WRT1900ACS v2 5ghz only working on ch36

Installing and Using OpenWrt
1

Hi

I have a WRT1900ACS v2 running 17.01 Stable.

I am unable to get 5ghz working on any channel except ch36. I am fortunate at this stage that ch36 is not congested so the performance of my wireless is not suffering, however I dont think this is 'working as intended'.

Whenever I choose a channel other than 36, radio0 says it is either disabled or not associated. Rebooting does not help.

I have read through this thread: Wrt1900acs wifi 5ghz not working at all however I have the latest full wpad so I couldn't find any solution here that applied to me.

here is my current config, with ch104 selected (showing 'disabled or not associated' in luci)

config wifi-device 'radio0'
option type 'mac80211'
option hwmode '11a'
option path 'soc/soc:pcie-controller/pci0000:00/0000:00:01.0/0000:01:00.0'
option htmode 'VHT80'
option distance '15'
option log_level '3'
option country '00'
option txpower '17'
option channel '104'

config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option macaddr '62:38:e0:0b:b7:c9'
option ssid 'xxxxxxxxxxxxxx'
option key 'xxxxxxxxxxxxxx'
option encryption 'psk2+ccmp'
option ieee80211w '2'

config wifi-device 'radio1'
option type 'mac80211'
option channel '11'
option hwmode '11g'
option path 'soc/soc:pcie-controller/pci0000:00/0000:00:02.0/0000:02:00.0'
option htmode 'HT20'
option country '00'
option log_level '3'
option distance '25'

config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option macaddr '62:38:e0:0b:b7:c8'
option ssid 'xxxxxxxxx'
option key 'xxxxxxxxxxx'
option ieee80211w '0'
option encryption 'psk2+ccmp'

2

You might try setting management frame protection to optional or disabled (option ieee80211w '1' or '0') and increasing your distance a bit, maybe to 100, just to see if anything improves. You might also try setting country to your location.

3

Thanks mike.

I have already tried different distance options, as well as a proper localisation setting.

I will try some other ieee80211w settings and report back.

4

no changes with ieee80211w on 0,1 or 2.

ch36 still works fine no matter which other setting I change

I may do a full flash to stock if this issue persists.

5

Hello,

in my case I it is working now with the wapd-mini and used the hostapd-common. To use the "ieee80211w " you will need the wpad in full version as it is not part of the mini i guess.Together with this config everything is working:

config wifi-device 'radio0'
option type 'mac80211'
option channel 'auto'
option hwmode '11a'
option path 'soc/soc:pcie-controller/pci0000:00/0000:00:01.0/0000:01:00.0'
option htmode 'VHT80'
option country 'US'

config wifi-iface 'default_radio0'
option device 'radio0'
option network 'lan'
option mode 'ap'
option ssid 'NO VDSL 5 Ghz'
option encryption 'psk2+ccmp'
option key 'XXXXXXXXXXXXXXXXXXXXX'
option macaddr 'c2:56:27:d4:XX:XX'

option ieee80211w '0'

option wmm '0'

config wifi-device 'radio1'
option type 'mac80211'
option channel 'auto'
option hwmode '11g'
option path 'soc/soc:pcie-controller/pci0000:00/0000:00:02.0/0000:02:00.0'
option htmode 'VHT20'
option country 'US'

config wifi-iface 'default_radio1'
option device 'radio1'
option network 'lan'
option mode 'ap'
option ssid 'NO VDSL 2.4 Ghz'
option encryption 'psk2+ccmp'
option key 'XXXXXXXXXXXXXXXXXX'
option macaddr 'c2:56:27:d4:XX:XX'

Hopefully it helps for as well!

Regards..

6

the most common reason for this problem is leaving the country code set for
'00', change it to your country and see what you get.

David Lang

7

Thanks David,

I have already tried a few country codes with no success (AU, US, UK and world)

I will try the wpad-mini and hostapd combination and see if that helps

8

I had all but given up on this problem, just being content with running on ch36.

However whilst experimenting with sqm settings today, I decided to try setting the 5ghz to ch104 and.... it worked flawlessly

So I guess this is problem solved?....¯_(ツ)_/¯