The relay can use one of two SNTP servers, the primary or the secondary server. The primary server is mainly in use whereas the secondary server is used if the primary server cannot be reached. While using the secondary SNTP server, the relay tries to switch back to the primary server on every SNTP request attempt to the primary server. If both SNTP servers are offline, event time stamps have the time invalid status.
The time is requested from the SNTP server every 60 seconds. Supported SNTP versions are 3 and 4. SNTP requires a high-performance server to meet the performance expectations.