Force RHEL 6 to use NFSv3 instead of NFSv4

Here is how to force Redhat Enterprise Linux 6 to use nfs v3 instead of version 4.

1. Edit /etc/sysconfig/autofs and comment out:

MOUNT_NFS_DEFAULT_PROTOCOL=4

uncomment:

MOUNT_NFS_DEFAULT_PROTOCOL=3

2. Edit /etc/nfsmount.conf and add the following lines:

Defaultvers=3
Nfsvers=3

3. Restart autofs

sudo service autofs restart

4. Then re-mount and your done.