After a reboot of a ESXi 6.0 server it will no longer mount several NFS shares being hosted on a Windows Server 2012 R2 box. Previously these shares were working fine, but now any NFS mount is met with the following error:
The NFS server does not support MOUNT version 3 over TCP
This is strange because the NFS server has both version 3 and 4 enabled
Likewise the protocols have both TCP and UDP enabled.
The firewall is also allowing NFS connections. I'm at a bit of a loss as to why the NFS shares have stopped being able to be mounted on ESXi. No major configuration changes have been made as far as I'm aware.
Two physical adapters. One configured for failover, but all traffic under one subnet 192.168.1.0/24 the same as the main LAN. No VLAN's or anything complicated.
2TB Storage Space Mirror hosted on a Windows Server 2012 R2 server. 3 NFS shares set to read/write for the ESXi host with "All Machines" as read-only.
I've tried restarting the NFS Server service on the Windows Server 2012 R2 box but the problem remains.