VMware finally supports NFS version 4.1 and even allows Kerberos authentication. This now allows administrators to use features that were brought to the NFS kernel back in 2010. The biggest advantage in my mind is the ability to have “Multi-pathing” on your shares. You can now have multiple IP addresses associated with a single NFS mount for redundancy. In addition you can now provide more authentication for the mounts other then IP Addressing. You can now use Kerberos to authenticate the ESXi hosts. Now you must be using AD and that the ESXi host must joined to the domain, and that you’ve specified the NFS Authentication Credentials (which are in System -> Authentication Credentials on each host).
vSphere 6 now supports NFS v4.1 with Authentication