Question : 802.11ac - channel & config

[Charles Moulliard]

Thx Janusz for your reply and your help.

Here is more info collected based on your input. I have created a gist
ticket with hostapd config, result to run the command 'iw list' and what is
displayed in debug mode by hostapd -->
https://gist.github.com/cmoulliard/17eba8ed42b81afb064d

Remark : The new config does not work now and I don't get an error in the
log

Regards,



On Tue, Jun 24, 2014 at 9:18 AM, Janusz Dziedzic <janusz.dziedzic at tieto.com>
wrote:

> On 23 June 2014 13:09, Charles Moulliard <ch007m at gmail.com> wrote:
> > Hi,
> >
> > Something goes wrong with my config of hostapd 2.2 on a linux kernel
> > (3.14.7-200.fc20.x86_64). I have plugged an Edmix AC200 (WIFI USB) and it
> > works fine using this driver
> > (https://github.com/abperiasamy/rtl8812AU_8821AU_linux) and setup
> (hostapd
> > 2.2 + dnsmaq) but I can't change the channel to a value higher than 48
> and
> > bitrate is around 24Mbits/s (measured with iperf) between this machine
> and a
> > client (=MacBook pro)
> >
> > What is the issue ?
> >
> 64 - is DFS channel, so required HW that support radar detection +
> hostap config (country_code=, ieee80211d=1, ieee80211h=1)
>
> > sudo ./hostapd config_test.conf
> > Configuration file: config_test.conf
> > wlp0s20u2: IEEE 802.11 Configured channel (64) not found from the channel
> > list of current mode (2) IEEE 802.11a
> > wlp0s20u2: IEEE 802.11 Hardware does not support configured channel
> > Could not select hw_mode and channel. (-3)
> >
> > More debug output available here :
> > https://gist.github.com/cmoulliard/81aa9c7dc60c366f4724
> >
> > iwlist wlp0s20u2 channel
> > wlp0s20u2  32 channels in total; available frequencies :
> >           Channel 01 : 2.412 GHz
> >           Channel 02 : 2.417 GHz
> >           Channel 03 : 2.422 GHz
> >           Channel 04 : 2.427 GHz
> >           Channel 05 : 2.432 GHz
> >           Channel 06 : 2.437 GHz
> >           Channel 07 : 2.442 GHz
> >           Channel 08 : 2.447 GHz
> >           Channel 09 : 2.452 GHz
> >           Channel 10 : 2.457 GHz
> >           Channel 11 : 2.462 GHz
> >           Channel 12 : 2.467 GHz
> >           Channel 13 : 2.472 GHz
> >           Channel 36 : 5.18 GHz
> >           Channel 40 : 5.2 GHz
> >           Channel 44 : 5.22 GHz
> >           Channel 48 : 5.24 GHz
> >           Channel 52 : 5.26 GHz
> >           Channel 56 : 5.28 GHz
> >           Channel 60 : 5.3 GHz
> >           Channel 64 : 5.32 GHz
> >           Channel 100 : 5.5 GHz
> >           Channel 104 : 5.52 GHz
> >           Channel 108 : 5.54 GHz
> >           Channel 112 : 5.56 GHz
> >           Channel 116 : 5.58 GHz
> >           Channel 120 : 5.6 GHz
> >           Channel 124 : 5.62 GHz
> >           Channel 128 : 5.64 GHz
> >           Channel 132 : 5.66 GHz
> >           Channel 136 : 5.68 GHz
> >           Channel 140 : 5.7 GHz
> >           Current Frequency:5.24 GHz (Channel 48)
> >
> Please use iw list instead.
>
> > dabou at localhost Temp$ iwconfig
> >
> > wlp0s20u2  IEEE 802.11a  ESSID:"fuselab"  Nickname:"<WIFI at REALTEK>"
> >           Mode:Master  Frequency:5.24 GHz  Access Point:
> D8:50:E6:F3:96:C7
> >           Bit Rate:54 Mb/s   Sensitivity:0/0
> >           Retry:off   RTS thr:off   Fragment thr:off
> >           Power Management:off
> >           Link Quality=66/100  Signal level=48/100  Noise level=0/100
> >           Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
> >           Tx excessive retries:0  Invalid misc:0   Missed beacon:0
> >
> > Config used :
> >
> > interface=wlp0s20u2
> > ssid=fuselab
> > #channel=48
> > channel=64
> >
> > # WPA and WPA2 configuration
> > macaddr_acl=0
> > auth_algs=1
> > ignore_broadcast_ssid=0
> > wpa=3
> > wpa_passphrase=fuselab987
> > wpa_key_mgmt=WPA-PSK
> > wpa_pairwise=TKIP
> > rsn_pairwise=CCMP
> >
> > # Hardware configuration
> > driver=nl80211
> > wme_enabled=1
> > ieee80211n=0
> > ieee80211ac=1
> > hw_mode=a
> >
> Here you can use (v)ht40/vht80 - as I remember correctly 80211ac=1
> required also 80211n=1.
>
> BR
> Janusz
>



-- 
Charles Moulliard
Apache Committer / Architect @RedHat
Twitter : @cmoulliard | Blog :  http://cmoulliard.github.io
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