配置cisco交换机通过NTP同步时间

1.配置时区

switch(config)#clock timezome HK +8  //经测试其实这个GMT可以换为任意字符，但要在7个字符以内，用于标记时区

2.配置NTP服务器

switch(config)#ntp server 202.112.7.13 //我这里是用的互联网NTP服务器，也可以架设本地NTP服务器

3.检查配置

switch#show ntp associations //查看NTP服务状态

address         ref clock     st  when  poll reach  delay  offset    disp
*~202.112.7.13     202.112.10.60     2   374   512  377    47.0    2.85    31.7
* master (synced), # master (unsynced), + selected, – candidate, ~ configured

switch#show ntp status //查看ntp同步状态

Clock is synchronized, stratum 3, reference is 202.112.7.13
nominal freq is 190.7348 Hz, actual freq is 190.7245 Hz, precision is 2**18
reference time is DAD5197F.E8588584 (08:59:43.907 Shanghai Thu May 5 2016)
clock offset is 2.8495 msec, root delay is 48.02 msec
root dispersion is 48.20 msec, peer dispersion is 31.69 msec

如果不能同步请先尝试交换机能否与NTP服务器通信