The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

2.2.10 Default NFS Mount Options

By default, mount assumes NFS v4. To mount an NFS v3 volume (the default in Oracle Linux 5), use the following mount options:

-o vers=3,mountproto=tcp