topic Re: WLAN SSID [status] Probe in Wireless

WLAN SSID [status] Probe

Ibrahim Jamil — Sun, 04 Jul 2021 02:48:06 GMT

Hi Folks

Please have a look to attachment and advise me what is the reason of the problem and how to troubleshoot this?

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 18:57:08 GMT

What is the secuirty on your wireless network ?

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Wed, 09 Feb 2011 19:09:22 GMT

Hi Attached

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 19:45:44 GMT

I would do this first ... Create an SSID with no security. Attach your client and make sure all is good. THEN add your security in layers ... and see where it breaks. It looks like you are using MAC filitering? Is that right? Is your client on the approved list ?

What is your security ... WPA PSK or 802.1X?

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Wed, 09 Feb 2011 20:11:35 GMT

would y Please post me the most important commands witch y use when troubleshoot a client related Issue, from the controller to figure out,why this user is unable to connect or associate or even experiencing intermittent connection ,

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 20:15:29 GMT

You have a few options ...

1) In the WLC CLI do >client debug then post your findings here

2) In the WLC GUI click on clients and then find your problem client and then see what PEM state the client is in. Post back what that state says

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Wed, 09 Feb 2011 20:41:54 GMT

what the below mean?how can i reach it?

"PEM state "

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 20:44:46 GMT

monitor->clients->select your problem client and look at what state your policy is in ...

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Wed, 09 Feb 2011 20:48:50 GMT

Hi freind

thanks for ur reply, onother issue Pls Help,i have users got disconnected many time during the day what is the reason for that? btw all nic driver r up to date?however i have seen on the WCS the below errors:: unspecified errors"

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Wed, 09 Feb 2011 20:55:50 GMT

Attached PM

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 21:02:55 GMT

Do you have this SSID mapped to your managment interface of your controller? What else does the state say .. watch it ... looking for something other than start ...

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Wed, 09 Feb 2011 21:03:24 GMT

Hi Gorge

Pls Check the below debug,from client have problem

*Feb 10 00:01:07.711: 00:24:ba:6b:7f:99 Scheduling deletion of Mobile Station: (callerId: 24) in 5 seconds
*Feb 10 00:01:07.711: 00:24:ba:6b:7f:99 Scheduling deletion of Mobile Station: (callerId: 24) in 5 seconds
*Feb 10 00:01:12.642: 00:24:ba:6b:7f:99 apfMsExpireCallback (apf_ms.c:418) Expiring Mobile!
*Feb 10 00:01:12.642: 00:24:ba:6b:7f:99 0.0.0.0 START (0) Deleted mobile LWAPP rule on AP [00:1c:45:41:cd:90]
*Feb 10 00:01:12.642: 00:24:ba:6b:7f:99 Deleting mobile on AP 00:1c:45:41:cd:90(0)

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 21:03:34 GMT

can you explain some more about yout WLAN.. What security how many client what code is your wlc on etc ...

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 21:04:19 GMT

yea, i need more then that bud... thats just a small piece of the debug ..

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Wed, 09 Feb 2011 21:16:06 GMT

Hi Goerge

wlc code is 6,we have 802.1x for wireless client authentication,clients get ip's from ms.dhcp

Re: WLAN SSID [status] Probe

George Stefanick — Wed, 09 Feb 2011 21:20:01 GMT

Ok getting back to the client in probe state ..

1 Check your Radius server and see if that client is failling authentiction

2. Capture the entire debug on the client. When you see a client in the PROBE state it normally means its not getting on at all... I would double check the clients config . Also under WLAN are you using 802.1X+CCKM, just CCKM ... what?

As far as the clients disconnecting, are they in good coverage? What type of client, phone, laptop ?

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Thu, 10 Feb 2011 07:40:26 GMT

Hi and thanks for ur reply!

The User has Laptop and the signal srenght is Excelent,regarding security am using just 802.1X,

is the command to capture the client details"debug client from the controller

Re: WLAN SSID [status] Probe

George Stefanick — Thu, 10 Feb 2011 13:50:50 GMT

Understood, but need more deatils:

What rev are your controllers on

What 802.1X (PEAP?)

What encryption WPA/WPA2?

Do all the laptops disconnect at once? Do they disconnect at a certain time ?

Do the laptops disconnect or are they having application issues?

Also, can you post the entire DEBUG for the problem client ?

Re: WLAN SSID [status] Probe

Ibrahim Jamil — Thu, 10 Feb 2011 17:08:22 GMT

Hi Gorge

-full code 6.0.199.5

-802.1X -EAP

-encryption WPA/WPA2

- they disconnect at a certain time

-laptops disconnect than having application issues

Please see the below from the WCS 4.0 when client got disconnected

interface '802.11b/g'. Channel changed to '1' from '9' due to 'Interference'. Interference Energy before update is '-75' and after update is '-72'. Noise before update is '-91' and after update is '-92'. Interference before update is '-85' and after update is '-111'.

How do i check this interference and tacke it , it didnt appears on the controller

Re: WLAN SSID [status] Probe

George Stefanick — Thu, 10 Feb 2011 17:35:09 GMT

A few items ... Lets get back to basics ...

Your WCS should be on the same or higher version when comapired to your WLC. If you are running WCS 4 and have your controller on 6, your data in WCS may not be very accurate

On your client on your WLAN-->Advance-->Check boc session time out ... See is this is enabled, if it is disbale it for me

If you are using 2.4GHz 802.11b/g your access points should be on channels 1,6,11. I would not use any other channels other than 1,6,11

If you suspect interference, do you have a spectrum analyzer ? If you dont, on your wireless laptop you will see a noise floor figure, what does it say. It will be like -90 ..