Make sure ntp is installed.
yum install ntp
Edit /etc/ntp.conf/ and add the following lines where needed:
server hickory.byu.edu server dickory.byu.edu server dock.byu.edu
Execute the following:
/sbin/chkconfig –level 2345 ntpd on
Next do to make sure both are using the BYU servers.
service ntpd status