Before you install the switch in a rack, or on a table or shelf, power on the switch and verify that it passes the Power-On Self Test (POST). POST is an automatic diagnostic process that runs immediately when a switch is powered on. Its primary purpose is to verify the integrity and basic functionality of the switch hardware components before the operating system loads.

To power on the switch, plug one end of the AC power cord into the switch AC power connector, and plug the other end into an AC power outlet.

As the switch powers on, it begins the POST, and a series of tests run automatically to ensure that the switch functions properly. LEDs can blink during the test; the SYST LED blinks green, and the other LEDs remain solid green.

When the switch completes POST successfully, the SYST LED remains green. The other LEDs turn off and then reflect the switch operating status. If a switch fails POST, the SYST LED turns amber.

POST failures are usually fatal. Call Cisco technical support representative if your switch fails POST.

After a successful POST, unplug the power cord from the switch and install the switch in a rack, on a table, or on a shelf.