H3C S5100交换机登陆后有夏令时提示如下：
Summer-Time : Bern repeating 02:00:00 03/25/2007 03:00:00 10/28/2007 01:00:00
配置方法如下：
clock summer-time name start-time start-date end-time end-date add-time
关闭夏令时的方法如下：
undo clock summer-time
系统消息如下：
#Jul 8 10:22:44:867 2020 Switch1 SYSMIB/5/TRAP:- 1 –
1.3.6.1.4.1.2011.10.2.3.2.1(h3cSysClockChangedNotification) System clock changed
