Rocky 9 Linux NFS with UDP

Rocky Linux Tech Help
1

Testing NFS service. On nfs-server in /etc/nfs.conf included
udp=y
vers3=y

On client side /etc/nfsmount.conf with
Defaultvers=3
NFsvers=3
I’m able to nfs mount.

When I include:
Defaultproto=udp
Proto=udp
I’m not able to nfs mount.
Get error message:
mount.nfs: an incorrect mount option was specified.

2

Found my answer. As of kernel 5.5 UDP is by default disabled. Went with Rocky 8 where UDP is still supported so I don’t have to rebuild kernel to disable CONFIG_NFS_DISABLE_UDP_SUPPORT.