as the switch powers on, it begins post, a series of tests that run automatically to ensure that the switch functions properly. when the switch begins post, the system, the rps, the master, the status, and the duplex leds turn amber for 2 seconds. the speed and the stack leds turn green for 2 seconds.

    as post continues, the system led blinks green, and the other leds turn off.

    the port leds turn solid green, and each port led turns off as the test successfully checks each port. if there is a failure associated with a particular port, that port led turns amber.

    when post is complete, only the syst and stat leds remain green. the mastr led is also green on a single switch or on a stack master switch.

    for information on operating status for the leds, go to the “leds” section on page 2-8.

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

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