[Voyage-linux] Setup Advice

[Edwin Whitelaw]

One possible solution is:

Two radios in your WRAP, one 5GHz for the backhaul (Master or Managed) 
and one 2.4GHz for the local AP.   Don't know if you have the 
radios/antennas for an 11 mi 5GHz link.  Another option is to look into 
the new 900MHz radios for your backhaul.

Also, while not recommended by some, it is possible to run two 2.4GHz 
radios on a single WRAP with one as backhaul and the other as AP.  Be 
prepared for some throughput loss and absolutely run as channels 1 & 11 
to minimize the radio interference.

Is bridging a hard and fast requirement?  Routing will give much better 
control over your traffic and makes things a lot easier.  I have also 
found that if there is any problem in your bridge configuration you can 
end up with no access via ethernet whereas a static IP on the port is 
fairly bullet proof as far as assuring you a reliable access on reboot.

Getting even more weird...

If you are running POE on your wire to the roof, you could put 48v on it 
and then do a DC-DC conversion on the roof to feed multiple WRAPs and a 
switch.  The higher voltage would keep the current down and allow a 
higher total power availability to handle the multiple devices on the roof.

With multiple WRAPs, you can largely avoid the interference problems 
caused by two radios on the same board plus isolate your customers from 
direct access to the backhaul.

Regards,

Edwin


> No I guess I don't really need a VPN but it is what I use to get a "true"
> ethernet bridge going (is there a better way?). The reason I need an
> access point is because the backhaul link is going to be going 11 miles.
> So it needs to be a dedicated link otherwise performace of the link goes
> down the drain. One side of the backhaul happens to be a great place to
> put up and AP. Normally I would just put up another WRAP board as the AP
> but we only have one ethernet line so that is not really an option.
>
> So here is the problem in a nut shell. I have one ethernet line to a roof
> top with no possbility of bringing more lines up. That roof top has line
> of sight to a main distribution tower that needs a wireless backhaul link
> to it. Also that roof top happens to be a great place for an Access point.
> How would you setup this link?
>
> P.S. Could you explain a little more about the madwifi VAP stuff. Maybe
> shoot me a quick example? I have not had time to use or learn about them
> yet but they sound really neat.
>
> Thanks,
>
>  _
> /-\ndrew
>
>   
>>> I need to add an access point into the mix normally I would just bridge
>>> the ethernet and wlan adapter but since the ethernet adapter is already a
>>> part of the OpenVPN bridge that does not work. How would you guys set
>>> this
>>> up to have a point to point backhaul and an AP all on a Wrap.2C (1
>>> ethernet 2 mini pci) any help?
>>>       
>
>
>
>
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> http://list.voyage.hk/mailman/listinfo/voyage-linux
>   

-- 
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Edwin Whitelaw, P.E.
New River Valley Unwired, LLC
2200 Lonesome Dove Dr
Christiansburg, VA 24073
540-239-0318