mount.nfs: requested NFS version or transport protocol is not supported

NFS Mount is not working in my RHEL 7 AWS instance.

When I do a

mount -o nfsvers=3 10.10.11.10:/ndvp2 /root/mountme2/ 

I get the error:

mount.nfs: requested NFS version or transport protocol is not supported 

Can anyone point me where I am wrong? Thanks.

6 Answers

Check the nfs service is started or reboot the nfs service.

sudo systemctl status nfs-kernel-server In my case this package was not running and the issue was in /etc/exports file where i was having same IP address for two machines. So i commented one ip address for the machine and restarted nf-kernel-server using sudo systemctl restart nfs-kernel-server and reload the machine. It worked.

A precision which might be useful for the dump (like me): systemctl status nfs-server.service and systemctl start nfs-server.service must be executed on the server!

Some additional data

If, like me, you've deleted a VM without shutting it down right you might also need to manually edit the file /etc/exports because NFS is trying to connect to it and fails but doesn't continue with the next, it just dies.

After that you can manually restart as mentioned in other answers.

In my case, a simple reload didn't suffice. I had to perform a full restart:

sudo systemctl status nfs-kernel-server 

I got the solution: make an entry in nfs server /etc/nfsmount.conf with Defaultvers=3 .

There will # Defaultvers=3 just unhash it and then mount on nfs client.

Issue will be resolved!