RB SEXTANT 5HnD for PtP setup Questions
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Vaako
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RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Thu Dec 15, 2011 2:23 am

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!!!
Regards,
Vaako

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RB SEXTANT 5HnD for PtP setup Questions

by cbrown » Thu Dec 15, 2011 2:28 am

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/stationti ... k-cpe.html
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Re: RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Thu Dec 15, 2011 4:52 am

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

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

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Re: RB SEXTANT 5HnD for PtP setup Questions

by InoX » Thu Dec 15, 2011 4:43 pm

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

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Re: RB SEXTANT 5HnD for PtP setup Questions

by cbrown » Thu Dec 15, 2011 4:46 pm

What about a one way transfer? Maybe we are running backups. Then we are limited by the port.
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Re: RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Thu Dec 15, 2011 6:59 pm

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.
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Vaako

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Re: RB SEXTANT 5HnD for PtP setup Questions

by InoX » Thu Dec 15, 2011 7:39 pm

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

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. :D

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Re: RB SEXTANT 5HnD for PtP setup Questions

by normis » Fri Dec 16, 2011 9:14 am

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
No answer to your question? How to write posts

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Re: RB SEXTANT 5HnD for PtP setup Questions

by CCDKP » Fri Dec 16, 2011 5:08 pm

Vaako wrote: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!!!


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.
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Re: RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Fri Dec 16, 2011 11:04 pm

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


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

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Re: RB SEXTANT 5HnD for PtP setup Questions

by InoX » Sat Dec 17, 2011 10:15 pm

make one yourself...
:lol: :lol: :lol:

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Re: RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Sat Dec 17, 2011 10:37 pm

@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 ?
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Vaako

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Re: RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Sat Dec 17, 2011 10:48 pm

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)
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Vaako

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Re: RB SEXTANT 5HnD for PtP setup Questions

by mahnet » Sun Dec 18, 2011 6:15 am

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.

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Re: RB SEXTANT 5HnD for PtP setup Questions

by JorgeAmaral » Mon Dec 19, 2011 5:51 am

Vaako wrote: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)


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,
Jorge Amaral

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Re: RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Wed Jan 04, 2012 11:34 pm

@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!
Regards,
Vaako

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mahnet
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Re: RB SEXTANT 5HnD for PtP setup Questions

by mahnet » Thu Jan 05, 2012 5:03 pm

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

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Re: RB SEXTANT 5HnD for PtP setup Questions

by Vaako » Thu Jan 05, 2012 6:55 pm

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!!!
Regards,
Vaako

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