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List:       ipw2100-devel
Subject:    Re: [Ipw2100-devel] Very slow roaming or reassociation in WPA2 mode
From:       "Alejandro Bonilla" <abonilla () linuxwireless ! org>
Date:       2005-10-28 20:05:02
Message-ID: 20051028195910.M10390 () linuxwireless ! org
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On Fri, 28 Oct 2005 20:08:21 +0200, Rob Vandermeulen wrote
> Yes, i tested all drivers since 1.0.4 (with the appropriate firmware 
> / ieee and various combinations) and all wpa_supplicant versions 
> since 0.4.3 very extensivly (multiple settings to all involved 
> programs). I can't say i have tested every possible combination of 
> drivers and settings because that would be quite impossible :) . 
> Anyway, the WPA2 works fine when connecting for the first time ( 1-2 
> secs, sometimes less ), but my beef is with the roaming behaviour in 
> WPA2/Enterprise (with PEAP/MSChapv2 & CCMP) and the long - term 
> connection stability (disconnects wich can take up to half a minute 
> or even longer to reconnect after +- 4 or 8 hours after the initial 
> conenction). The problem isn't reliably reproducable ( the not 
> stable connetion problem ) and takes a long time to occur which 
> makes it pretty hard to collect decent debugging info, but i will 
> try to make some scripts to capture the appropriate logs when this 
> happens ( watching the screen for hours on end isn't doable, and 
> just logging everything for hours on end produces so much data that 
> finding the moment the error happened is hard, and prone to error )

You are right, we need to test this more. I used to have a lot more equipment
before but not so much now. I can't help ya there.

> 
> Kind regards
> Rob
> 
> PS : My APs+ MX are supposed to support "fast reauthentication & 
> seamless roaming" (vendorspeak), but information on that is very 
> sparse (it could be preauthentication or keycaching or hopefully not 
> some proprietary solution). wpa_supplicant seems to support preauth 
> but very little documentation is available about these subjects - if 
> anyone has more information i would gladly appreciate it

I think it would be great that you send an email to the hostap ML about the
wpa_supp re-auth. It could be a problem with the AP being weird with the auth
and making things get delayed on the Re-Auth or Re-keying.

The driver itself doesn't really get or knows about all this authentication or
keying methods, it just passes the key and the supplicant should do the rest.
Roaming was worked in the latest versions of the driver but there wasn't
really a problem. Some more roaming options that were implemented with the 2.4
FW don't have the code as per 1.0.8, maybe once this is done it could improve
your connectivity? Look at bug 809.

.Alejandro


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