Roaming problem

[Anshuman Singh Rawat]

>From what I read in the manual about 'dump' is that it only prevents the printing of the messages. It does not prevent the data to be transmitted.

Do you know why the driver still receives while trying to associate, though ?

Thanks.

----- Original Message -----
From: Bud Smoker <irie at networks.org>
Date: Thursday, March 18, 2004 7:56 pm
Subject: Re: Roaming problem (Anshuman Singh Rawat)

> i am familiar with this error. it happens to me all the time, it is 
> one AP disconnecting you, and for some reason it seems the driver 
> will still receive them and allow them to interfere while 
> reconnecting to another AP.
> 
> i have found the way to make them disapear is to do:
> 
> iwpriv wlan0 dump 0
> 
> before association.
> 
> good luck,
> bud
> 
> 
> 
> --- Anshuman Singh Rawat <asr245 at nyu.edu> wrote:
> Hi all!  
> 
> We here are trying to modify the hostap  
> driver a bit, so that it does automatic  
> romaing (controlled by our driver) when in  
> host_roaming mode 2 (manual roam).  
>  
> We use a threshold value of signal strength  
> to make a decision about when to perform a  
> handoff.  
>  
> The problem is that sometimes while  
> performing an active scan, we see a lot of  
> "trash" being printed (when we run dmesg).   
>  
> ------------------------------------------  
> wlan0: LinkStatus: BSSID=00:20:a6:4d:1e:39  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>   A1=00:20:a6:4d:1e:39  
> A2=00:06:25:17:8c:50 A3=00:d0:06:26:9c:0a  
> A4=00:00:00:00:00:00  
> wlan0: TXEXC - status=0x0004 ([Discon])  
> tx_control=000c  
>   retry_count=0 tx_rate=0 fc=0x0108  
> (Data::0 ToDS)  
>  
> Any pointers on why this happens, would be  
> really appreciated.  
>  
> Thanks.  
> 
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