RB751U-2HnD joke in a box

RouterOS General
1

Hello everybody !

First of all, I want to apologize for my first noob post and my poor english.

I bought 2 units RB751U-2HnD, one is bought in Canada from Xagyl and another is from Slovakia Alza. I should read some forums before buying these units.

Lets start…

my setup:

Alienware m17x R4, Windows 8 64-bit, 32Gb ram DDR3 Corsair Vengeance, 2x Samsung 500Gb SSD 840 Pro, Ati 7970m 2Gb, Killer Wireless-N 1103 ( laptop wifi ), Qualcomm Atheros AR8151 PCI-E Gigabit ethernet card

  • Samsung Galaxy S4
  • Samsung Galaxy Nexus
  • PS3
  • Goflex NAS ( 2Tb )
  • QNAP NAS ( 2Tb )
  • 2x RB751U-2HnD
  • Thomson TWG870UIR
  • some TP-Link ( too lazy to get model number )

If I am connected to Thomson via wifi on Alienware, wifi shows 300Mbps and internet speed test shows about 68Mbps down and 45Mpbs up
If I am connected to Thomson via cable, internet speed is + - 20% same

RB751U-2HnD

If I am connected to RB751U-2HnD via wifi, internet speed test shows about 4 ( yes FOUR ) Mpbs down and up about 8 ( yes EIGHT )
same with Samsung Galaxy S4, Nexus and other devices…

same results with cable connection…so the bottleneck is RB751U-2HnD !!!

any device connected to Thomson or TP-Link shows maximum internet speed ( more or less )

I had RouterOs 5.25 then upgraded to 6.3 then upgraded again to 6.4 without ANY difference, same problems and same speed

RB751U-2HnD is running in “quick set” as AP or in “quick set” as Home AP, no queves, no special settings…performance is still same…

**/interface wireless print
Flags: X - disabled, R - running
0 R name=“wlan1” mtu=1500 mac-address=xx:xx:xx:xx:xx:xx arp=enabled
interface-type=Atheros AR92xx mode=ap-bridge ssid=“MT” frequency=2412
band=2ghz-b/g/n channel-width=20/40mhz-ht-above scan-list=default
wireless-protocol=802.11 antenna-mode=ant-a wds-mode=disabled
wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled
default-authentication=yes default-forwarding=yes default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=no security-profile=profile1
compression=**n

basically, I have 2 bricks with “Mikrotik” brand on it, but cant use it, because performance is 10x worse then TP-Link or Thomson for less then half price of Mikrotik

I will be very happy for any help. I tryed almost everything I have found on any forum about RB751U-2HnD. Maybe I should buy RB951G-2HnD, because RB751U-2HnD is just a big joke.

Paid about 120euro for 2 devices, which dont work as they should.




If somebody has some “good settings” script for RB751U-2HnD I can try it and test it.

Only good thing I was really impressed on RB751U-2HnD is unbelievable Wifi range.




cable connection to RB751:

http://imgur.com/fVIRIKF

wifi connection to RB751:

http://imgur.com/W0o78zJ

cable connection to Thomson:

http://imgur.com/KddPbVW

wireless RB751:

http://imgur.com/RpO5noY




Speed TEST screens:

RB751:

http://imgur.com/QPKz9t6

Thomson:

http://imgur.com/PyO34jQ

2

Did you ALSO update the firmware???

3

Yes, I did…performance is still horrible…

4

lower the output power, if distance is too close, you don’t need 1W of wireless output power, this will give you such results.

go into wireless settings, and set “card rates” to 14dBm or something like that,

5

Is your other access point still running when you are testing the RB751U-2HnD? (as in are they both sitting next to each other?)

For the frequency I generally find it best to avoid 2412 and 2462 as although the router seems to support it well, not every client device does when I test it. It’s too bad as 2412 is the default I believe. I would suggest starting at 2437 or if it is heavily populated choose 2417, or 2457.

I do have a dozen of those units and I am seeing much higher wireless throughput (~40mbit at them moment with lots of public users currently connected) in a congested environment.