Error while mounting NFS file system on Exadata -- reason given by server: Permission denied

One of our colleague faced below issue while mounting NFS file system on Exadata.

[root@nfsclient /]# mount -t nfs 192.168.100.11:/nfs_server /nfs_client
mount: 192.168.100.11:/nfs_server failed, reason given by server: Permission denied

Solution:

NFS_Server IP - 192.168.100.11
NFS_Client IP - 192.168.100.10

Go to NFS Server. In our case NFS server is 192.168.100.11

ssh 192.168.100.11

Check the /etc/exports file

#cat /etc/exports

/nfs_server 192.168.100.*(*)

Edit /etc/exports file

#vi /etc/exports

/nfs_server 192.168.100.10 (rw,sync)

Restart the NFS services.

#service nfs restart

Now check on NFS Client server which is 192.168.100.10

ssh 192.168.100.10

#Service nfs restart
#Service portmap restart

#showmount -e nfsclient ----Here nfsclient is the server name

output:/nfs_server 192.168.100.10      

Now mount the nfs filesystem

[root@nfsclient /]# mount -t nfs 192.168.100.11:/nfs_server /nfs_client

Now it has been mounted successfully.