The STP status of the switch port to which the AP is connected is changed

SOLVED
Snika
Here to help

The STP status of the switch port to which the AP is connected is changed

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The STP status of the switch port to which the AP is connected is changed.
This symptom recurs daily and occurs on all switches.
As far as I know, APs don't participate in STP.
But why does the STP state change only on the port the AP is connected to?
1 ACCEPTED SOLUTION
ww
Kind of a big deal
Kind of a big deal

Every stp enabled port goes through this states. it does not matter if this is a trunk, access port or a client that doesnt send bpdu's

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6 REPLIES 6
Brash
Kind of a big deal
Kind of a big deal

The main issue in the loga shown are that the  port status is going down and then coming back up 4 hours later. The STP state change being logged immediately after the port status change is expected.

 

This port is a wireless AP.
 
As far as I know the wireless AP does not participate in STP.
 
I found from a web search that the NAC sensor might have internal AP detection.
 
I'm thinking of checking to see if there is such a feature in NAC.
ww
Kind of a big deal
Kind of a big deal

Every stp enabled port goes through this states. it does not matter if this is a trunk, access port or a client that doesnt send bpdu's

Snika
Here to help

Thank you for answer.
So, what action should I take?

GreenMan
Meraki Employee
Meraki Employee

As others have suggested - you probably need to focus on why the port went down   (and how it came back up again)    the STP messages you're seeing are expected, for a port going down, then recovering later.

I have set BPDU GUARD on the port since the issue occurred.
But the STP port change still happens.
I can't find any more reason
We are preparing to open a case for accurate cause analysis.
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