[Sugar-devel] ESSIDs and BSSIDs, NM and Sugar

[Tomeu Vizoso]

On Fri, Aug 7, 2009 at 16:19, Martin Langhoff<martin.langhoff at gmail.com> wrote:
> Following the "let's make Sugar more deployable" theme that Daniel
> started a while ago, I am looking at something that Reuben mentioned
> last week he discovered in the field. Apparently, the Sugar + NM
> combination we ship (on XO OS 802) cannot do the BSSID migration that
> you would expect.
>
> In other words, if you have a school with more than 1 AP, you should
> normally set all the APs to the same ESSID, set them on different
> channels, work on the tx power if there are more than 1 per channel,
> etc. With such a setup, clients will dynamically assess which BSSID
> has better signal / noise and associate to that one.
>
> But we seem to fail at this. With our current stack we will always
> reassociate to the first BSSID we associated for that ESSID. See below
> for a bit of sleuthing...
>
> 2009/8/6 Daniel Drake <dsd at laptop.org>:
>> 2009/8/7 Martin Langhoff <martin at laptop.org>:
>>> Apparently, NM saves the BSSID (or the channel?) in its state file in
>>> .sugar (networks.conf?). So once you associate to network 'foo' one
>>> one BSSID, it will only ever reconned to that BSSID.
>>
>> No, this is Sugar that manages this file. So if there is any bug here,
>> it's a sugar bug.
>
> Just checked - ~/,sugar/default/nm/networks.cfg has a 'bssids' line
> for each ESSID. I don't have a chance to test here now (lack of gear &
> time here in Lima) but this will be interesting to track down.
>
>  ~~~
>
> Maybe there is something wrong in how we save multiple BSSIDs? Or
> maybe we shouldn't save the BSSID, and stick to just ESSIDs?

Dan, do you know anything about this?

Thanks,

Tomeu

> cheers,
>
>
>
>
> m
> --
>  martin.langhoff at gmail.com
>  martin at laptop.org -- School Server Architect
>  - ask interesting questions
>  - don't get distracted with shiny stuff  - working code first
>  - http://wiki.laptop.org/go/User:Martinlanghoff
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