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Cisco 1850 acceess point not accepting clients

Posted on 2016-08-17
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Last Modified: 2016-09-05
Hi,

I have an issue with access point not accepting clients, they can see the SSID being broadcast but jsut do not connect. Can any one tell me the best debug commands to use on a wism2 to see client association requests and errors please?

some clients seem to connect and some do not. The same client connect fine to the same model of access point in the same AP group in other areas of the building. while other clients connect find to the ones they cant.

Seems completely random
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Question by:Aaron Street
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by:Craig Beck
ID: 41759841
Sounds like an interference issue to me. Can you look in the Wireless tab in the WISM GUI, choose 802.11b/g/n under Access Points and screenshot that please? Also show the client summary for a working and non-working client.
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by:Aaron Street
ID: 41760856
nope there is no inference on these access points, and there is no client summary for a non working client as it does not associate so do not appear on the WLC.

This happens for both 2.4 and 5ghz clients
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by:Aaron Street
ID: 41760888
here is the screen shot though

jenner first floor offices are the AP's affected, but all jenner AP's are the same 1852 and same settings / group
wireless.png
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Craig Beck earned 500 total points
ID: 41761142
Clients dont have to associate to show in the list. They authenticate before association so even with no proper link you should be able to see them.

Are the APs in Local or FlexConnect mode?

Can you try to connect a client to an AP and debug at the WLC CLI at the same time, and post the output?

debug client aa:bb:cc:dd:ee:ff
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by:Aaron Street
ID: 41762431
Sorry by associate I mean you dont even see them in any way on the controller. if you do a client debug you see the times the successfully connect but no sign of them at any other time.

so on my phone I can watch it saying "attempt tpo connect"

while on the Cli using a debug I seen nothing, then I switch wireless off on the phone and back on and it might then connect.  

AP's are in local mode.
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by:Aaron Street
ID: 41765069
I see this from a client debug

(WiSM-slot22-1) >debug client 98:01:a7:a3:1a:1f

(WiSM-slot22-1) >*Dot1x_NW_MsgTask_7: Aug 22 10:20:24.881: [PA] 1x: EAPOL frame with dst MAC 38:ed:18:ca:69:40 and BSSID 38:ed:18:ca:68:20 discarded
*Dot1x_NW_MsgTask_7: Aug 22 10:20:38.225: [PA] 1x: EAPOL frame with dst MAC 38:ed:18:ca:68:20 and BSSID 38:ed:18:ca:69:40 discarded
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by:Craig Beck
ID: 41765196
To me that sounds like the AP can't decipher the EAPOL packet's contents.

Can you swap an AP on the First Floor with an AP from another floor to see if that changes anything?
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by:Aaron Street
ID: 41784434
Unfortunately the problem is so erratic its hard to see even after doing this if it has made an improvement.

Starngly 2 of the AP where complaining of there power status (reporting they were powered by an injector rather than directly from a switch) which after a factory reset seems to have resolved its self.

Am continuing to monitor the situation.

Thank you for all the information I have CISCO TAC on the case now and will update you with any progress.
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