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23.7. Serving PTP Time With NTP
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ntpd daemon can be configured to distribute the time from the system clock synchronized by ptp4l or phc2sys by using the LOCAL reference clock driver. To prevent ntpd from adjusting the system clock, the ntp.conf file must not specify any NTP servers. The following is a minimal example of ntp.conf:
cat /etc/ntp.conf server 127.127.1.0 fudge 127.127.1.0 stratum 0
~]# cat /etc/ntp.conf
server 127.127.1.0
fudge 127.127.1.0 stratum 0Note
When the
DHCP client program, dhclient, receives a list of NTP servers from the DHCP server, it adds them to ntp.conf and restarts the service. To disable that feature, add PEERNTP=no to /etc/sysconfig/network.
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