Re: Force use of 5GHz band

[James Prestwood <prestwoj@gmail.com>]

Hi Jonas,

On 9/14/23 10:44 AM, Jonas Große Sundrup wrote:
> Hi,
> 
> is there a way to force iwd to use the 5GHz flavor of a specific wifi?
> I am aware of BandModifier5GHz, but even with setting this to 1000 I
> still end up on the 2.5GHz band. That band specifically, however, is
> unfortunately suspect for some stability issues I'm facing and hence I
> would like to force iwd onto the 5GHz band to see if the problems still
> occur. That proves to be difficult, of course, if iwd is picking the
> 2.5GHz band…
> 
> Even though I do see that iwd probably has the better insight into band
> stability from a signal-strength point of view, any chance of
> overruling iwd's internal mechanisms here? (Or should I just crank up
> BandModifier5GHz by a couple of magnitudes?)

All we have now is BandModifier5GHz which is multiplied by the computed 
rank. The stock rank is based mainly on a data rate computation which is 
theoretical, but uses capabilities and signal strength to estimate.

1000 is pretty high, so essentially your 2.4GHz BSS's would need to have 
a rank 1000x larger than the 5Ghz ones. So either 5ghz is incredibly low 
signal, doesn't support HT/VHT, or maybe the IEs are malformed so the 
data rate isn't being computed correctly e.g. (defaulting to basic rates).

Do you have debug logs of the scan results?

> 
> 
> Thanks,
> Jonas
>