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User’s Manual of SGSD-1022 / SGSD-1022P
SGSW-2840 / SGSW-2840P
79
4.2.11 SNTP
Simple Network Time Protocol (SNTP) allows the Managed Switch to set its internal clock based on periodic updates from a
time server (SNTP or NTP). Maintaining an accurate time on the Managed Switch enables the system log to record meaningful
dates and times for event entries. You can also set the clock manually. If the clock is not set, the Managed Switch will only
record the time from the factory default set at the last bootup.
When the SNTP client is enabled, the switch periodically sends a request for a time update to a configured time server. You can
configure up to three time server IP addresses. The switch will attempt to poll each server in the configured sequence.
4.2.11.1 SNTP Configuration
You can configure the Managed Switch to send time synchronization requests to specific time servers (i.e., client mode), update
its clock based on broadcasts from time servers, or use both methods. When both methods are enabled, the Managed Switch
will update its clock using information broadcast from time servers, but will query the specified server(s) if a broadcast is not
received with the polling interval.
Figure 4-2-25 SNTP Configuration page screenshot
The page includes the following fields:
Object Description
• SNTP Client
Configures the Managed Switch to operate as an SNTP client. This requires at
least one time server to be specified in the SNTP Server field.
(Default: Disabled)
• SNTP Poll Interval
Sets the interval between sending requests for a time update from a time server.
(Range: 16-16384 seconds; Default: 16 seconds)
• SNTP Server
Sets the IP address for up to three time servers. The Managed Switch attempts
to update the time from the first server, if this fails it attempts an update from the
next server in the sequence.