AP Impersonation alarm

[CSCO12400920]

Hi All,

I keep getting this alarm in Cisco Prime 2.2 send from the WLC 5508

AP Impersonation of MAC '5c:a4:8a:d7:f0:02' using source MAC '5c:a4:8a:d7:f0:02' is detected by authenticated AP 'AP_1' on '802.11b/g' radio and Slot ID '0'.

I am not sure if this is a bug on the WLC, we are currently running Image 8.0.110. 

[Saurav Lodh]

I think WLC hitting this bug

wireless clients are showing up under Rogue AP section.

CSCub63410

Description

Symptom:
Wireless clients shows up under Rogue AP section in the user interface of the WLAN Controller
Conditions:
Unknown
Workaround:
None

[CSCO12400920]

Thats what I thought, I will be updating the WLC image to 8.0.115 this week. Hopefully this upgrade solve this problem, I will update this discussion if the problem was solved by doing the upgrade.

thank you for your reply

[Jabo35810]

Anyone have an update on this? We ran into this today as well on a wism2 running 8.0.115. what's odd is we have 2 wism2's running this code (for redundancy...primary/secondary) we only have this problem on one of them.

[mohanak]

Refer the link : https://supportforums.cisco.com/document/19061/wireless-lan-controller-wlc-error-message-ap-impersonation-mac-000000000000-detected

[Bruno Dinis]

still got hundreads of AP Impersonation alerts in Prime Infrastructure every day.

Got 8.0.115.0 on 3 WLC.

That link refers, has unsupported debug comands like config ap remote-debug

still looking for what's causing this issue.

[Jabo35810]

Do you have ap authentication enabled?

[Bruno Dinis]

I don't think so. How can I check it?

edit: I don't have AP Authentication enabled 

[Jabo35810]

GUI to controller security/wireless protection policies/ap authentication/ look at your protection type. Is it set to ap authentication?

[Bruno Dinis]

No. Protection type = Management Frame Protection

[abwahid]

Hi,

same issue on the below post

https://supportforums.cisco.com/discussion/10145656/ap-impersonation-alarms-wcs-4183

[SWeidner11]

Is there a resolution to this issue?  Running Prime Inf ver 3.1 and WLC ver 8.0.133.0.

Thanks!