Wifi keeps dropping.. not sure why, looking for tips/suggestions on debugging this

[Mubeesh ali]

Hi Justin,

I see 7 beacon misses on the interface which is not good the client
disconnects on beacon miss...typically most ap's are configured to
send a beacon every 100 ms .  ..this looks similar
http://madwifi-project.org/ticket/1957


thanks,
Mubeesh
On Thu, Dec 16, 2010 at 11:16 PM, Justin V. <vic at yeaguy.com> wrote:
>
>
> On Thu, 16 Dec 2010, Mubeesh ali wrote:
>
>> can u completely not send any traffic or is this a random drop. If
>> random there could be interference causing replay counter mismatch.
>> This may force AP to drop the packet,  the ap may de authenticate
>> client if it sees continuous stream of such packets in a short
>> interval and force client to drop existing sessions like ftp.
>>
>> Please try changing the channel. If the client and AP are both A
>> capable please try using the A band as there are more non overlapping
>> channels and u may be able to find a channel with low interference.
>>
>>
>>
>> On Thu, Dec 16, 2010 at 10:46 PM, Justin V. <vic at yeaguy.com> wrote:
>>>
>>> I keep seeing my wlan0 interface go down..  I suspected a faulty wifi
>>> router.. i changed that out..
>>>
>>> Ive tried using WEP and WPA.  Currently using WPA.
>>>
>>> Here are the logs Im seeing..
>>>
>>> Dec 16 07:47:57 yeaguy wpa_supplicant[9492]: CTRL-EVENT-DISCONNECTED -
>>> Disconnect event - remove keys
>>> Dec 16 07:47:57 yeaguy kernel: wlan0: link state changed to DOWN
>>> Dec 16 07:47:57 yeaguy wpa_supplicant[9492]: CTRL-EVENT-SCAN-RESULTS
>>> Dec 16 07:47:57 yeaguy wpa_supplicant[9492]: Trying to associate with
>>> 00:22:6b:66:bf:74 (SSID='vicnet' freq=2462 MHz)
>>> Dec 16 07:48:07 yeaguy wpa_supplicant[9492]: Authentication with
>>> 00:22:6b:66:bf:74 timed out.
>>> Dec 16 07:48:07 yeaguy wpa_supplicant[9492]: CTRL-EVENT-SCAN-RESULTS
>>> Dec 16 07:48:07 yeaguy wpa_supplicant[9492]: Trying to associate with
>>> 00:22:6b:66:bf:74 (SSID='vicnet' freq=2462 MHz)
>>> Dec 16 07:48:18 yeaguy wpa_supplicant[9492]: Authentication with
>>> 00:22:6b:66:bf:74 timed out.
>>> Dec 16 07:48:20 yeaguy wpa_supplicant[9492]: CTRL-EVENT-SCAN-RESULTS
>>> Dec 16 07:48:20 yeaguy wpa_supplicant[9492]: Trying to associate with
>>> 00:22:6b:66:bf:74 (SSID='vicnet' freq=2462 MHz)
>>> Dec 16 07:48:20 yeaguy wpa_supplicant[9492]: WPA: EAPOL-Key Replay
>>> Counter
>>> did not increase - dropping packet
>>> Dec 16 07:48:20 yeaguy wpa_supplicant[9492]: Associated with
>>> 00:22:6b:66:bf:74
>>> Dec 16 07:48:20 yeaguy kernel: wlan0: link state changed to UP
>>>
>>> Given the errors seen what would be the best debug to use??
>>>
>>> wlandebug or tcpdump ??
>>>
>>> I went ahead and enabled since my logs are complaining about association
>>> and
>>> authentication..
>>>
>>> yeaguy# wlandebug -i wlan0 auth+assoc
>>> net.wlan.0.debug: 0x0 => 0xc00000<assoc,auth>
>>> yeaguy#
>>>
>>>
>>> Any tips would be appreciated.. I have an end user continually
>>> complaining
>>> of disconects over FTP..
>>>
>>>
>>> Thanks,
>>>
>>> justin v
>>>
>>>
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>>>
>>
>>
>>
>> --
>> Best  Regards,
>>
>> Mubeesh Ali.V.M
>> _______________________________________________
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>>
>
>
>
> Hi Mubeesh,
>
> It seems to be a random drop.. FTP will be humming along and then wlan0 will
> go down..
>
> I have the router set for channel 11...
>
> i do not have these types of drops with other wifi capable devices..
>
> ex.  WIN laptop, Playstaion 3... etc...
>
>
>
> rum0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290
>        ether 00:1e:e5:a8:bd:5a
>        media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
>        status: associated
> wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>        ether 00:1e:e5:a8:bd:5a
>        inet 192.168.1.169 netmask 0xffffff00 broadcast 192.168.1.255
>        media: IEEE 802.11 Wireless Ethernet OFDM/18Mbps mode 11g
>        status: associated
>        ssid vicnet channel 11 (2462 MHz 11g) bssid 00:22:6b:66:bf:74
>        country US authmode WPA2/802.11i privacy ON deftxkey UNDEF
>        AES-CCM 2:128-bit AES-CCM 3:128-bit txpower 0 bmiss 7 scanvalid 450
>        bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5
>        protmode CTS roaming MANUAL
>
>
>
> Also yesterday, I lost complete connectivity to the router while my WIN PC
> was connected and browsing just fine..
>
> I had to bounce the interface and reset the default gateway and my
> connection restored.
>
> I did:
>
> /etc/rc.d/netif restart && /etc/rc.d/routing restart
>
>
> Thanks,
>
> Justin