[ath9k-devel] AR9380 frequent disconnect and stucks in AP mode.

[bhavesh.kamani at elitecore.com <bhavesh.kamani@elitecore.com>]

Hi Ben,

Thanks for the suggestion.

On windows client I run wireshark and not seeing any packets.


Thanks,
Bhavesh.


> On 05/08/2013 06:20 AM, Bhavesh Kamani wrote:
>>
>> Hi Team,
>>
>> I captured the packets in the locked state.
>> It looks like the AP is sending packets to client and client also sends
>> ACK
>> in the locked state.
>>
>> In the locked state client also sends null data frames. In the null data
>> frame I observed PM bit set to 0 and sometimes it is set to 1.
>>
>> Is there any way to make sure that packet is decrypted successfully on
>> client? OR Is there any mechanism which confirm the successful
>> decryption on
>> client side?
>
> If you run tcpdump on the client, do you see any packets received from the
> AP?
>
> If you have debugfs enabled in your kernel, 'ethtool -S wlan0' might show
> some
> useful stats (on a recent kernel)...
>
> You could also cat out the 'xmit' debugfs file, perhaps at:
> cat /debug/ieee80211/phy0/ath9k/xmit on both AP and client
> and see if the xmit queues have any backlog that will not clear?
>
> Thanks,
> Ben
>
>
>>
>> Thanks,
>> Bhavesh.
>>
>> -----Original Message-----
>> From: Bhavesh Kamani [mailto:bhavesh.kamani at elitecore.com]
>> Sent: Wednesday, May 08, 2013 6:15 PM
>> To: 'Felix Fietkau'
>> Cc: 'Ben Greear'; 'ath9k-devel at venema.h4ckr.net';
>> 'nishit.shah at elitecore.com'
>> Subject: RE: [ath9k-devel] AR9380 frequent disconnect and stucks in AP
>> mode.
>>
>>
>> Hi Flex,
>>
>> I tested this using hostapd-2.0 and compat-drivers-3.8.3-2-snp, but
>> still
>> facing the same issue.
>>
>> Thanks,
>> Bhavesh.
>>
>> -----Original Message-----
>> From: Felix Fietkau [mailto:nbd at openwrt.org]
>> Sent: Tuesday, May 07, 2013 5:47 PM
>> To: Bhavesh Kamani
>> Cc: 'Ben Greear'; nishit.shah at elitecore.com;
>> ath9k-devel at venema.h4ckr.net;
>> 'Jimit Mahadevia'
>> Subject: Re: [ath9k-devel] AR9380 frequent disconnect and stucks in AP
>> mode.
>>
>> On 2013-05-07 2:03 PM, Bhavesh Kamani wrote:
>>>
>>> Hi Ben,
>>>
>>> I tried compat-drivers-3.9-rc4-2-su, then also same problem I faced.
>>> I also tried compat-wireless-2.6.39-1 and compat-wireless-3.6.8-1, but
>>> facing the same issue.
>>>
>>> In a day more than one clients are facing the same issue.
>>>
>>> In the locked state, ping from client to AP not working and tcpdump on
>>> AP
>>> shows the echo response sent on wlan interface. Only few clients are
>> facing
>>> this issue frequently, but those clients don't have identical WiFi
>> hardware.
>>>
>>> Is it possible for hardware/firmware to drop the tx packets for
>>> particular
>>> client? For me look like only data packets are getting dropped.
>>> My environment is noisy, will it affect this situation?
>> You should also upgrade hostapd to something recent. It's relevant for
>> AP mode stability as well.
>>
>> - Felix
>>
>
>
> --
> Ben Greear <greearb@candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>
>