Linux NTP time synchronization Configuration

Configuration on node 1:
More/etc/NTP. conf
Restrict default ignore
Restrict 192.168.0.0 mask 255.255.255.0 notrap nomodify
Server 162.105.129.27 # time server on the Internet
Server 127.127.1.0 # local clock
Fudge 127.127.1.0 stratum 10
Driftfile/var/lib/NTP/drift
Broadcastdelay 0.008
Keys/etc/NTP/keys

Configuration on node 2:
More/etc/NTP. conf

Restrict default ignore
Restrict 127.0.0.1
Restrict 192.168.0.0 mask 255.255.255.0 nomodify
Server 192.168.0.125 # use node 1 as the upper-level Time Server
Restrict 192.168.0.125
Driftfile/var/lib/NTP/drift
Broadcastdelay 0.008
Keys/etc/NTP/keys

Run the following commands on two nodes:
Service ntpd start
Chkconfig -- level 35 ntpd on

Refer:
Http://publish.it168.com/2007/0417/20070417003602.shtml
Http://bbs.chinaunix.net/viewthread.php? Tid = 931263