1、在CS1上配置NTP主时钟并启动NTP认证功能，使能CS1的NTP服务器功能。
<CS1> system-view
[~CS1] ntp refclock-master 1
[*CS1] ntp authentication enable
[*CS1] ntp authentication-keyid 42 authentication-mode hmac-sha256 Hello@123456
[*CS1] ntp trusted authentication-keyid 42
[*CS1] undo ntp server disable
[*CS1] commit
2、在DS1上指定CS1为NTP服务器。（其他的配置类似）
<DS1> system-view
[~DS1] ntp authentication enable
[*DS1] ntp authentication-keyid 42 authentication-mode hmac-sha256 Hello@123456
[*DS1] ntp trusted authentication-keyid 42
[*DS1] ntp unicast-server 10.100.1.1 authentication-keyid 42
[*DS1] commit
