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23.7. Serving PTP Time With NTP
The
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
Note
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
.