6GHz Wifi

6 GHz Wifi

6 GHz wifi needs to be advertised on 2.4 or 5 GHz

Clients use the “Reduced Neighbor Report” on the lower frequencies to avoid needlessly scanning the 6GHz band. Therefore OpenSOHO Requires you to select at least a 2.4 and a 5 GHz in the Wifi APs collection when selecting a 6GHz band.

When an SSID lands on an enabled 6GHz radio, OpenSOHO automatically enables the Reduced Neighbor Report (option rnr '1') on the 2.4/5 GHz radios on the same AP.

Recommended settings:

• Ensure you set a valid country in Settings. This is a hard requirement, since 6GHz is a regulatory hellhole and your radio wants to know in which country it is before enabling at all.
• For the radio:
  • Keep the tx_power_mode on auto. This translates to Luci: Maximum transmit power on driver default
  • Frequency auto works as expected
  • Set enabled to true

Encryption

6GHz Wifi has stricter security regulations (wpa3 minimum).

OpenSOHO will autoupgrade your encryption settings to comply with these 6GHz wifi regulations. e.g. when you choose psk2+ccmp as encryption on your SSID, OpenSOHO will auto upgrade this to sae on a 6GHz radio. This allows to have a backwards compatible encryption (important for older clients) on the classic 2.4 and 5 GHz frequencies.

Client specific PSKs (and the VLAN they assign) are WPA2 only, so they are not applied on 6GHz radios.

The resulting configuration looks like this:

ssh root@asusbt8 cat /etc/config/wireless  | grep "encryption\|wifi-iface\|wifi-device\|band\|option device" 
config wifi-device 'radio0'
	option band '2g'
config wifi-device 'radio1'
	option band '5g'
config wifi-device 'radio2'
    option band '6g'
config wifi-iface 'wifi_0_radio0'
    option device 'radio0'
    option encryption 'psk2+ccmp'
config wifi-iface 'wifi_0_radio1'
    option device 'radio1'
    option encryption 'psk2+ccmp'
config wifi-iface 'wifi_0_radio2'
    option device 'radio2'
    option encryption 'sae'

OpenWRT

Support for 6GHz on OpenWRT is still rolling out. You might want to have a look at OpenWRT issue 20276

OpenWisp-config

There is an issue the current release of the OpenWRT OpenWisp config daemon, where it does not remove the default SSID on the 6GHz radio: openwisp-config issue 272 I’ve made a PR that has been merged in the meantime, so expect a fix in the next release of openwisp-config.