Planet IGSW-2840, Руководство пользователя

Страница: 77 / 671

User’s Manual of IGSW-2840
77
4.2.11 SNTP
Simple Network Time Protocol (SNTP) allows the Industrial Managed Switch to set its internal clock based on periodic
updates from a time server (SNTP or NTP). Maintaining an accurate time on the Industrial 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
Industrial 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 Industrial 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
Industrial 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 screenshot
The page includes the following fields:
Object Description
•
SNTP Client
Configures the Industrial 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 Industrial 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.