Roaming between 2 APs with WDS

[Víctor Andrés Andrés]

Hello. I'm trying to get wifi roaming in a linux embedded device. The 
network has been build with 2 Ubiquiti AP, with the same ssid and 
connected with wds to each other.
Actually, the kernel is 3.11 version. The wireless is Marvell sd8787 
with the mwifiex driver. Wpa-supplicant / wpa-cli version: 2.2 and iw 
tool version: 3.15.

I can connect to the wireless network, but not always connect to nearest 
AP. And if go to the other AP, the device never try to connect to this 
AP. It continues connected to the first AP. I think it isn't scanning 
the differrents situation.

If I scan the networks manually with wpa_cli, I get the same signal 
level for all the networks, -101 ??

#wpa_cli scan
#wpa_cli  scan_result
Selected interface 'mlan0'
bssid / frequency / signal level / flags / ssid
68:72:51:04:f8:06       2412    -101    [ESS]   WIRELESS_A
f8:8e:85:85:a3:05       2412    -101    [WPA-PSK-CCMP][ESS]     **
e4:c1:46:b4:bb:a8       2462    -101    [WPA-PSK-CCMP][ESS]     **
00:1f:c6:18:da:56       2452    -101    [WPA-PSK-TKIP][ESS]     **
30:46:9a:7c:7a:82       2412    -101    [WPA2-PSK-CCMP][ESS]    **
00:8e:f2:da:45:35       2462    -101 
[WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][ESS]    **
d4:ca:6d:95:1f:d3       2432    -101    [WPA2-EAP-CCMP][ESS]
c0:4a:00:79:fc:7a       2462    -101 
[WPA-PSK-CCMP+TKIP][WPA2-PSK-CCMP+TKIP][ESS]    **
00:50:7f:38:79:cd       2437    -101    [WEP][ESS]      **
00:1b:11:18:24:2b       2437    -101    [WEP][ESS]      *
00:26:5a:6e:15:75       2447    -100    [ESS]   **
d6:ca:6d:88:4d:e2       2422    -101    [ESS]   **
06:02:a4:3d:86:9d       2462    -101    [IBSS]  **
68:72:51:04:f8:16       2412    -101    [ESS]   WIRELESS_A
d6:ca:6d:95:1f:d3       2432    -101    [ESS]   **
d6:ca:6d:88:4e:a2       2437    -101    [ESS]   **
02:0c:42:1a:72:e5       2452    -101    [ESS]   **


Regards!