as the switch powers on, it begins post, a series of tests that runs automatically to ensure that the switch functions properly. when the switch begins post, the system, rps, status, duplex, and speed leds turn green. the system led blinks green, and the other leds are solid green.

    when the post completes successfully, the system led remains green. the rps led remains green for some time and then reflects the rps operating status. the other leds turn off and then reflect the switch operating status.

    if a switch fails post, the system led turns solid amber. the rps led is either solid or blinking amber. the other leds are off.

    post failures are usually fatal. call cisco systems if your switch does not pass post.