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How does an NFS client determine which NFS version to use when mounting?

Last Updated:

Applies to

Network File System(NFS)


  • When an NFS client mounts an NFS file system, it sends a request to the NFS server indicating which version(s) of the NFS protocol it supports
  • The server responds with the highest version number that both the client and server support
  • Related options that determine the NFS version during mount:
NFS client:
Mount option -o vers=
Configuration file /etc/nfsmount.conf
Storage system:
::> vserver nfs show
NFS v3: enabled/disabled
NFS v4.0: enabled/disabled
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