dfs-mode (no-radar-detect | none | radar-detec; Default: none) Controls DFS (Dynamic Frequency Selection).
none - disables DFS.
no-radar-detect - Select channel from scan-list with the lowest number of detected networks. In 'wds-slave' mode this setting has no effect.
radar-detect - Select channel with the lowest number of detected networks and use it if no radar is detected on it for 60 seconds. Otherwise, select different channel. This setting may be required by the country regulations.
This property has effect only in AP mode.
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