RB SEXTANT 5HnD for PtP setup Questions

Hardware MikroTik hardware general
1

Hello,

I’m about to order two RB SEXTANT 5HnD for a Point-to-Point setup.
They both wil be installed in line of sight and about 370 meters in between them.

What speed wil I achieve, is this predictable?

I already have contacted the Mikrotik Support and they say: We have achieved even 200Mbit real throughput speed.
I dont understand correctly, how can you messure 200Mbit/s if the Ethernet port of the SEXTANT 5HnD is only 100Mbit/s ???
Who is able to explain this me or do I misunderstand the whole concept of this product?

Thx!!!

2

You misunderstand. The throughput is from wireless interface to wireless interface. But yes with a 10/100 ethernet that will be your bottleneck.

This is in the same ballpark and gigabit.

http://www.balticnetworks.com/stationtiktm-5g-mimo-15dbi-5ghz-mimo-gigabit-mikrotik-cpe.html

3

So they should have used this board instead: RB711G-5HnD
It has an Gigabit ethernet port.

http://routerboard.com/RB711G-5HnD

4

lan have 100mbps full duplex that means 100down+100up. Go to school and do your homework. :laughing:

5

What about a one way transfer? Maybe we are running backups. Then we are limited by the port.

6

I can not find anything about 100Mbit/s TX & 100Mbit/s RX in the spects.

I find this stupid.
You have a car that can go 200Kph, the front two wheels do 100Kph and the back wheels do 100Kph, together thats 200Kph.
So the car actualy can go max 100Kph.

7

is common sense in networking

Full-duplex data transmission means that data can be transmitted in both directions on a signal carrier at the same time. For example, on a local area network with a technology that has full-duplex transmission, one workstation can be sending data on the line while another workstation is receiving data. Full-duplex transmission necessarily implies a bidirectional line (one that can move data in both directions).
Full Duplex means that if your switch port is 100 mbps - you can upload 100 mbps and download 100 mbps at the same time
Effectively your I/O throughput is 200 mbps
Duplex means two way communication simulataneously

so mikrotik can do 200mbps over wireless, 100 upload+100 download. :smiley:

8

I find this stupid.
You have a car that can go 200Kph

nope, it still can do 200mbit total, it’s called “full duplex” like InoX explained

9

Sextant’s might be a little overkill for 370 meters. At that distance you can use the less expensive SXT’s and you will still probably have to turn down the transmit power.

10

Yes you better go to school, there is no Bi-Directional signal available!!!

11

make one yourself…
:laughing: :laughing: :laughing:

12

@InoX

You have decreased my karma, Thx for that!
And the reason that you do that is that I do not listen.

I try to get some simple awnsers on how the 200Mbit/s is achieved and about the 100Mbit/s bottleneck.

I have to listen to you and if I do not agree you decrease my karma, have you ever heard of Freedom of speech ?

13

Full-Duplex is NOT possible with that kind of hardware!
If you want to get Full-Duplex (Bi-Directional) you wil have to have the folowing setup:

Full-Duplex hardware setup:
Transmitter → Receiver (TX on Frequency X)
Reiceiver ← Transmitter (TX on Frequency Y)
Two separate channels for Uplink and Downlink.
I now this would be very expensive and therefore only use by professionals.

How the hardware now work is:
TX/RX ↔ TX/RX (Tx and Rx on the same channel with or without bigger bandwidth option 20 or 40MHz)

14

use 40mhz, ros 5.9 or above with nv2. i have got 100 mbit uni-directional traffic over 5 km
when i run bandwidth test with both TX & RX it shows 50-55 mbit.
sextant is too much for 370 mtr. use SXT.
AND DO NOT WORRY FOR INOX.
he has that habit, did that to me as well. u keep up ur good work.

15

Full duplex is for the ethernet port.

Lets imagine that your devices can do 150Mb/s on the air. And you are doing a bandwidth-test on both directions.

You can achieve 75Mb/s up and down.

If you need a cheap full duplex radio link only with 802.11a/b/g support, you can use nstreme-dual.

Hope this helps,

16

@mahnet

Thx for your respond, you tell about your bandwidth test.
Is this with the Sextant or SXT devices?

Thanks!

@JorgeAmaral

Thx for explaining and advising to use nstreme-dual!
http://wiki.mikrotik.com/wiki/Nstreme_dual_Step-by-Step
I guess this is for devices that has two wireless cards on board!?

Thanks!

17

i have not used a sextant yet. my tests have been on 1)pair of sxt ptp and 2)r52hn ap and sxt clients

18

I was thinking to use two RB711G-5HnD with homemade Dual-Polarization Antenna’s.
So I guess I definatly get the speed that you have 50-55mbit.

The R52Hn I use this on an RouterStation Pro and does it’s job Perfectly!

Can you advice me software for benchmarking bandwidth a PtP connection but not the internal application?
I want to go out in the field and do some test with two Laptop’s and I dont now wich software to use for this testing purposes.

Any suggestions are welcome!!!