Re: Change wireless interface "sens" value how?

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On Mon, Feb 14, 2011 at 4:12 PM, John W. Linville <linville@xxxxxxxxxx> wrote:

> Neither -- the driver (like all mac80211-based drivers) simply does
> not support that setting.  mac80211-based drivers are simple, and
> they don't do roaming by themselves.  Instead they rely on a userland
> component (e.g. wpa_supplicant) to take care of roaming for them.
>
> Unfortunately, I don't know of any roaming "knobs" to turn for
> wpa_supplicant (or NetworkManager) -- maybe it would be nice to
> have one.  Even if it were there, I suspect that control of that
> "knob" would have to flow through NetworkManager if you are using it.
>
> John

Yes I eventually homed in on the reality that you just described.  I
was able to get an ipw2200 based laptop to roam nicely as the driver
did support the sens parameter - and it did switch over to another AP
when the signal from the first went near non-existent - which was what
I was after.  However it seems that using my netbook with an ath5k
driver based wireless internal simply won't be able to do it whatever
I do - is there anyone working to make mac80211 drivers more
sophisticated in the future?  Maybe roaming is not high on most user's
agenda? But the main, and separate, issue I have is with initial
selection of a weak AP signal when a strong one (with same ssid) seems
more logical - and I don't know if this is something that is within
the realm of the driver, the NM code or wpa_supplicant?

I am not sufficiently knowledgeable to know what is possible here.

I would certainly appreciate knowing what is possible, and what
provides the limitations?
-- 
mike c
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