System time synchronization

System time synchronization refers to the process of coordinating the system time of your EX12 device with an external, more accurate time source. By default, this synchronization occurs one time per day, but will also synchronize at startup, and in response to a change in the route. There are two configuration parameters that control system time synchronization: ntpdate and system.time.resyn_interval.

The ntpdate default configurations include the following:

• Time zone: UTC

• NTP server: the Digi NTP server, time.digicloud.com

The system.time.resyn_interval default configuration includes the following:

• Frequency of the synchronization: 1d (one day). Set to O (zero) for no synchronization except at startup and route change.

No additional configuration is required for the synchronization if this default configuration is sufficient for your setup. However, you can change per-day synchronization, the default time zone, and the default NTP server, as well as adding additional NTP servers. If multiple NTP servers are added, time samples are obtained from each server. Selection algorithms are used to determine the most accurate time. See Configure the system time synchronization for details about changing the default configuration.

The EX12 device can also be configured to serve as an NTP server, providing NTP services to downstream devices. See Network Time Protocol for more information about NTP server support.

You can also set the local date and time manually, if there is no access to the configured NTP servers or modem time sources. See Manually set the system date and time for more information.