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nissandata
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Joined: Fri Dec 03, 2010 7:20 pm

rb751-devices and getting good WiFi-Performance

Mon Aug 06, 2012 2:32 pm

Hi!

I have hade all sorts of wireless performance issues with the rb751-devices. Mostly to Apple-products (broadcom client cards).
The problem seems to presist over the newer routerOS versions and I've seen more here on the forums to have same issues.

What's your general tips for setting these up to a good/perfect level?

I mainly use these devides as just AP's and some times as wireless routers, in small setups. 1-5 devices and 5-20 end users.
Whats your impression of this device, others having performance issues?

Fixed Card rates, certain chans disabled, specific firmware/version?

I have a few networks to set up in the near future, and I have to solve this or look elseware, but my first option is theese Mirkotik-devices
 
vadyalex
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Re: rb751-devices and getting good WiFi-Performance

Tue Aug 07, 2012 11:12 am

I would also like to hear any success story since only solution I found is set up Linksys device as AP
 
vk7zms
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rb751-devices and getting good WiFi-Performance

Tue Aug 07, 2012 11:49 am

There is an issue that we have found where a device will go into "sleep" mode and disconnect from AP. When it wakes and reconnect, RB751 will only connect the device at basic rate
 
biomesh
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Re: rb751-devices and getting good WiFi-Performance

Tue Aug 07, 2012 4:46 pm

I had the basic rate symptom - would not really call it an issue with a few cell phones where the Tx rate would stay at the basic rate. I just set configured supported and basic data rates to be 24 Mbps and up and the devices have no problems connecting at full N rates now.
 
vk7zms
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rb751-devices and getting good WiFi-Performance

Tue Aug 07, 2012 7:11 pm

Good work around - I will give that a try
 
nissandata
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Posts: 34
Joined: Fri Dec 03, 2010 7:20 pm

Re: rb751-devices and getting good WiFi-Performance

Mon Aug 13, 2012 1:26 pm

More general wireless settings for the device are welcome...
 
krakenant
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Re: rb751-devices and getting good WiFi-Performance

Sat Aug 18, 2012 2:55 am

Did some toying around with the settings.

First, always disable chain 0 TX. That has been the single largest contributor to getting decent bandwidth.
If using N only, use advanced rates.
If using B G N use default rates.

I can get 35Mbps TCP throughput over it.
 
nissandata
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Posts: 34
Joined: Fri Dec 03, 2010 7:20 pm

Re: rb751-devices and getting good WiFi-Performance

Sat Dec 29, 2012 2:08 pm

Late add to this thread if some one still looks for an answer.
Setting regularity domain and country (in my case sweden) seems to have sloved all my wireless problems with the rb751's
 
Trackboy
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Location: Hungary

Re: rb751-devices and getting good WiFi-Performance

Sun Dec 30, 2012 9:45 am

"Mostly to Apple-products (broadcom client cards)"

I met this problem,i had got a Lenovo G580 laptop,and it has got Broadcom WLAN.In the first 5 minutes working fine,but after not worked .I used Ubuntu 12.04.Actually i have got RB 411 GL with R52n-M and RB 411 U with R52Hn and i tried connected to 751,but the bandwith,CCQ,Signal Strenght.....was very bad.
 
Trackboy
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Re: rb751-devices and getting good WiFi-Performance

Sat Jan 05, 2013 2:02 pm

Actually,in this month want to buy a Samsung Galaxy P6200 tablet,and i would like to know,if somebody has got experience using with 751-U2HnD,for any answer very appreciate
 
petar258
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Joined: Sat Jan 12, 2013 1:15 pm

Re: rb751-devices and getting good WiFi-Performance

Sat Jan 12, 2013 1:35 pm

If both Tx chains are enabled, speed is low and Tx CCQ is low. No matter what of Tx chains(0 or 1) is disabled things are better. Something is messed with both Tx chains enabled. Next is Tx power, if set manual tx power and no more than 19 dbm, all is ok. Setting regularity domain and country also works good but in that case current tx power is lowered(is this true?) to 14 dbm - i can not make difference between this and 19 dbm manual. I dont have external antenna yet, will test when it is available.
With all above settings, channel width 20/40 mhz, indoors, i get Tx/Rx CCQ 99-100%, P Throughput 109226 kbps and about 10 mb/s actual download.

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