Problems and [possibly] bugs with WDS
Ricardo Galli
gallir
Sat Dec 14 14:43:16 PST 2002
Hi Jouni,
last days I've playing with WDS and bridging (with 2002-10 estable version) on several computers.
I followed your examples in README.Prism2. Find the report below.
CONFIGURATION OF BOTH APs
AP-A: ----------------------------------------------------
ponti:~# iwconfig
wlan0 IEEE 802.11-b ESSID:"Antoli"
Mode:Master Frequency:2.437GHz Access Point: 00:50:C2:01:96:14
Bit Rate:2Mb/s Tx-Power:7 dBm Sensitivity=1/3
Retry min limit:8 RTS thr:off Fragment thr:off
Encryption key:7569-6264-6D69-6C74-696D-3332-31 Encryption mode:restricted
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:1656 Invalid misc:1309 Missed beacon:0
wlan0wds IEEE 802.11-b ESSID:"Antoli"
Mode:Master Frequency:2.437GHz Access Point: 00:50:C2:01:96:14
Bit Rate:2Mb/s Tx-Power:7 dBm Sensitivity=1/3
Retry min limit:8 RTS thr:off Fragment thr:off
Encryption key:7569-6264-6D69-6C74-696D-3332-31 Encryption mode:restricted
Power Management:off
ponti:~# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.0050c2019614 yes eth0
wlan0
wlan0wds0
----------------------------------------------------
AP-B ------------------------------------------------
raquel:~# iwconfig
wlan0 IEEE 802.11-b ESSID:"Antoli" Nickname:"raquel"
Mode:Master Frequency:2.437GHz Access Point: 00:05:5D:D6:4B:DA
Bit Rate:11Mb/s Tx-Power:-6 dBm Sensitivity=1/3
Retry min limit:8 RTS thr:off Fragment thr:off
Encryption key:7569-6264-6D69-6C74-696D-3332-31 Encryption mode:restricted
Power Management:off
Link Quality:0 Signal level:0 Noise level:0
Rx invalid nwid:0 Rx invalid crypt:482 Rx invalid frag:0
Tx excessive retries:338 Invalid misc:1312 Missed beacon:0
wlan0wds IEEE 802.11-b ESSID:"Antoli" Nickname:"raquel"
Mode:Master Frequency:2.437GHz Access Point: 00:05:5D:D6:4B:DA
Bit Rate:11Mb/s Tx-Power:-5 dBm Sensitivity=1/3
Retry min limit:8 RTS thr:off Fragment thr:off
Encryption key:7569-6264-6D69-6C74-696D-3332-31 Encryption mode:restricted
Power Management:off
raquel:~# brctl show
bridge name bridge id STP enabled interfaces
br0 8000.00055dd64bda yes wlan0
wlan0wds0
----------------------------------------------------------------------
PROBLEMS
1. When there is traffic, which is very slow, among the two AP I get the following
errors in both APs:
...
Dec 14 22:56:18 ponti kernel: wlan0: adding automatic WDS connection to AP 00:05:5d:d6:4b:da
Dec 14 22:56:18 ponti kernel: wlan0: using pre-allocated WDS netdevice wlan0wds0
...
Dec 14 23:16:50 ponti kernel: wlan0: STA 00:05:5d:d6:4b:da TX rate raised to 55
Dec 14 23:16:50 ponti kernel: wlan0: STA 00:05:5d:d6:4b:da TX rate raised to 110
Dec 14 23:16:51 ponti kernel: wlan0: STA 00:05:5d:d6:4b:da TX rate lowered to 55
...
...
Dec 14 23:16:31 raquel kernel: wlan0: STA 00:30:65:1d:e6:3a TX rate lowered to 55
Dec 14 23:16:31 raquel kernel: wlan0: STA 00:30:65:1d:e6:3a TX rate raised to 110
Dec 14 23:16:51 raquel kernel: wlan0: STA 00:50:c2:01:96:14 TX rate lowered to 55
...
2. Sometimes it seems they try to "bypass" wds:
Dec 14 23:22:07 raquel kernel: wlan0: deauthentication: 00:50:c2:01:96:14 len=2, reason_code=3
3. Sometimes gives the following error:
Dec 14 22:51:27 ponti kernel: AP: packet to non-associated STA 00:40:43:05:66:00
But 00:40:43:05:66:00 is an ethernet! (Nokia ethernet router).
4. If a wireless station C is connected to AP-B:
C ~~~~~ AP-B ~~~wds~~~~~ AP-A
AP-A cannot connect to C for a long period (more than 5 minutes) if
before was connected to AP-A. I'm not sure if it's a problem of the STP or WDS...
And one not related to WDS: if hostap is compiled as module against 2.4.20 and the
last pcmcia modules version, hostap_crypt_wep is not loaded automatically.
Regards,
--
ricardo galli GPG id C8114D34
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