Chapter 1
| Initial Switch Configuration
Setting the System Clock
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Summer Time/Daylight Saving Time (DST) – In some regions, the time
shifts by one hour in the fall and spring. The switch supports manual entry
for one-time or recurring clock shifts.
Setting the Time
Manually
To manually set the clock to 14:11:36, April 1st, 2013, enter this command.
Console#calendar set 14 11 36 1 April 2013
Console#
To set the time zone, enter a command similar to the following.
Console(config)#clock timezone Japan hours 8 after-UTC
Console(config)#
To set the time shift for summer time, enter a command similar to the
following.
Console(config)#clock summer-time SUMMER date 2 april 2013 0 0 30 june 2013 0
0
Console(config)#
To display the clock configuration settings, enter the following command.
Console#show calendar
Current Time : Jul 28 00:54:20 2015
Time Zone : Japan, 08:00
Summer Time : SUMMER, offset 60 minutes
Apr 2 2013 00:00 to Jun 30 2015 00:00
Summer Time in Effect : Yes
Console#
Configuring SNTP
Setting the clock based on an SNTP server can provide more accurate clock
synchronization across network switches than manually-configured time. To
configure SNTP, set the switch as an SNTP client, and then set the polling
interval, and specify a time server as shown in the following example.
Console(config)#sntp client
Console(config)#sntp poll 60
Console(config)#sntp server 10.1.0.19
Console(config)#exit
Console#show sntp
Current Time : Apr 2 16:06:07 2013
Poll Interval : 60 seconds
Current Mode : Unicast
SNTP Status : Enabled
SNTP Server : 10.1.0.19
Current Server : 10.1.0.19
Console#
