WLA/WLC Series
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WLA/WLC Series

Problem with Apple users

‎11-04-2011 04:38 PM

Hello. We are facing a problem with Apple users (MAC and iPhone). All users are disconected from AP each 30 minutes. I can't imagine where is the problem. Anybody can help me?

4 REPLIES 4
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WLA/WLC Series

Re: Problem with Apple users

‎11-05-2011 12:05 PM
  1. Can you be specific about which wireless AP's you're using? We have several including from Trapeze acqusition, but built-in SSG , etc as well
  2. And the type of authentication enabled?
  3. Are you doing 802.1X?
  4. Is this a new problem?
  5. If yes, what changed?
  6. If no, is this a new installation?

If I recall correctly 30min is the time period for re-synch of the WEP key

 

I also did a google search on "wireless 30 minutes drop" and got:

 

https://discussions.apple.com/thread/2711905?start=0&tstart=0

 

-looks like it may be an Apple bug. 

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WLA/WLC Series

Re: Problem with Apple users

[ Edited ]
‎11-05-2011 05:09 PM

Sorry for my incomplete post.

 

  1. WLA522 + WLC200 with MSS 7.5MR1
  2. WPA TKIP
  3. No
  4. No, it's happening since when I installed, and occours only in Apple devices.
  5. ...
  6. ...

I read something like preamble and other configurations that needed change in others vendors. 

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WLA/WLC Series

Re: Problem with Apple users

‎11-24-2011 09:09 AM

I received this update from J-TAC:

 

Thank Yo fro attaching the snapshot but as i see for the snapshot there is a few errors from the logs : we see

 

        MP Nov 11 10:48:06.275830 ERROR AP 8 radio: Handle TKIP MIC Error

        MP Nov 11 09:57:38.540241 ERROR AP 4 radio: Handle TKIP MIC Error

        MP Nov 11 09:52:29.910178 ERROR AP 8 radio: Handle TKIP MIC Error

        MP Nov 10 12:00:34.566131 ERROR AP 4 radio: Handle TKIP MIC Error

        MP Nov 10 11:45:50.023430 ERROR AP 8 radio: Handle TKIP MIC Error

 

If the recalculated MIC does not match the MIC received with the frame, the frame fails the integrity check. This condition is called a MIC failure. The access point or client discards the frame and also starts a 60-second timer.

If another MIC failure does not occur within 60 seconds, the timer expires.

However, if another MIC failure occurs before the timer expires, the

device takes the following actions:    

              ? An MP that receives another frame with an invalid MIC ends sessions with all TKIP and

                    WEP clients by disassociating from the clients. This includes both WPA WEP clients and

                    non-WPA WEP clients. The access point also temporarily shuts down the network by refusing

                    all association or reassociation requests from TKIP and WEP clients. In addition, MSS

                    generates an SNMP trap that indicates the MX port and radio that received frames with the

                    two MIC failures as well as the source and destination MAC addresses in the frames.

              ? A client that receives another frame with an invalid MIC disassociates from the MP and does

                    not send or accept any frames encrypted with TKIP or WEP.

 

to avoid this please issue the following commands :

 

           set service-profile rede_interna tkip-mc-time 0

           set service-profile rede_guest tkip-mc-time 0

 

This should ideally resolved client disconnect issue

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WLA/WLC Series

Re: Problem with Apple users

‎12-03-2011 01:49 AM

Would these commands also address a similar error on an wlc2800?

 

1 WARNING DOT1X_AAA_ERR: bad MIC on message 2; 

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