Hostapd: Wi-Fi Channels

Arend Van Spriel arend.vanspriel at
Mon Jul 24 01:36:42 PDT 2017

On Fri, Jul 21, 2017 at 5:06 PM, Matthew Phillips
<matthew1phillips at> wrote:
> Hi!
> I am running hostapd on linux in the 5GHz spectrum. I have a program
> that modifies the config file and then starts up hostapd using the
> selected channel. However when I restart hostapd, I have found that it
> will sometimes begin scanning channels instead of setting up
> correctly. However this doesn't happen with the lower channels (36,
> 40, 44, and 48, again 5GHz). Does anyone know why this might happen
> for higher channels (157-165)? Is this expected behavior, and is there
> a way to disable it?

On certain channels it is not allowed to initiate radiation unless
there is already a transmitter active hence the scan. This is all for
regulatory compliance so it can not be disabled if I am not mistaken.


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