AX53U 5G wireless randomly stops working

Installing and Using OpenWrt Network and Wireless Configuration
1

Like the title said, the 5G network stops being broadcast, and any existing connections stop working. 2.4G still works just fine.

My device is a ASUS RT-AX53U running:
Firmware Version OpenWrt 23.05.5 r24106-10cc5fcd00 / LuCI openwrt-23.05 branch git-24.264.56413-c7a3562
Kernel Version 5.15.167

Logging into LuCi wireless settings and restarting the MediaTek MT7915E 802.11ac/ax/n device will resolve the issue.

It failed again during the night of Thursday to Friday, here are the logs: https://gist.github.com/ThaChillera/b785cc9b2cacc031261a41e0fd24f838

The logs around 00:45 seem especially interesting, although I have no idea what to do with them!

Any help would be appreciated, thanks :slight_smile:

2

The 5 GHz network goes down because of:

daemon.notice hostapd: phy1-ap0: DFS-RADAR-DETECTED freq=5260 ht_enabled=0 chan_offset=0 chan_width=3 cf1=5290 cf2=0

So choose a non-DFS channel and you should be fine (36, 40, 44, 48, 149, 153, 157, and 161)

1 Like
3

From RT-AX54 - the device supports background radar survey. This should be fiT for EU(ETSI) - 4 stronger HE80 options selecting typically unused DFS channel but allowing 3 fallbacks one of them non-dfs, might be different set of channels in other places. Check iw list for 4x20Mhz continuos bands based off 36 , 100 , 149, just list them here.

config wifi-device 'radio1'
        option type 'mac80211'
        option path 'ABCDEF'
+        option channel '116'
+        option channels '36 52 100 116'
        option band '5g'
        option htmode 'HE80'
        option country 'BE'
+        option background_radar '1'

THis device supports continuous background survey, so radar+noise is gathered and channel switch happens in an instant ipo typical 1-10min.
Basically check after day and week and dont set initial channel to ones where DFS is kicking you off.