Allied Telesis AT-S63 - Manual (Page 229)

AT-S63 Management Software Menus Interface User’s Guide
Section II: Advanced Operations 229
Note
The event logs, even when disabled, log all AT-S63 initialization
events that occur when the switch is reset or power cycled. Any
switch events that occur after AT-S63 initialization are entered into
the logs only if you enable the event log feature. The default setting
for the event log feature is enabled.