[UKids] "XO-1 classrooms" don't reliably connect to many/most Wifi AP's

James Cameron quozl at laptop.org
Tue Feb 11 01:08:15 EST 2014

On Mon, Feb 10, 2014 at 11:31:39AM +1100, James Cameron wrote:
> On Sun, Feb 09, 2014 at 07:18:49PM -0500, Kevin Gordon Gmail wrote:
> > Tp link set as 3g router mode, with usb Sierra wireless usb modem,
> > set to channel 11, 80211g only, wpa2 pal security. Running stock
> > f/w.
> Terry found that channel 1 was the most afflicted.  I suspect, but I
> haven't checked, that the idle mesh only uses channel 1, but it also
> use whatever channel the laptop is associated with.

Tim's results from Open Firmware show that the idle mesh switches to
whatever channel is being used for association with an access point.

So while we would normally see an operating mesh on 1, 6 and 11, it
can be seen on other channels as well.

The underlying fault was somewhat channel specific ... because the
scans are done in sets; (1,2,3,4), (5,6,7,8), (9,10,11,12).  If a mesh
was heard on channel 1 then the scan results for channels 2, 3 and 4
will have been lost.  If a mesh was heard on channel 9, then the scan
results for channels 10, 11 and 12 will have been lost.

James Cameron

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