SMC Networks SMC8624/48T manual Setting the System Clock, Configuring Sntp

BASIC CONFIGURATION

Setting the System Clock

Simple Network Time Protocol (SNTP) allows the switch to set its internal clock based on periodic updates from a time server (SNTP or NTP). Maintaining an accurate time on the switch enables the system log to record meaningful dates and times for event entries. You can also manually set the clock using the CLI. (See “calendar set” on page 4-76.)If the clock is not set, the switch will only record the time from the factory default set at the last bootup.

This switch acts as an SNTP client in two modes:

Unicast – 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.

Broadcast – The switch sets its clock from a time server in the same subnet that broadcasts time updates. If there is more than one SNTP server, the switch accepts the first broadcast it detects and ignores broadcasts from other servers.

Configuring SNTP

You can configure the 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 switch will update its clock using information broadcast from time servers, but will query the specified server(s) if a broadcast is not received within the polling interval.

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