Alarm LED is RED in c9800 wlc

[Leftz]

Two C9800s work as HA. Please see the below picture. In one of the two wlc, number 15 light is off and is red on the second wlc. Number 15 is "Alam LED" based on the description. Do you think its normal? why it happen? Thank you

[marce1000]

 - Attach a console , and or power cycle, the content of the alarm should be displayed on the console.

 M.

[Arshad Safrulla · Accepted solution]

You can issue the below command to check why the error is there

show facility-alarms status

My guest is that you have some ports which are in no shut status, but nothing is physically connected to the port. This alarm should disappear as soon as you shutdown the ports which are not in use.

[balaji.bandi]

Red	Controller error. For example, a temperature error exists. Note  When only one TenGig port is connected an alarm is triggered and the ALARM LED is always on and red. This does not occur when only one mGig port is connected.

what speed this device connected, also look at the switch side and also connect console and check what is the error ?

from GUI check logs :

https://www.cisco.com/c/en/us/support/docs/wireless/catalyst-9800-series-wireless-controllers/213949-wireless-debugging-and-log-collection-on.html

[Leftz]

Yes, after shut down the interface, the alarm disappear and the lights(in both wlc) are off. Thank you Arshadsaf and all. 

BTW, is there any difference between light 14 and 16? Both are for HA

[balaji.bandi]

Nice to know all good, we mark as resolved  now.