[RT-N66U][EA-N66] Problems setting up ethernet adapter mode

[eproxus]

Hi,

I have an Asus RT-N66U as my main router, running Tomato Shibby (1.28.0000 MIPSR2-116 K26 USB AIO-64K). I recently bought an Asus EA-N66 W900 to use as an ethernet bridge for my Xbox 360.

When trying to set up the EA-N66, I can't get it to connect to my existing 5 Ghz wireless network. The only way I can get it to connect is by using channel 149 and above. When using these channels, none of my other devices can connect to the wireless network (my Macbook Air for example). I live in Germany and I've tried both the German and United States country settings in my router for the 5 Ghz network. The following table show when I can and can't connect my respective devices:

Ch    CW  CS     EA-N66       Macbook Air  Country
--    --  --     ------       -----------  -------
36    20         not visible  connects     DE
44    20         not visible  connects     DE
60    20         not visible  connects     DE
100   20         not visible  connects     DE

36    40  lower  not visible  connects     DE
60    40  lower  not visible  connects     DE
100   40  lower  not visible  connects     DE

36    40  upper  not visible  connects     DE
40    40  upper  not visible  connects     DE
56    40  upper  not visible  connects     DE
104   40  upper  not visible  connects     DE

36    40  lower  not visible  connects     US
60    40  lower  not visible  connects     US
157   40  lower  visible      disconnects  US
149   40  lower  visible      invisible    US

40    40  upper  not visible  connects     US
64    40  upper  not visible  connects     US
149   40  upper  visible      disconnects  US
161   40  upper  visible      connects     US

Ch - Channel
CW - Channel Width (Mhz)
CS - Control Sideband
EA-N66 - Network visible in the wizard of EA-N66
Macbook Air - Network connectable/visible by my Macbook Air
Country - The country setting for the 5 Ghz wireless network
​

The EA-N66 seems to be able to find all 2.4 Ghz networks without problems.

So, my question is, why can't the EA-N66 connect to any 5 Ghz below channel 149? Are there any settings/tweaks that can be made that would allow the EA-N66 to connect to my router together with my normal devices?

(Just ask, and I'll post any relevant settings of my Tomato setup, all wireless settings are at their default though, both advanced and basic, except country + channel + width + control sideband).

 

[eproxus]

After some more research, it seems the unit is stuck with the wireless region set to TW (Taiwan). When using telnet to connect to the unit, the following settings are set:

$ nvram get pci/1/1/ccode
$ nvram get pci/2/1/ccode
$ nvram get wl_country_code
TW
$ nvram get wl0_country_code
TW
$ nvram get wl1_country_code
$ nvram get regulation_domain
$ nvram get regulation_domain_5G

Setting all values to EU or US works, but after reboot wl_country_code and wl0_country_code are set back to TW. None of this affects the units ability to (not) discover my 5 Ghz network.