红帽全球峰会20.8. 使用 NTP 提供 PTP 时间
可以使用 LOCAL 参考时钟驱动程序将 ntpd 守护进程配置为从系统时钟同步（通过 ptp4l 或 phc2sys 同步的系统时钟）中分配时间。为防止 ntpd 调整系统时钟，ntp .conf 文件不得指定任何 NTP 服务器。以下是 ntp.conf 的一个最小示例：
~]# 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 0注意
当 DHCP 客户端程序, dhclient 收到来自 DHCP 服务器的 NTP 服务器列表时，它会将它们添加到 ntp.conf 并重新启动服务。要禁用此功能，请将 PEERNTP=no 添加到 /etc/sysconfig/network。
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