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New Member

7925G voice drops for few seconds and then comes back fine

I am facing a specific problem regarding voice phone (7925G) with cisco 3700 AP in flex connect with local switching. The RF layer is fine and only voice is present at 5 GHz. Controller version is 7.6. 

The specific problem is the call from wireless phones get connected and for first few seconds voice is fine. Then after around 3 seconds the voice totally drops for few seconds and after that the call continues smoothly without any voice issues. This is repeating on many phones in the same location. Have you encountered any such thing and can you suggest where to look for?

VIP Purple

Hi Waqas,Sounds like a buggy

Hi Waqas,

Sounds like a buggy behavior,

Not sure you saw this on release note under open caveats. This indicate 7925G issues with FlexConnect local switching. So better to reach TAC & get their input in your case.


Symptom : 7925 phones dropping from FlexConnect Local Switching APs every few seconds.

WLC Debugs show:

*apfReceiveTask: Jun 27 02:42:06.878: 00:1b:d4:58:99:1c Freeing prev AID 9 on AP 34:db:fd:c3:0a:c0 slot 0
*apfReceiveTask: Jun 27 02:42:06.878: 00:1b:d4:58:99:1c apfHreapClientCreate (apf_80211.c:12306) Changing state for mobile 00:1b:d4:58:99:1c on AP 34:db:fd:c3:0a:c0 from Associated to Associated
*apfReceiveTask: Jun 27 02:42:06.878: 00:1b:d4:58:99:1c RUN (20) Change state to RUN (20) last state RUN (20)

AP debugs shows:

*Jul 16 08:10:24.039: A48B8A1C-0 Off Channel interrupt 1 0 0 0
*Jul 16 08:10:28.947: A4D72A74-0 31A84F - pak flags 0
*Jul 16 08:10:28.959: A4D75CF1-0 31A84F - pak flags 0
*Jul 16 08:10:28.959: A4D75FF2-0 31A84F - pak flags 0
*Jul 16 08:10:28.959: A4D762F9-0 31A84F - pak flags 0
*Jul 16 08:10:29.051: A4D8CE29-0 31A84F - pak flags 0
*Jul 16 08:10:29.055: A4D8D3D2-0 31A84F - pak flags 0
*Jul 16 08:10:29.055: A4D8D97A-0 31A84F - pak flags 0
*Jul 16 08:10:29.087: 31A84F - restart B0 300
*Jul 16 08:10:29.087: capwap_ap_mgmt: delete central info of mn 001d.a231.a84f

Conditions :

  • Release, FlexConnect Local Switching
  • WLAN is configured for WPA2-PSK

Issue not seen on laptops

Workaround : None.



*** Pls rate all useful responses ***

New Member

Seems a known bug.  Working

Seems a known bug.  Working with TAC.  will update here once i get more info.  


Hall of Fame Super Gold

What is the firmware of your

What is the firmware of your phone?

New Member

Hi phone firmware is

Hi phone firmware is 


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