Wireless bridge

Charles Wyble charles at thewybles.com
Thu Jun 18 12:13:12 CDT 2009


Might I suggest Ubnt.com ?

Or a vendor that I use.... http://www.wlanparts.com/category/ubiquiti/

Couple of these 
http://www.wlanparts.com/product/BULLET2-D13/Ubiquiti_BULLET2_and_13dBi_24GHz_Panel_Antenna__BULLET2D13.html 


(100.00 per side or so).


Peter Boone wrote:
> Hi NANOG,
> 
> I'm looking for some equipment recommendations for a wireless bridge between
> two locations approximately 500-800 meters apart. The current setup for this
> company has been extremely unstable and slow. I don't have a lot of
> experience in this area so I was hoping someone could give me a few
> pointers.
> 
> Currently, both locations are using Linksys WRT54GL's flashed with DD-WRT
> firmware (Yes, 802.11g. All extra bells and whistles are disabled in the
> firmware. They were set up for WDS so other wireless clients could connect
> to the same access point, with varying degrees of success. Not very
> important). They are connected to SmartAnt 2300-2500 MHz 14 dBi directional
> antenna mounted on the roof (extended pretty high for perfect line of
> sight). I'm not sure when they got these antenna exactly but I'm told it was
> when WiFi was very new. The network is very small so both locations share
> the same subnet (192.168.1.0/24).
> 
> They have gone through numerous Linksys access points over the years. The
> wireless settings are tweaked as best as possible, and we have found the
> connection to be most stable when the TX is limited to 6-9 Mbps.
> 
> We have explored other options as well. An internet connection at each
> location + VPN is out due to very slow upstream speeds (the buildings are in
> an industrial area, ADSL is the only option.) The max they offer on regular
> business accounts is 800 kbps up. T1 lines are even slower and even more
> expensive. They won't offer us any other solutions such as fibre. We have
> considered running fibre/coax but there is too much construction activity
> and other property in the way.
> 
> I'm looking into RouterBOARD right now, considering a RB433AH and R52H
> wireless card, but I'm not sure this will actually solve the problem. It's
> difficult to determine if the issue is with the antennas or access points
> (for example, after a good thunderstorm, the wireless link will be down for
> at least 12 hours, but will fix itself eventually. Resetting either access
> point will keep the link down for at least 30 minutes. Using an airgun on
> the access points tends to make them more reliable, even if they are clean
> and dust free. From the admin interface, each access point will report
> seeing a very good and strong signal from the other, yet they refuse to
> communicate until they feel like it a few hours later.)
> 
> Any suggestions welcome. I'm sure you can tell cost is a bit of a factor
> here but it will be easy for me to justify a higher price if I'm confident
> it will be effective.
> 
> While I'm at it, I've been reading along on the list for over a year now;
> thanks everyone for sharing your real world experiences :)
> 
> Peter
> 
> 




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