Linksys E4200 Performance Thread

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volitation
DD-WRT User


Joined: 30 Dec 2011
Posts: 91

PostPosted: Sat Jun 02, 2012 20:06    Post subject: Linksys E4200 Performance Thread Reply with quote
Firmware: dd-wrt.v24-18000_NEWD-2_K2.6_big-nv60k
Client Adapter #1: Netgear WNA1100 (ath9k_htc driver)
Client Adapter #2: Alfa AWUS036NH (rt2800usb driver)
Network Mode: N only
Spectrum: 2.4 GHz
Channel: 13 + 11
Channel Width: 40 MHz
Encryption: WPA2 (AES only)
Distance between Client and AP: 1 meter
Signal, Noise, SNR: -6, -90, 83
Connection speed reported by OS: 60 Mbps
Transmit Power: 71 mW

How to run test

Wired Client:
Code:
iperf -s -B 192.168.1.100 -f M -i 5 -t 25


Wireless Client:
Code:
iperf -c 192.168.1.100 -f M -i 5 -t 25 -r


Test results
------------

[ 4] 0.0- 5.0 sec 54.3 MBytes 10.9 MBytes/sec
[ 4] 5.0-10.0 sec 55.2 MBytes 11.0 MBytes/sec
[ 4] 10.0-15.0 sec 56.3 MBytes 11.3 MBytes/sec
[ 4] 15.0-20.0 sec 53.3 MBytes 10.7 MBytes/sec
[ 4] 20.0-25.0 sec 52.7 MBytes 10.5 MBytes/sec
[ 4] 0.0-25.0 sec 272 MBytes 10.9 MBytes/sec


With both the Netgear and Alfa Adapter, I get roughly 11 MB/s which is way better than what I used to get with my old router. If I go two metres away from the router, I get 8.5 MB/s. About 15 feet away with one wall in between, I get 6 MB/s.

The only 5 GHz capable devices I have right now are two smartphones and I'm barely getting 2 to 3 MB/s on both 2.4 GHz and 5 GHz (using iPerf app with the same commandline arguments as above).

I'll buy a 5 GHz adapter this week and run another test and post results.

If anybody else is willing to run a test with their ddwrt (or stock) running E4200, it'd be great if you could post results along with the build you're using.
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Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1243

PostPosted: Sun Jun 03, 2012 16:18    Post subject: Re: Linksys E4200 Performance Thread Reply with quote
volitation wrote:
Firmware: dd-wrt.v24-18000_NEWD-2_K2.6_big-nv60k
Client Adapter #1: Netgear WNA1100 (ath9k_htc driver)
Client Adapter #2: Alfa AWUS036NH (rt2800usb driver)
Network Mode: N only
Spectrum: 2.4 GHz
Channel: 13 + 11
Channel Width: 40 MHz
Encryption: WPA2 (AES only)
Distance between Client and AP: 1 meter
Signal, Noise, SNR: -6, -90, 83
Connection speed reported by OS: 60 Mbps
Transmit Power: 71 mW

How to run test

Wired Client:
Code:
iperf -s -B 192.168.1.100 -f M -i 5 -t 25


Wireless Client:
Code:
iperf -c 192.168.1.100 -f M -i 5 -t 25 -r


Test results
------------

[ 4] 0.0- 5.0 sec 54.3 MBytes 10.9 MBytes/sec
[ 4] 5.0-10.0 sec 55.2 MBytes 11.0 MBytes/sec
[ 4] 10.0-15.0 sec 56.3 MBytes 11.3 MBytes/sec
[ 4] 15.0-20.0 sec 53.3 MBytes 10.7 MBytes/sec
[ 4] 20.0-25.0 sec 52.7 MBytes 10.5 MBytes/sec
[ 4] 0.0-25.0 sec 272 MBytes 10.9 MBytes/sec


With both the Netgear and Alfa Adapter, I get roughly 11 MB/s which is way better than what I used to get with my old router. If I go two metres away from the router, I get 8.5 MB/s. About 15 feet away with one wall in between, I get 6 MB/s.

The only 5 GHz capable devices I have right now are two smartphones and I'm barely getting 2 to 3 MB/s on both 2.4 GHz and 5 GHz (using iPerf app with the same commandline arguments as above).

I'll buy a 5 GHz adapter this week and run another test and post results.

If anybody else is willing to run a test with their ddwrt (or stock) running E4200, it'd be great if you could post results along with the build you're using.


wow,

I get 40+ mb/s on most of my router:
here is what I use:

Build: 19298 - Std_usb_nas
40mhz: 2.4ghz
encryption: WPA2 AES
Interference mitigation: Enabled Mode 2
Preamble short
beacon: 101
distance 30 feet
Test Client: Intel Centrino 6300 450mb/s wifi adapter
Test Client2: Broadcom 9X serials M-PCI 450mb/s wifi adapter.

Speedtest.net test


dxxfer -f 100mb.bin -dest 192.168.1.115/NAS-TEST -store

(1) Transfer Succeeded: 100mb.bin written, 57.26mb/s
(2) Transfer Succeeded: 100mb.bin written, 59.01mb/s
(3) Transfer Succeeded: 100mb.bin written, 57.48mb/s
volitation
DD-WRT User


Joined: 30 Dec 2011
Posts: 91

PostPosted: Sun Jun 03, 2012 19:33    Post subject: Re: Linksys E4200 Performance Thread Reply with quote
Fractal wrote:

Test Client: Intel Centrino 6300 450mb/s wifi adapter
Test Client2: Broadcom 9X serials M-PCI 450mb/s wifi adapter.


Fractal wrote:
I get 40+ mb/s on most of my router


Was the transfer between the two wifi clients? What about if you try a transfer from a wired client to a wireless one?
SHoTTa35
DD-WRT User


Joined: 09 May 2011
Posts: 243

PostPosted: Fri Jun 08, 2012 14:22    Post subject: Reply with quote
I'm not doing IPerf but just regular copy/paste.

Windows 7 Intel 6300 AGN 5Ghz N to Windows Home Server 2011 1Gbps LAN.

WLAN to LAN - 25MB/s (200Mbps ) MAX is what I see.

LAN to WLAN - 12.7MB/s MAX - seems like something is holding it back and I can't figure it out.

Doesn't matter much as i'm usually not pulling data to the laptop and Xbox and WDTV are connected via LAN so they get all the bandwidth they need but still weird.

2.4Ghz around me is crowded as hell, got about 25-30APs. Still get about 6MB/s though.
Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1243

PostPosted: Fri Jun 08, 2012 14:59    Post subject: Reply with quote
yeah you need interference mitiagation mode enabled... that will help alot

send this command to the router

wl -i eth1 interference 2

from the administration commands, no reboot or anything necessary.

-Fractal
volitation
DD-WRT User


Joined: 30 Dec 2011
Posts: 91

PostPosted: Fri Jun 08, 2012 19:06    Post subject: Reply with quote
SHoTTa35 wrote:
I'm not doing IPerf but just regular copy/paste


File transfer will be slightly lower than what you would get with iperf because of protocol overhead. Those speeds are pretty good, though.
volitation
DD-WRT User


Joined: 30 Dec 2011
Posts: 91

PostPosted: Wed Jun 27, 2012 19:48    Post subject: Reply with quote
Firmware: dd-wrt.v24-19327_NEWD-2_K2.6_big-nv60k
Client Adapter: Alfa AWUS036NH (rt2800usb driver)
Network Mode: N only
Spectrum: 2.4 GHz
Channel: 13 + 11
Channel Width: 40 MHz
Encryption: WPA2 (AES only)
Distance between Client and AP: 1 meter
Transmit Power: 60mW

Test results
------------

[ 4] 0.0- 5.0 sec 41.9 MBytes 8.38 MBytes/sec
[ 4] 5.0-10.0 sec 32.3 MBytes 6.47 MBytes/sec
[ 4] 10.0-15.0 sec 31.5 MBytes 6.29 MBytes/sec
[ 4] 15.0-20.0 sec 28.8 MBytes 5.76 MBytes/sec
[ 4] 20.0-25.0 sec 32.2 MBytes 6.45 MBytes/sec
[ 4] 0.0-25.0 sec 167 MBytes 6.66 MBytes/sec

[ 4] 0.0- 5.0 sec 36.8 MBytes 7.35 MBytes/sec
[ 4] 5.0-10.0 sec 37.5 MBytes 7.50 MBytes/sec
[ 4] 10.0-15.0 sec 38.1 MBytes 7.62 MBytes/sec
[ 4] 15.0-20.0 sec 38.1 MBytes 7.62 MBytes/sec
[ 4] 20.0-25.0 sec 38.4 MBytes 7.67 MBytes/sec
[ 4] 0.0-25.0 sec 189 MBytes 7.55 MBytes/sec
blumman
DD-WRT Novice


Joined: 03 Aug 2012
Posts: 16

PostPosted: Sat Aug 04, 2012 11:04    Post subject: Re: Linksys E4200 Performance Thread Reply with quote
Firmware: dd-wrt.v24-18777_NEWD-2_K2.6_mega-nv60k
Client WLAN Adapter: Airport Extreme (Broadcom BCM43xx driver, MBA 2011)
Server LAN Adapter: Ethernet Controller (Broadcom 57765-A0 driver, MM 2010)
Server WLAN Adapter: Airport Extreme (Broadcom BCM43xx driver, MM 2010)
Network Mode: N only
Spectrum: 5 GHz
Channel: 48 + 46
Channel Width: 40 MHz
Encryption: WPA2 (AES only)

Distance between Client and AP: 8 meters (One concrete wall and one plastered wall)
Signal, Noise, SNR: -61, -86, 25
Connection speed reported by OS: 216 Mbps
Transmit Power: 75 mW

Distance between Server and AP: 1.5 meters (Free sight)
Signal, Noise, SNR: -29, -86, 58
Connection speed reported by OS: 300 Mbps
Transmit Power: 75 mW

My results are run against two Mac's so the result might look a bit different.

WLAN to WLAN

0.0-5.0 sec 24.8 MBytes 5.2 MBytes/sec
5.0-10.0 sec 31.0 MBytes 6.5 MBytes/sec
10.0-15.0 sec 32.0 MBytes 6.7 MBytes/sec
15.0-20.0 sec 32.1 MBytes 6.7 MBytes/sec
0.0-25.0 sec 6.0 MBytes 6.3 MBytes/sec


WLAN to LAN

0.0-5.0 sec 75.8 MBytes 15.8 MBytes/sec
5.0-10.0 sec 74.6 MBytes 15.6 MBytes/sec
10.0-15.0 sec 76.6 MBytes 16.0 MBytes/sec
15.0-20.0 sec 77.5 MBytes 16.2 MBytes/sec
0.0-25.0 sec 15.2 MBytes 16.0 MBytes/sec


I can't seem to get my devices to report 450 Mbps connection speed with this firmware. Sad

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Last edited by blumman on Sun Aug 05, 2012 20:50; edited 2 times in total
phuzi0n
DD-WRT Guru


Joined: 10 Oct 2006
Posts: 10141

PostPosted: Sun Aug 05, 2012 0:41    Post subject: Re: Linksys E4200 Performance Thread Reply with quote
volitation wrote:
Client Adapter #1: Netgear WNA1100 (ath9k_htc driver)
Client Adapter #2: Alfa AWUS036NH (rt2800usb driver)
Connection speed reported by OS: 60 Mbps

I'm curious... I take it by those drivers that you're using Linux? It's rather common for manufacturers to create buggy windows drivers that report the wrong connection speed, but I would expect open source drivers in Linux to report the correct speed. Did both adapters report 60mbps in the OS? Your initial results were ~90mbps of throughput that would require >=130mbps link rate.

Your initial results were straddling the line of performance for 100mbps Ethernet and I don't notice any mention of your nic, is it gigabit or 100mbps?

Is the xmit power the only change in your latest test?


@everyone - keep up the testing, it would be great to have more numbers to cover all the possible combinations of MIMO streams, channel widths, and spectrum to add to the wiki.

http://www.dd-wrt.com/wiki/index.php/Wireless-N_Throughput_Testing

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volitation
DD-WRT User


Joined: 30 Dec 2011
Posts: 91

PostPosted: Thu Aug 09, 2012 6:45    Post subject: Reply with quote
Yes, I'm using Linux on both ends. The desktop PC is running Fedora 16 x86_x64 and has a Gigabit port. The laptop on which I'm using the WiFi card, is running CentOS 6 32bit.

The WiFi drivers that I'm using are from the December 2011 build of compat-wireless.

I bought a few more wifi cards so I'll be running more tests the coming days so I'll check the reported speed again. I checked them only once before running the tests. It does seem to be reporting a lower speed than it really is so my guess is that they probably get updated when card is sending/receiving packets.

The transmit power is the only other change in my tests.

Edited to add: When a friend of mine came over to my place and connected his laptop to my WiFi, we got terrible speeds over WiFi with the same distance from the router. He was using 64 bit Windows 7 with its built in WiFi (I think it's a Broadcom one). I don't have a windows machine at the moment but I'll try to get one soon so we can compare the difference in speed.
Das_OSi
DD-WRT Novice


Joined: 28 Jun 2012
Posts: 43
Location: Germany

PostPosted: Thu Aug 09, 2012 7:56    Post subject: Reply with quote
Fractal wrote:
yeah you need interference mitiagation mode enabled... that will help alot

send this command to the router

wl -i eth1 interference 2

from the administration commands, no reboot or anything necessary.

-Fractal


Do you recommend this for every Broadcom Device or only for the E4200?

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