Cisco Small Business 200 Series Administration Manual page 70

Administration: Time Settings
System Time Options
Time
The following methods are available for setting the system time on the device:
• Manual—User must manually set the time.
• From PC—Time can be received from the PC by using browser information.
The configuration of time from the computer is saved to the Running Configuration file. You must
copy the Running Configuration to the Startup Configuration to enable the device to use the time
from the computer after reboot. The time after reboot is set during the first WEB login to the device.
When you configure this feature for the first time, if the time was not already set, the device sets the
time from the PC.
This method of setting time works with both HTTP and HTTPS connections.
• SNTP—Time can be received from SNTP time servers. SNTP ensures accurate network time
synchronization of the device up to the millisecond by using an SNTP server for the clock source.
When specifying an SNTP server, if choosing to identify it by hostname, three suggestions are given
in the GUI:
- time-a.timefreq.bldrdoc.gov
- time-b.timefreq.bldrdoc.gov
- time-c.timefreq.bldrdoc.gov
After the time has been set by any of the above sources, it is not set again by the browser.
NOTE
Time Zone and Daylight Savings Time (DST)
The Time Zone and DST can be set on the device in the following ways:
• Dynamic configuration of the device through a DHCP server, where:
- Dynamic DST, when enabled and available, always takes precedence over the manual
configuration of DST.
- If the server supplying the source parameters fails, or dynamic configuration is disabled by the
user, the manual settings are used.
- Dynamic configuration of the time zone and DST continues after the IP address lease time has
expired.
• Manual configuration of the time zone and DST becomes the Operational time zone and DST, only if
the dynamic configuration is disabled or fails.
Cisco Small Business 200 Series Smart Switch Administration Guide
SNTP is the recommended method for time setting.
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