[Commotion-discuss] HIgh volume performance

[Ben West]

Echoing Adam's recommendation to distribute the load of 100+ clients over
multiple nodes set to non-overlapping channels, with each node wired back
to whatever gateway device with cat-5 lines.  That is, don't bother with
wireless meshing if you can avoid it.  A single 802.11 channel won't
sustain that many clients, much less the meshing OLSR traffic.  So, say 10
nodes spaced evenly throughout the conference venue, where immediately
adjacent nodes are set to furthest possible channels (e.g channel 1 and
11).  Apply similar reasoning for dual-band access points; adjacent devices
need to not have their radios on adjacent frequencies.

Also, you probably will want to turn the TX power on each node *down as
much as possible*, as they will be operating in a very noisy environment at
close spacing.  RX sensitivity is preferred over trying to drown out noise
with TX power.

Finally, you'd want generous RAM available on the access points, so that
the firmware can service many clients.  Something like UBNT Rocket M2 (64MB
RAM), UBNT UniFi AP (64MB RAM), or even TP-Link TL-WDR4300 (128MB).  The
UBNT stuff would permit easier mounting on walls/poles, since the TP-Link
is only an indoor consumer-grade unit.




On Fri, Mar 20, 2015 at 10:32 AM, Adam Longwill <adam.longwill at gmail.com>
wrote:

> There will be issues with any device accepting more than 35 connection
> requests at a time due to the nature on 802.11 in general. You're going to
> have plenty of congestion with more than that and probably have hidden node
> problem issues without RTS/ CTS in that situation.
>
> Commotion is is OpenWRT with some configurations and OLSR running on the
> mesh interface which will reduce airtime overall. If anything, you should
> mitigate this by having multiple radios on multiple channels with ethernet
> meshing instead of a wireless mesh interface.
> On 20 Mar 2015 11:11, "David Banks" <david.adam.banks at gmail.com> wrote:
>
>> Hello Everyone,
>>
>> Has anyone  had experience using routers running commotion in high
>> volume, single building settings? I'm organizing a conference set for next
>> month and thought this would be an interesting application. Anyone know of
>> good commotion-compatible hardware that's capable of accepting 100+
>> connection requests at a time?
>>
>> --
>> -db
>>
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>>
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-- 
Ben West
http://gowasabi.net
ben at gowasabi.net
314-246-9434
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