Accton Technology ES3552XA, ES3526XA manual Setting the System Clock, Configuring Sntp

Basic Configuration 3

Setting the System Clock

Simple Network Time Protocol (SNTP) allows the switch to set its internal clock based on periodic updates from a Network Time Protocol (NTP) server. 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 4-62.)If the clock is not set, the 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.

For more robust, secure time updates from trusted servers, the NTP client can be enabled instead of the SNTP client. Using the NTP client provides more reliable time updates, since the updates are collected from many NTP servers, then filtered and selected using an algorithm that determines the most accurate time. The NTP client also uses authentication and encryption to ensure that updates are received from authorized servers only.

Note: The SNTP and NTP client cannot be enabled at the same time.

Configuring SNTP

You can configure the switch to send time synchronization requests to time servers.

Command Attributes

•SNTP Client – Configures the 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 switch attempts to update the time from the first server, if this fails it attempts an update from the next server in the sequence.

Web – Select NTP/SNTP, Configuration. Modify any of the required parameters, and click Apply.

Figure 3-21 SNTP Configuration

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