вообще то , все есть в документации к свичу на прилагаемом диске
Power on the Switch. After the runtime image and UART init are loaded to 100%, the Switch will allow 2 seconds for the user to press the hotkey [^] (Shift + 6) to enter the “Password Recovery Mode.” Once the Switch enters the “Password Recovery Mode,” all ports on the Switch will be disabled and all port LEDs will be lit.
