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MSM4xx speed issue, recommended wlan chipsets?

 
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Maxxx
Frequent Advisor

MSM4xx speed issue, recommended wlan chipsets?

Hi,

Does anyone have some info about which wlan chipsets play nice with those MSM APs?
I tested an MSM422 running at pure N 5GHz with a Thinkpad T400s which has a built-in intel wifilink 5300 pcie card.
Wifi settings were set to no powersave, maximum performance.
The Notebook was directly in front of the AP.
Settings in the AP were Pure N 20/40 width, channel auto, internal antennas.

Running iperf from both linux and windows 7 resulted in about 4Mbyte/s to the access point's built-in iperf server.
File transfers to a fileserver connected via 1GBit to the accesspoint also didn't exceed 3MByte/s.
The accesspoint was either directly connected to a hp 1810G-24 using hp's poe injector, or connected to a cisco poe GBE switch.. rates didn't differ at all.


Are there any known limitations and/or speed issues with intel nics especially the wifilink 5300?

Which chipset would you suggest? What about Ralink?


Thanks very much for any info and help

Max
22 REPLIES 22
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Maxxx
Frequent Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

I should probably add that windows displayed the wifi rate as 300mbit/s
Highlighted
kianwei
Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

Concurrently only you (1 user) connect to that AP?
Highlighted
Maxxx
Frequent Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

Yes, only me
Highlighted
kianwei
Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

Any others wifi channel in your environment? Does latency is good from laptop to AP? Which firmware version you are running currently?
Highlighted
Maxxx
Frequent Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

Thanks for your support!

No other networks are using the 5GHz band. The AP is completely lonely ;)

Firmware version is 5.4.0.

I also got a MSM410 running the same firmware..
I'll try it with that one and report back.

Thank you,

Max
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Maxxx
Frequent Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

This is rather strange.

Here's the iperf log with two different fw's (still had the old 5.3 on that device)

BTW: ping delays are low.

fw: 5.3.1.0-01-7143





bin/iperf.exe -c 192.168.11.2 -P 1 -i 1 -p 5001 -f m -t 1000

------------------------------------------------------------

Client connecting to 192.168.11.2, TCP port 5001

TCP window size: 0.01 MByte (default)

------------------------------------------------------------

[148] local 192.168.11.50 port 49199 connected with 192.168.11.2 port 5001

[ ID] Interval Transfer Bandwidth

[148] 0.0- 1.0 sec 5.95 MBytes 49.9 Mbits/sec

[148] 1.0- 2.0 sec 5.82 MBytes 48.8 Mbits/sec

[148] 2.0- 3.0 sec 4.03 MBytes 33.8 Mbits/sec

[148] 3.0- 4.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 4.0- 5.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 5.0- 6.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 6.0- 7.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 7.0- 8.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 8.0- 9.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 9.0-10.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 10.0-11.0 sec 5.77 MBytes 48.4 Mbits/sec

[148] 11.0-12.0 sec 5.90 MBytes 49.5 Mbits/sec

Done.



bin/iperf.exe -c 192.168.11.2 -P 1 -i 1 -p 5001 -w 64.0K -f m -t 1000

------------------------------------------------------------

Client connecting to 192.168.11.2, TCP port 5001

TCP window size: 0.06 MByte

------------------------------------------------------------

[148] local 192.168.11.50 port 49200 connected with 192.168.11.2 port 5001

[ ID] Interval Transfer Bandwidth

[148] 0.0- 1.0 sec 6.54 MBytes 54.9 Mbits/sec

[148] 1.0- 2.0 sec 6.43 MBytes 53.9 Mbits/sec

[148] 2.0- 3.0 sec 6.53 MBytes 54.8 Mbits/sec

[148] 3.0- 4.0 sec 6.47 MBytes 54.3 Mbits/sec

[148] 4.0- 5.0 sec 6.55 MBytes 54.9 Mbits/sec

[148] 5.0- 6.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 6.0- 7.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 7.0- 8.0 sec 6.47 MBytes 54.3 Mbits/sec

[148] 8.0- 9.0 sec 6.49 MBytes 54.5 Mbits/sec

[148] 9.0-10.0 sec 6.61 MBytes 55.4 Mbits/sec

[148] 10.0-11.0 sec 6.45 MBytes 54.1 Mbits/sec

[148] 11.0-12.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 12.0-13.0 sec 6.49 MBytes 54.5 Mbits/sec

[148] 13.0-14.0 sec 6.54 MBytes 54.9 Mbits/sec

[148] 14.0-15.0 sec 6.58 MBytes 55.2 Mbits/sec

[148] 15.0-16.0 sec 6.52 MBytes 54.7 Mbits/sec

[148] 16.0-17.0 sec 6.54 MBytes 54.9 Mbits/sec

[148] 17.0-18.0 sec 6.51 MBytes 54.6 Mbits/sec

[148] 18.0-19.0 sec 6.45 MBytes 54.1 Mbits/sec

[148] 19.0-20.0 sec 1.28 MBytes 10.7 Mbits/sec

[ ID] Interval Transfer Bandwidth

[148] 20.0-21.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 21.0-22.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 22.0-23.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 23.0-24.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 24.0-25.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 25.0-26.0 sec 0.00 MBytes 0.00 Mbits/sec

[148] 26.0-27.0 sec 2.93 MBytes 24.6 Mbits/sec





fw: 5.4.0.0-01-8027



bin/iperf.exe -c 192.168.11.2 -P 1 -i 2 -p 5001 -w 64.0K -f m -t 1000

------------------------------------------------------------

Client connecting to 192.168.11.2, TCP port 5001

TCP window size: 0.06 MByte

------------------------------------------------------------

[148] local 192.168.11.50 port 49204 connected with 192.168.11.2 port 5001

[ ID] Interval Transfer Bandwidth

[148] 0.0- 2.0 sec 12.9 MBytes 54.0 Mbits/sec

[148] 2.0- 4.0 sec 12.8 MBytes 53.5 Mbits/sec

[148] 4.0- 6.0 sec 12.7 MBytes 53.2 Mbits/sec

[148] 6.0- 8.0 sec 12.8 MBytes 53.7 Mbits/sec

[148] 8.0-10.0 sec 13.0 MBytes 54.7 Mbits/sec

[148] 10.0-12.0 sec 13.0 MBytes 54.4 Mbits/sec

[148] 12.0-14.0 sec 12.8 MBytes 53.5 Mbits/sec

[148] 14.0-16.0 sec 12.9 MBytes 54.1 Mbits/sec

[148] 16.0-18.0 sec 12.7 MBytes 53.1 Mbits/sec

[148] 18.0-20.0 sec 13.0 MBytes 54.6 Mbits/sec

[148] 20.0-22.0 sec 12.9 MBytes 54.1 Mbits/sec

[148] 22.0-24.0 sec 12.8 MBytes 53.8 Mbits/sec

[148] 24.0-26.0 sec 12.9 MBytes 54.2 Mbits/sec

[148] 26.0-28.0 sec 12.4 MBytes 52.1 Mbits/sec

[148] 28.0-30.0 sec 12.8 MBytes 53.7 Mbits/sec

[148] 30.0-32.0 sec 12.9 MBytes 54.0 Mbits/sec







So the rates with the new firmware are stable.
When transferring a file I get 10mbyte/s with this unit, where's I only get 3mb/s with the msm422.

But it's very suspicious that rates in iperf seem to be capped at 54mbit.
This leads me to the assumption that either I configured something wrong in the AP, or that there's a problem with the laptop. But since this happens under linux and windows I don't think that it's very probable.

Do you know some settings in the Accesspoint which could lead to those poor results? I left everything at default except I disabled security filters, enabled wpa psk, set mode to pure N 5Ghz, cahnnel width auto, guard interval short..

I'll test with another notebook tonight.

Thank you!
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kianwei
Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

The results you perform previously is from MSM410 on ver5.4 firmware as well? I can read 3 test you performed.
The i-perf won't cap at 54Mbit. If you try wired connection you should getting near to full speed.
Try to use old firmware version like 5.3.1 it would be stable a bit in term of signal. Besides, try to use a/n instead of pure 'N'. Try to doing the test using the other laptop. Make sure is 5GHz n capable.
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Maxxx
Frequent Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

Hi, the first (unstable) result was with firmware 5.3.x
The results with 5.4 are stable.

I have N in 5 GHz mode.. Now you want me to test mixed mode N/a did I get you right?

Thnx!
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kianwei
Advisor

Re: MSM4xx speed issue, recommended wlan chipsets?

yes..so any update?