Problems using 'ax' mode

[Jorge Magno]

Hello,

I created a scenario with one controller connected to 1 switch and 3 APs connected to this switch. Also, each AP has ten stations connected. With that, my problem has been the following:

When configuring the 3 APs with "channel='36', mode='ax'" randomly some stations become inaccessible. That is, when I perform the ping, it returns the message Destination Host Unreachable. There doesn't seem to be any logic, as there are always different stations that remain inaccessible.

 

Also, there is no problem when I configure APs with "channel='1', mode='g'". I would like to know what the problem might be and how I can solve it because I want to use 'ax' mode.

Code attached.

[Ramon Fontes]

Hello,

Did you stop the network manager process??

Sent from my android

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[Ramon Fontes]

Things you have to consider for 802.11ax:
* only kernels 5.12+ support 6GHz channels. I've submitted a patch to
the link kernel for this
https://github.com/torvalds/linux/commit/28881922abd786a1e62a4ca77394a84373dd5279#diff-0a99ab0604ace54349b1df225157930c901f6696fcaa01991965bf639f49b046
* I haven't completed all the tests - this means that some new patch
might be necessary
* 6GHz imposes many different network setups. For example, when you
run your code, mn-wifi creates a text file named hostapd
mnXXXX_ap1-wlan1.apconf. This file contains all the information your
hostapd file needs to be running and my conclusion is that your
hostapd txt file is not running. You can run ps -aux | grep hostapd
and you will see no hostapd process running. If you run the text file
you get something like this:

sudo hostapd mnXXXX_ap1-wlan1.apconf
Pre-RSNA security methods are not allowed in 6 GHz
1 errors found in configuration file 'mn8380_ap1-wlan1.apconf'
Failed to set up interface with mn8380_ap1-wlan1.apconf
Failed to initialize interface

* You can find an example for 802.11ax at /examples/6GHz.py. However,
as I said, some new patches in hwsim might be necessary. I'd
appreciate any help/contribution on this.

[Ramon Fontes]

Hi,

I just submitted a new patch to the Linux kernel and 802.11ax works right now:

https://patchwork.kernel.org/project/linux-wireless/patch/20210906175350.1346...@gmail.com/