[K12OSN] wireless bridge setup for classroom clusters of thin-clients

Robert Moskowitz rgm at htt-consult.com
Sun Jul 15 14:13:09 UTC 2007

Greg X wrote:
> please see this image http://tmaedu.com/tmp/classroom-wireless.png
> i'm looking for network configuration help for setting up DD-WRT
> router firmware on two Buffalo WHT-G125 routers in a bridge
> configuration to allow thin-client PC's connected to bridge router to
> issue their boot image requests to the LTSP server.
> can someone suggest the DD-WRT network config to support this?
> the WHT-G125 has a 125mb/s mode that should support the speed needed
> for 4 terminals per classroom we require. i'll also turn the transmit
> power down from 28mw to 10mw so that multiple adjacent classrooms
> won't collide. 
Run your backbone (wireless bridges, WDS, pre-802.11s (we are having 
more 11s debates next week)) over 802.11a (5.6Ghz).  The 24 channels for 
11a give you about 11 usable channels and they don't interfere with your 
classroom 11b.  11a limitations are poorer wall penetration, and range.

Also important is setting each classroom up as a different SSID.  DO NOT 
hide the SSIDs.  No practical value (I wrote the paper on 'The Myth of 
Hiding SSIDs').  The 'terminals' will function better wirelessly with 
the APs being discoverable via SSIDs.

Your standard 11b/g channel usage is:  1,6,11.  These three channels 
give you excellent 2D coverage (3D though really needs 4 channels).

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