Unable to mount NFS share getting error "mount.nfs4: an incorrect mount option was specified".

Issue

• Unable to mount NFS share getting error "mount.nfs4: an incorrect mount option was specified".

  # mount -t nfs server:/nfs /mnt -vvv                              
  mount.nfs: timeout set for Fri Apr 30 12:19:35 2021                                                               
  mount.nfs: trying text-based options 'logging=0,vers=4.2,addr=192.168.122.1,clientaddr=192.168.122.2'              
  mount.nfs: mount(2): Invalid argument                                                                             
  mount.nfs: trying text-based options 'logging=0,vers=4,minorversion=1,addr=192.168.122.1,clientaddr=192.168.122.2' 
  mount.nfs: mount(2): Invalid argument                                                                             
  mount.nfs: trying text-based options 'logging=0,vers=4,addr=192.168.122.2,clientaddr=192.168.122.2'                
  mount.nfs: mount(2): Invalid argument                                                                             
  mount.nfs: trying text-based options 'logging=0,addr=192.168.122.2'                                                
  mount.nfs: prog 100003, trying vers=3, prot=6                                                                     
  mount.nfs: portmap query retrying: RPC: Timed out                                                                 
  mount.nfs: prog 100003, trying vers=3, prot=17                                                                    
  mount.nfs: portmap query failed: RPC: Timed out                                                                   
  mount.nfs: an incorrect mount option was specified                                    
  

• Dmesg logs reports nfs: Unknown parameter:

  [Wed May 20 16:06:15 2026] nfs: Unknown parameter 'fatal_neterrors'
  [Wed May 20 16:06:18 2026] nfs: Unknown parameter 'fatal_neterrors'
  [Wed May 20 16:06:18 2026] nfs: Unknown parameter 'fatal_neterrors'
  [Wed May 20 16:06:18 2026] nfs: Unknown parameter 'fatal_neterrors'