Wi-Fi bridge at 20 km

Question

WiFi

Hello, dear residents of Habrahabr!
I have such a task - I need to build a stable Wi-Fi bridge for 20 km. It is planned to use a pair of Ubiquitu NanoBridge M5.
The signal path runs 7 km through the city, the remaining 13 km through the fields. Some questions have matured:

1) As I understand it, the two routers are the same, are they connected directly by a twisted pair cable or a bridge of two NanoBridges?
2) How much will the ping increase on average?
3) What are the pitfalls?
4) Where to put the kit in case of failure? :)

I read similar questions and one of them suggested using this service. Here's a screenshot:


Just in case Manufacturer's website , Yandex.Market

Answer 1

You can consult on lan23.ru, there is a forum for wifi maniacs.
PS Not advertising.

Answer 2

1. For network equipment, it looks like a piece of cable. I have a bridge access point - a switch - an access point for distribution on the "client" side. Works fine.
2. Can be from a couple of milliseconds to a couple of hundreds and above. Depends on settings, signal strength, congestion and weather. Therefore, it is better to immediately disable broadcast packets for the bridge.
3. NanoStation may not be enough, besides, a solid antenna has a large windage - it can turn off with a strong wind. It is better to take AirGrid or bullets in combination with stronger segment-parabolic antennas.
4 If you find out, tell me :) In the future I want to change my bridge, but I have no idea what to do with the iron.

Answer 3

What frequency? on the 2.4GHz bridge a maximum of 2-3 kilometers and the speed will be low ...

Answer 4

Maybe I don’t understand something, but in the city, authorities can remove your antenna of such power from the roof of the house and take it for themselves.