Hello everyone,NFS with Ontap 9.1 works - my issues are resolved.
Cause: Despite all checklists being ticked off, on our FAS2650 no "public" LIFs for the NFS-SVM were created.
Only the "private"/non-routed/L2 internal Datastore-VLAN between Netapp and ESXi was created
-> While testing everything worked when i manually mapped the Datastores to the ESXi Hosts
-> But Veeam, coming from a "normal" routed L3 VLAN was not able to access, as the corresponding Netapp LIFs on this subnet were missing
So, it was a User error
But @Veeam: Please fix this behaviour, it is extremely misleading!
The Netapp SVM is NFS only, and in Veeam the Netapp is configured for NFS-access only. Yet, the error messages all point towards ISCSI/FC (Initiators, SAN, etc. all over the logs.)
In this case, Veeam should just scream "hey, i can not access this storage over NFS, fix it!" instead.
TLDR: No way for Veeam to access NFS Datastore, Veeam throws logs pointing towards ISCSI/FC, leading me to believe it's a Veeam-bug because 9.1 is not officially supported yet