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Date: Sun, 08 Jul 2007 19:59:42 +0400
From: Sergey Matveychuk <sem@FreeBSD.org>
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To: Andrew Thompson <thompsa@FreeBSD.org>
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Cc: freebsd-current@freebsd.org
Subject: Re: iwi loses ssid
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Andrew Thompson wrote:
> On Sun, Jul 08, 2007 at 12:42:11PM +0400, Sergey Matveychuk wrote:
>> Hi.
>>
>> After I upgraded to Jul 1 CURRENT my notebook's iwi adapter started work 
>>  unstable. It loses carrier. When I take a look at ifconfig output I 
>> see a strange ssid. After I make ifconfig iwi0 ssid myssid, everything 
>> is recovered. Time between ssid losses is accidental. Sometimes minutes, 
>> sometimes hours.
>  
> Could you enable logging with 'wlandebug -i iwi0 +roam' and paste the
> output when it switches access points.

When everything OK:
ul  8 19:49:22 solem kernel: iwi0: sta_roam_check: currssi 80 currate 2 
roamrssi 14 roamrate 10
Jul  8 19:49:22 solem kernel: iwi0:  macaddr          bssid         chan 
  rssi  rate flag  wep  essid
Jul  8 19:49:22 solem kernel: - 00:19:5b:54:26:39 00:19:5b:54:26:39    6 
    44  54M   ess   no! "default"
Jul  8 19:49:22 solem kernel: + 00:16:e3:f3:c6:32 00:16:e3:f3:c6:32   11 
    39  54M   ess  wep  "ZXDSL531BII-1A0EE6"
Jul  8 19:49:22 solem kernel: + 00:18:f8:a3:7a:58 00:18:f8:a3:7a:58   11 
    80  54M   ess  wep  "sem-home"*
Jul  8 19:49:37 solem kernel: iwi0: sta_roam_check: currssi 80 currate 2 
roamrssi 14 roamrate 10

SSID is reseted to ZXDSL531BII-1A0EE6:
Jul  8 19:50:07 solem kernel: iwi0:  macaddr          bssid         chan 
  rssi  rate flag  wep  essid
Jul  8 19:50:07 solem kernel: - 00:19:5b:54:26:39 00:19:5b:54:26:39    6 
    43  54M   ess   no! "default"
Jul  8 19:50:07 solem kernel: + 00:16:e3:f3:c6:32 00:16:e3:f3:c6:32   11 
    38  54M   ess  wep  "ZXDSL531BII-1A0EE6"
Jul  8 19:50:07 solem kernel: ^ 00:18:f8:a3:7a:58 00:18:f8:a3:7a:58   11 
    80  54M   ess  wep  "sem-home"*
Jul  8 19:50:07 solem kernel: iwi0: sta_roam_check: ROAM: curRate 2, 
roamRate 10, curRssi 80, roamRssi 14
Jul  8 19:50:07 solem kernel: iwi0: link state changed to DOWN

How can I protect self from an alien AP?

-- 
Dixi.
Sem.