Maximum Adjustment; Synchronization Interval - D-Link DFL-1600 User Manual

11.2. Time Synchronization
11.2.3

Maximum Adjustment

To avoid situations where a faulty timeserver causes the product to update
its clock with highly erroneous time data, a maximum adjustment value (in
seconds) can be specified. If the difference between the current time in the
product and the time received from a timeserver is greater than the
maximum adjustment value, that timeserver response will be discarded.
For example, assume that the maximum adjustment value is set to 60
seconds, and that the current time in the product is 16:42:35. If a
timeserver responds with a time of 16:43:38, the difference is 63 seconds,
which is not acceptable according to the maximum adjustment. Thus, no
update will occur for that response. The default maximum adjustment
value is 36,000 seconds.
11.2.4

Synchronization Interval

The interval between each synchronization attempt can be adjusted if
needed. By default, this value is 86,400 seconds (1 day), meaning that the
time synchronization process is executed one time per day.
Example:
In this example, time synchronization is being setup using the SNTP
protocol and using NTP servers installed at the Swedish national
laboratory for time and frequency.
WebUI
:
System Date and Time:
Automatic time synchronization
Check Enable time synchronization.
Select the following from the dropdown lists:
Time Server Type: SNTP
Primary Time Server: dns:ntp1.sp.se
Secondary Time Server: dns:ntp2.sp.se
Tertiary Time Server: (None)
Click OK.
Enabling Time Synchronization using SNTP
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