV on the core switch is non-disruptive. DO NOT CONFUSE THIS WITH ENABLING NPV MODE on a switch.