The Open Telecommunications Platform supports only NFS version 3. To ensure system integrity and availability, update the /etc/default/nfs file as follows:
log in as root (su - root) to the server.
Add the following line to the file /etc/default/nfs:
NFS_SERVER_VERSMAX=3
Save and close the /etc/default/nfs file.
Update the /etc/hosts file as described in the next procedure.