现场1台H3C 5110交换机
版本：Comware Software, Version 5.20.99, Release 1105
当前没有指定NTP，
<H3C-5110>dis ntp-service status
Clock status: unsynchronized
Clock stratum: 16
Reference clock ID: none
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: 0.0000 ms
Root delay: 0.00 ms
Root dispersion: 0.00 ms
Peer dispersion: 0.00 ms
Reference time: 00:00:00.000 UTC Jan 1 1900(00000000.00000000)
以下是配置步骤
ntp server： 10.248.1.200
1 进入配置模式
<H3C-5110>sys
System View: return to User View with Ctrl+Z.
2 指定ntp server
[H3C-5110]ntp unicast-server 10.248.1.200
3 配置完成，查看ntp状态
已经同步成功
[H3C-5110]dis ntp-service status
Clock status: synchronized
Clock stratum: 4
Reference clock ID: 10.248.1.200
Nominal frequency: 100.0000 Hz
Actual frequency: 100.0000 Hz
Clock precision: 2^18
Clock offset: 0.0000 ms
Root delay: 427.93 ms
Root dispersion: 0.11 ms
Peer dispersion: 89.86 ms
Reference time: 03:29:50.598 UTC May 15 2025(EBCFDE2E.99334C5D)
查看当前时间，不对，差了8小时，是因为时区没改，
要改为东8区
[H3C-5110]dis clock
03:29:56 UTC Thu 05/15/2025
[H3C-5110]clock timezone UTC add 8:00:00
修改后再次查看日期时间正常
[H3C-5110]dis clock
11:30:18 UTC Thu 05/15/2025
Time Zone : UTC add 08:00:00
如果没有NTP SERVER, 想要手工的指定日期时间，使用下面命令
注意：是在>模式，而不是配置模式
clock datetime 21:27:00 2025/5/1
如果报错，说明需要先指定clock protocl为none
示例：
<H3C-5110>clock datetime 21:27:00 2025/5/1
To manually set the system time, execute the clock protocol none command first.
[H3C-5110]clock protocol none
<H3C-5110>clock datetime 21:27:00 2025/5/1
确认修改已经生效
[H3C-5110]dis clock
21:27:19.038 UTC Thu 05/01/2025
