Hi,
I got an e-mail from WI with a link to some customer story or something like that. It would be nothing special, but the text describes the connection of 2x2 that can exceed 300Mbps. As far as I know 300Mbps is the theoretical max I can get from MIMO 2x2.
It’s made using MT stuff, with RouterOS, do you MT guys think it’s possible ?
Company from Poland. I think that it’s only advertsite.
300Mbps of TCP, UDP?
it is a translation mistake. The pictures clearly show the speed to be 298Mbits. The text which says “speed over 300Mbit” should say “speed of 300mbit”
True… but it’s shown Tx/Rx Rate of 320mbps…
But doesn’t matter, theoretical max is 300 
Nope.. It is completely possible if you have hardware strong enough with 60 MHz channel (30+30MHz) to make 350 Mbit.. The Link speed would be 450Mbit.. Unfortunately the hardware which is made by MikroTik and which can do this is (RB9XX) not supported from MikroTik ROS to do this.. (What a shame)
The mentioned test is UDP. I can clearly say, it can be done by TCP if MikroTik will make driver for special channels as it was by AR92XX chipset family.
On 7XX platform with ROS6 you can do about 270Mbit, but CPU bunches 100pcnt.
Fancy below 300Mbps
This is not true. For 450Mbit link speed you have to have 3 chains. This has nothing to do with power of hardware, but with 802.11n 2x2 standards. Please refer to the 802.11n data rates table here. You will see that with two chains, 300Mbit is maximum: http://en.wikipedia.org/wiki/IEEE_802.11n-2009#Data_rates
I have 450 with two chains!
Give us some more details about this setup
Just 30 + 30 MHz channel width.
What devices do you use on both ends?
You can use Advanced Channels in RouterOS to achive the same setup, but 30+30 is not by 802.11n standard, which I was talking about above.
I am concerned about such poor knowledge of MikroTik staff of your own hardware and ROS abilities, but I am not that surprised, because poor knowledge ever was the biggest preacusion of any progress. That is may be the reason and explanation, why you dont support special channels on 9XX (AR93XX family), which is nearly twice CPU powerful as 7XX platform. I can make yu sure. your hardware can do with 2X2 MIMO easy 450link speed within 60MHz channel. If you dont know I can show you easily..
Insider, please read my post more carefully. 802.11n standard allows 300Mbit for two chains. This is a fact. You can use custom channels, but it is against the standard. It is possible in RouterOS to use advanced channels (30MHz or other) to achieve this, but this is outside of 802.11n standards. Ropeba shows a good example how to do this, if you don’t have to follow standards and regulations.
Stop it Normis, it looks silly. NV2 is not 802.11n anymore as well, Nstreme even tho, MikroTik showed, that he can do it.. Do it further! I was so disapointed when I found new RB9XX do not support what AR92XX family did.. Thats it. When we can estimated drivers for 9XX for super channel width?
You can test it on complete AR92XX family (RB7XX, R52n)
Your complaint was too vague and mentioned “not strong hardware” which is very misleading. If you are complaining about “advanced channel support” in AR93xx then it is a completely different question.
Only the guy who still speaks about N standard is your self. It is not cas if this is the standard or not. This is the case I am pulling over the MikrTik 350Mbit + on TCP.. But I dont have no AR92XX hardwra which is powerfull enough to do it.. Help us buddy!
Currently RouterOS has Advanced channel support only for AR92xx chipsets cards. It is specified in the documentation:
http://wiki.mikrotik.com/wiki/Manual:Wireless_Advanced_Channels#Hardware_support
AR93xx/AR95xx are newer chipsets and they uses different driver. Currently we haven’t made support for Advanced channel feature for those chipsets. We will look if we could add support for them in future.
You can use RB800 board and use AR92xx mini-pci wireless card and you will be able to get such speeds.