[Prism54-users] Getting stuck when out of range

[Claas Hilbrecht]

--Am Mittwoch, 2. Juni 2004 12:19 +0200 Feyd <feyd@seznam.cz> schrieb:

> Try to increase number of retries, the firmware disassocates too soon when
> the signal is weak. `iwconfig <iface> retry limit 14' seems to work best.
> The only question is why it refuses to transmit when the connection was
> reestablished later.

I don't think the link is weak. I'm using very strong antennas and get a 
link speed from about 1 MB/s via rsync and openvpn. With nttcp without 
OpenVPN  My test setup look like:

debian woody <-> lan <-> router <-> wlan <-> router with hd.

The wlan link is secured with OpenVPN.

>> 09:52:59.891625    eth2     Custom driver event:Authenticate request to
>> 00:04:E2:64:9F:4F  : REJECTED  (10)
>> 09:53:00.626477    eth2     Custom driver event:Link lost
>
> I suppose here the link broke?

Yes.

Now I'm running the test with "retry 14" on both sides. Same result:

fli4l:
10:33:47.989988    eth2     Custom driver event:Authenticate request to 
00:04:E2:64:9F:4F  : REJECTED  (10)
10:33:48.825101    eth2     Custom driver event:Link lost
10:33:49.784983    eth2     Custom driver event:Authenticate request to 
00:04:E2:64:9F:4F  : REJECTED  (10)
10:33:52.491856    eth2     Custom driver event:Authenticate request to 
00:04:E2:64:9F:4F  : ACCEPTED  (00)
10:33:52.494209    eth2     Custom driver event:Associate request to 
00:04:E2:64:9F:4F  : ACCEPTED  (00)
10:33:52.495130    eth2     New Access Point/Cell address:00:04:E2:64:9F:4F

eth2      IEEE 802.11b/g  ESSID:"xxx"
          Mode:Managed  Channel:6  Access Point: 00:04:E2:64:9F:4F
          Bit Rate:1Mb/s   Tx-Power=31 dBm   Sensitivity=20/200
          Retry min limit:14   RTS thr:2347 B   Fragment thr:2346 B
          Encryption key:DDEA-029D-6493-1C7C-9BD5-5691-0B   Security 
mode:restricted
          Link Quality:204/0  Signal level:-85 dBm  Noise level:-32 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

greebo (AP):
10:33:44.675546    eth3     Custom driver event:Disassociate request from 
00:04:E2:64:9F:37  (08)
10:33:44.935180    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:45.446767    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:45.447789    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:46.730259    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:47.241809    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:47.242833    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:49.943097    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:49.947947    eth3     Custom driver event:Authenticate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:49.949098    eth3     Custom driver event:Associate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)
10:33:49.950246    eth3     Custom driver event:Associate request from 
00:04:E2:64:9F:37  : ACCEPTED  (00)

eth3      IEEE 802.11b/g  ESSID:"xxx"
          Mode:Master  Channel:6  Access Point: 00:04:E2:64:9F:4F
          Bit Rate:54Mb/s   Tx-Power=31 dBm   Sensitivity=20/200
          Retry min limit:14   RTS thr:2347 B   Fragment thr:2346 B
          Encryption key:DDEA-029D-6493-1C7C-9BD5-5691-0B   Security 
mode:restricted
          Link Quality:210  Signal level:0  Noise level:48
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

-- 
 Claas Hilbrecht
 http://www.jucs-kramkiste.de