Hi,
If your VNX is a unified file+block array, that is a celerra control station at the front end and a clariion at the back end, you'd just nedd ssh connectivity to the celerra control station, where we can run NaviCLI/NaviSecCLI commands against the backend array utilizing the DART OS NAS heads.
In case your VNX is block-only, that is just a clariion with thwo service processors, you'd have to use NaviCLI from the OCI server. I can tell from experience that installing NaviCLI is not a big deal. It's a matter of a couple of minutes.
I hope this helps.
Kind regards,
Gerhard