Wireless performance locks to 43Mbit on 5-ghz-turbo

RouterOS General
1

Hello,

I have a test setup which has a signal of -54dB it runs on both sides on a intel platform P4 2.8Ghz (775 socket) and P3 1Ghz (serverworks chipset) it uses both an MT 5211 radio that runs on 2.8.24.

But my troughput is low for it must can be. On 5Ghz-turbo and 5800 it stays on 43mbit, and when i enable nstreme on de systems i had only 23 mbit of data stream trough the router. This problem i had in bridged mode en in routed mode. My CPU does not rise to the 100% but max to 60% on the P3

greets,

Johan

2

Interference on the other band in Turbo?
Turbo works by bonding 2x 20MHz bands to 40MHz using adjacent channels.
Suggest trying adjacent channels in non-Turbo to see throughput, then try Turbo when they give good throughput.

Regards

3

No,

It couldn’t be the problem because the nodes stays now 4 meters beyond. I would place them for a 20 KM link but i would test the troughput first.

I can garantee there is no interference.

PS. Maybe could it be that the EMF from the cpu’s causes this problem?

but as it uses 2 channels could it use to 5820Mhz?

greets,

johan

4

Have you got any older versions of RouterOS to try?
Any other PC motherboards to try?
There are some “BIOS funnies” in certain boards, EPIA-V is a known problem with atheros/ethernet poor performance

The 5211 isn’t the problem IMHO, we’ve used those in extensive tests

Regards

5

I’ve tried jet a another p3 motherboard i’ve got a very badly result from approx. 300Kbit to max 2 Mbit.

But which chipset does works fine, is there a compatible list eith different chipsets of differt platforms.

I’ve got 1 new server it has a intel 915 chipset. Does someone have a config with the 915 to.

greets,

Johan

6

What’s the distance between the two nodes? I’ve had some problems with low throughput on nodes that were too close to each other.

7

aprox 2 meters, i’m going to test it on a greater distance

8

Do that - I suggest atleast 10-15m for 5GHz.

9

Johan, I’ve had similar problems as you’ve had. Tested at 2M and throughput was around 45-50mbps. Similar type of setup with 2 Intel-based servers just doing a b/w test with the newest betas…

10

I suggest you to use the latest stable release… With beta12 I got only 2 or 3 Mbps, but with 2.8.23 i’ve got 46 Mbps on more than 40 km.

11

Johan (the initial poster) wrote this:

it uses both an MT 5211 radio that runs on 2.8.24.

So I guess this doesn’t apply to his problems. My best guess is still the distance between the nodes. I tried again yesterday: Bandwidth between my two 5GHz nodes fell dramatically as I moved them closer to each other (parabolic dishes).

12

Hmmm … interesting to hear that ASM -

Anyone else got slow speed on 5GHz Turbo Nstreme on the latest betas?
13, 14 only give me 8Mbps rather than 75Mbps …

And we REALLY need 2.9 (with it’s TPC, DFS) in Europe too

Regards

13

I’ve test it @10m on a Nforce3 AMD64 and intel915 P4, with result 43 Mbit.

PS. I’ve got a 4 Minipci adapter from mikrotik but when i try to connect to an another system it won’t connect in a 1 slot mini-pci adapter it runs well.

14

I used 2.8.10 43 Mbit and 2.8.24 without nstreme 43 mbit with nstreme 23 Mbit

15

Seems like CPU problem… What procesors did you use? Nstreme is very CPU sensitive… The more, the better :slight_smile:

16

I use a 2.8 Ghz p4 and a 1 Ghz P3 on the other side.

17

Other problem could be signal correctness… Which is not a signal strenght

18

I am going to put the server on his place tommorow and we wil see what de throughput brings.

Johan

19

btw… what values did you set to data rates?