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saintofinternet
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full duplex link....

Sat Feb 01, 2014 3:11 am

hi,

what is a better solution for using a full duplex link??

One RB with 2 WLAN card on each side or 4 units of RB-SXT??

and is it possible for RB-SXT to be used for a full duplex link as i have not been able to find any config for that though....
 
zyzelis
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Re: full duplex link....

Sat Feb 01, 2014 3:43 pm

Hello,
what purpose for fdx link? speed, latency or just tick, that you have fdx?
 
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karina
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Re: full duplex link....

Sat Feb 01, 2014 4:48 pm

Gregg Sowell has an excellent tutorial on this. Sorry forget url
 
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karina
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Re: full duplex link....

Sat Feb 01, 2014 4:49 pm

hi,

what is a better solution for using a full duplex link??

One RB with 2 WLAN card on each side or 4 units of RB-SXT??

and is it possible for RB-SXT to be used for a full duplex link as i have not been able to find any config for that though....
Not possible with single sxt ar each end
 
Lakis
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Re: full duplex link....

Sat Feb 01, 2014 8:58 pm

hi,

what is a better solution for using a full duplex link??

One RB with 2 WLAN card on each side or 4 units of RB-SXT??

and is it possible for RB-SXT to be used for a full duplex link as i have not been able to find any config for that though....
well full duplex is something like 100/100mbit tx/rx, at wireless is somehow different
4 units of SXT u have to use bonding technique
I have done several A-standard links 2wlan on one board but that was before N come out
for fun tomorrow Ill try bonding with 4 SXT in my lab Ill keep u informed

It just came to my mind on older MT OS version there was an option where u can select radio only to transmit or only to receive me myself never tried where basically u can do "full duplex" link :) like nstreme dual
 
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saintofinternet
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Re: full duplex link....

Sun Feb 02, 2014 5:40 am

hi,

thank you for the replies...

i checked the tutorial by Greg and its fantastic...

my question remains.... should we use one routerboard with 2 WLAN cards on each side?? or can we achieve the same using 4 SXT ( 2 on each side )
 
zyzelis
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Re: full duplex link....

Sun Feb 02, 2014 9:10 am

hi,

thank you for the replies...

i checked the tutorial by Greg and its fantastic...

my question remains.... should we use one routerboard with 2 WLAN cards on each side?? or can we achieve the same using 4 SXT ( 2 on each side )
Hello,
If enough 30/30Mbits capacity of link, better to use single unit on the side (SXT+needed antenna gain to reach distance) .
Now SXT's are with 600Mhz CPU's so they will handle easy given througphut.
Doubled link looks like you are using SFP modules with 2 fibers instead 1. It works, but there is no need to use it.
 
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saintofinternet
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Re: full duplex link....

Sun Feb 02, 2014 11:36 am

hey... thanks for the reply....

definately a full-duplex link will be having some more advantange of a half duplex link.......

so the question still remains... should a single routerboard with 2 WLAN cards or 4 SXT ( 2 on each side )
 
Lakis
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Re: full duplex link....

Sun Feb 02, 2014 12:19 pm

2 wlan on one board will give u more self interference (I have this kind of problems on A-standard) 4x SXT theoretically will give u much more throughput ill try this today
 
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saintofinternet
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Re: full duplex link....

Sun Feb 02, 2014 12:24 pm

2 wlan on one board will give u more self interference (I have this kind of problems on A-standard) 4x SXT theoretically will give u much more throughput ill try this today

hi thanks...

good to know you will be trying it today... can you please also tell me the results and how the layout was with what configuration you did...

it will be very helpful. i would really appreciate your input on this....

thanking you again...
 
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saintofinternet
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Re: full duplex link....

Sun Feb 02, 2014 12:27 pm

2 wlan on one board will give u more self interference (I have this kind of problems on A-standard) 4x SXT theoretically will give u much more throughput ill try this today

chk this following topic : http://forum.mikrotik.com/viewtopic.php?f=14&t=30815

might be of some help in your setup...
 
Lakis
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Re: full duplex link....

Sun Feb 02, 2014 7:57 pm

This is my first 40Mhz N test but I m not very happy with that too much self interference
test1.jpg
Ill remake test with RB800 in better conditions tomorrow + Ill do 2x 60Mhz Test -advanced channels

And one more thing I can not make nv2 to work dont know why (2xwlan on one board) - if u use 4xSXT it should work because wireless card basically are on separate boards
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Last edited by Lakis on Sun Feb 02, 2014 11:25 pm, edited 1 time in total.
 
n21roadie
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Re: full duplex link....

Sun Feb 02, 2014 9:23 pm

This is my first 40Mhz N test but I m not very happy with that too much self interference
test1.jpg
Ill remake test with RB800 and better conditions tomorrow + Ill do 2x 60Mhz Test -advanced channels

And one more thing I can not make nv2 to work dont know why (2xwlan on one board) - if u use 4xSXT it should work because wireless card basically are on separate boards
Signals are too high at -13,-16, -29dBm, you could and probably are overloading the radio cards at those levels, self interference is no surprise.
 
Lakis
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Re: full duplex link....

Sun Feb 02, 2014 11:09 pm

I try to lower the output power but no luck
wireless cards were not just overloading, u just cant imagine how much they were overheating :)

to saintofinternet in good condition u can get something around 200mbit TCP and 300mbit UDP using 40Mhz channel width
real question what I want to try is how much I can get using 60Mhz channel
 
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Re: full duplex link....

Mon Feb 03, 2014 12:27 am

I try to lower the output power but no luck
wireless cards were not just overloading, u just cant imagine how much they were overheating :)

to saintofinternet in good condition u can get something around 200mbit TCP and 300mbit UDP using 40Mhz channel width
real question what I want to try is how much I can get using 60Mhz channel
What antennas are used, what distance apart ?
 
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saintofinternet
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Re: full duplex link....

Mon Feb 03, 2014 3:49 am

hey lakis.... thank you for the initial test and report.... it will be quiet useful for all users on this forum i suppose.

i wonder if Mikrotik guys themselves have designed/developed such a link? and if yes what would be their configuration....
 
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saintofinternet
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Re: full duplex link....

Mon Feb 03, 2014 11:27 am

as what Greg has show in this tutorial here http://gregsowell.com/?p=2493 i am a bit confused now...

are there 4 units involved in the above setup?
 
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Re: full duplex link....

Mon Feb 03, 2014 5:40 pm

Is anyone using the layout suggested by Greg and using two boards self interference appears to a issue when one comment reports
............We have several of these full duplex links deployed where one radio is 5.x and the other radio is 3.65.................
 
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saintofinternet
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Re: full duplex link....

Tue Feb 04, 2014 4:01 am

:) i wish Greg and Normis themselves get into this conversation now at this stage :)
 
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saintofinternet
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Re: full duplex link....

Wed Feb 05, 2014 7:55 am

hi lakis...

any update on your test??
 
Lakis
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Re: full duplex link....

Thu Feb 06, 2014 12:27 am

Whats up guys sorry I was too busy last days I did not have much time to make outside test with good antenna, good distance, good conditions
but hire u are "room" tests
On this photo u can see how is performer test, I know its pathetic but what can I do :)
We have RB800 and RB435G 4x R52Hn, and yes Boards are to close so I reduce TX Power on four radio cards and yes still there is to much interference
testsm.png
In bonding technique I cant make nv2 to work strange radio cards were connected but no traffic passing - I was searching forum but no solution, nv2 and bonding - maybe not available yet
so bonding tests are made using nstreme
UDP test using 40Mhz channel width
2wlannv240.png
UDP test using 60Mhz channel width
2wlanstreme60m.png
There is no such big difference 20-30Mbit but in better condition I hope difference will be larger

REMEMBER THIS ARE AMATEUR TESTS :)
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Last edited by Lakis on Thu Feb 06, 2014 12:58 am, edited 11 times in total.
 
Lakis
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Re: full duplex link....

Thu Feb 06, 2014 12:30 am

UDP test using 1x1 wlan 60 Mhz channel width; protocol nv2
1wlannv260.png
And the Last UDP test 60 Mhz channel width; protocol nstreme
1wlannstreem60.png
REMEMBER THIS ARE AMATEUR TESTS :)
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saintofinternet
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Re: full duplex link....

Thu Feb 06, 2014 4:14 am

where did you get the 60 Mhz channel settings??
 
Lakis
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Re: full duplex link....

Thu Feb 06, 2014 11:38 am

Read this
http://wiki.mikrotik.com/wiki/Manual:Wi ... d_Channels
You need extra-channels license - this is not the same with super channel
write to mikrotik support they should enable this future on your account
 
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samflynn
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Re: full duplex link....

Wed Nov 16, 2016 8:11 am

hi,

what is a better solution for using a full duplex link??

One RB with 2 WLAN card on each side or 4 units of RB-SXT??

and is it possible for RB-SXT to be used for a full duplex link as i have not been able to find any config for that though....
I know it has been 2 years. But I was also wondering if you were able to create a full duplex link using 4 RB-SXT instead of having a 2 boards with 2 radios each?
Also the examples I found required 2 boards with 2 radios each.
 
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TomjNorthIdaho
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Re: full duplex link....

Wed Nov 23, 2016 11:20 pm

hi,

what is a better solution for using a full duplex link??

One RB with 2 WLAN card on each side or 4 units of RB-SXT??

and is it possible for RB-SXT to be used for a full duplex link as i have not been able to find any config for that though....
I know it has been 2 years. But I was also wondering if you were able to create a full duplex link using 4 RB-SXT instead of having a 2 boards with 2 radios each?
Also the examples I found required 2 boards with 2 radios each.
In a real-world working environment, I suggest building a link that is 1.5 times greater than the speed you want to accomplish in a full-duplex environment.
Thus - if you want 100 meg full duplex (total 200 meg max load) , then design and build to support a 300 meg link and use gig Ethernet links. This way you can have a full 100 meg up and a full 100 meg down and you have some reserve capacity for overhead.
Example - a properly built network using something like the Mikrotik DynaDish should and does sustain 100 meg up and 100 meg down (both at the same time). It will also even go faster.

North Idaho Tom Jones
 
InoX
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Re: full duplex link....

Thu Nov 24, 2016 12:58 am

hi,

what is a better solution for using a full duplex link??

One RB with 2 WLAN card on each side or 4 units of RB-SXT??

and is it possible for RB-SXT to be used for a full duplex link as i have not been able to find any config for that though....
I know it has been 2 years. But I was also wondering if you were able to create a full duplex link using 4 RB-SXT instead of having a 2 boards with 2 radios each?
Also the examples I found required 2 boards with 2 radios each.
I did it long time ago. But I was needing bonding, so set up that way. It worked very good for 2-3 years until water get inside the SXT. They had a design flaw and water was reseting them to default.
 
gerencia@e-digitales.com
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Re: full duplex link....

Thu Nov 24, 2016 1:59 pm

Just remember, bonding is not full duplex, nstream dual is.
Cheers.!

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