While there is NetApp support in PRTG, it is mainly focused on Data ONTAP style devices. We have a NetApp E-Series, and that is a Santricity device. Something completely different.
I noticed that Nagios has a plugin: https://exchange.nagios.org/components/com_mtree/attachment.php?link_id=6567&cf_id=30
It requires a NetApp SANtricity Web Services Proxy, but without PRTG support......
Anyone monitoring there NetApp E-Series Santricity devices with prtg?