E2500 Configuration questions

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creddie
DD-WRT Novice


Joined: 23 Apr 2012
Posts: 16

PostPosted: Tue Apr 24, 2012 4:31    Post subject: E2500 Configuration questions Reply with quote
Hi this is my first post, lets see how it goes Wink

Previously I had a Linksys WRT54GL which I had flashed with both TomatoVPN and DD-WRT, so when I bought a new E2500 I was more than willing to flash it with DD-WRT.

Everything went fine and I have it now running v24-sp2 18946M NEWD-2 K2.6 Eko

I have it running in a room next to my living room, where I have a http://www.boxee.tv/.

Here's my question.

I have been streaming a lot of movies (720 & 1020) from a NAS (http://bit.ly/I6Uu97)that I have connected to my router running wires, to my Boxee, but most of the times I got buffering interruptions.

The problem was when I began to check the wireless speed of data transfers between the router and Boxee, which is actually 5 meters away, I saw very slow speeds so I began to debug the speed.

First I began with a 30-30-30 so my tests are reliable, the test is basically transfer a ISO file that I have in a NAS attached to my router, literally 20 cm away from the box, and then stream it into my laptop, all this using N protocol, in order to get the best speeds.

Ideally N protocol should give me around 150Mbps, but I can get anything more than 54Mbps.

1-
Here is the Bandwidth with the factory settings plus my security settings for WPA2 / AES
Transfer speed : 4.21 MB / s

http://dl.dropbox.com/u/14409260/1.png

2-
Here is the prior settings plus
Wireless Channel 7
Channel Width 40
Sensitivity Range 200
Transfer speed : 6.01 MB / s

http://dl.dropbox.com/u/14409260/2.png

3-
Finally I just added:
Wireless Mode n-Only
Transfer speed : 6.40 MB /s
http://dl.dropbox.com/u/14409260/3.png


Are the numbers that I am getting realistic for a N-Wireless router, working on a N-only environment? I did the test using 2 different laptops, both almost new, combining inSSIDer to monitor channel width and power, no issues on that.

Is there a way that someone can provide some tunning/tweaking suggestions to boost the transfer rates?

Thanks in advance for your time.

-ed



3.png
 Description:
Wireless Mode n-Only

6.40 MB /s
 Filesize:  24.42 KB
 Viewed:  6343 Time(s)

3.png



2.png
 Description:
Wireless Channel 7
Channel Width 40
Sensitivity Range 200

6.01 MB / s
 Filesize:  28.43 KB
 Viewed:  6343 Time(s)

2.png



1.png
 Description:
Original Settings +
WPA2 / AES
4.21 MB / s
 Filesize:  31.69 KB
 Viewed:  6343 Time(s)

1.png


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BasCom
DD-WRT Guru


Joined: 29 Jul 2009
Posts: 1335
Location: Germany

PostPosted: Tue Apr 24, 2012 10:52    Post subject: Reply with quote
150 mbit = theoretically, realistic under optimal conditions = 90 mbit. so, your 54 mbit under high data rate is fair enough.
_________________
RT-N66U @ kongac Build 24200M K3.10.40
TL-WR842ND v1 @ BS-build 23919 WDS AP
TL-WR841ND @ BS-build 23919 WDS Client
TL-WR841ND @ BS-build 23919 Client Bridge ( Routed )
Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1187

PostPosted: Tue Apr 24, 2012 15:01    Post subject: Re: E2500 Configuration questions Reply with quote
creddie wrote:
Hi this is my first post, lets see how it goes Wink

Previously I had a Linksys WRT54GL which I had flashed with both TomatoVPN and DD-WRT, so when I bought a new E2500 I was more than willing to flash it with DD-WRT.

Everything went fine and I have it now running v24-sp2 18946M NEWD-2 K2.6 Eko

I have it running in a room next to my living room, where I have a http://www.boxee.tv/.

Here's my question.

I have been streaming a lot of movies (720 & 1020) from a NAS (http://bit.ly/I6Uu97)that I have connected to my router running wires, to my Boxee, but most of the times I got buffering interruptions.

The problem was when I began to check the wireless speed of data transfers between the router and Boxee, which is actually 5 meters away, I saw very slow speeds so I began to debug the speed.

First I began with a 30-30-30 so my tests are reliable, the test is basically transfer a ISO file that I have in a NAS attached to my router, literally 20 cm away from the box, and then stream it into my laptop, all this using N protocol, in order to get the best speeds.

Ideally N protocol should give me around 150Mbps, but I can get anything more than 54Mbps.

1-
Here is the Bandwidth with the factory settings plus my security settings for WPA2 / AES
Transfer speed : 4.21 MB / s

http://dl.dropbox.com/u/14409260/1.png

2-
Here is the prior settings plus
Wireless Channel 7
Channel Width 40
Sensitivity Range 200
Transfer speed : 6.01 MB / s

http://dl.dropbox.com/u/14409260/2.png

3-
Finally I just added:
Wireless Mode n-Only
Transfer speed : 6.40 MB /s
http://dl.dropbox.com/u/14409260/3.png


Are the numbers that I am getting realistic for a N-Wireless router, working on a N-only environment? I did the test using 2 different laptops, both almost new, combining inSSIDer to monitor channel width and power, no issues on that.

Is there a way that someone can provide some tunning/tweaking suggestions to boost the transfer rates?

Thanks in advance for your time.

-ed


A couple things I would try, first enable afterburner in advanced wireless settings... I would move the router off of channel 7, put it on 11, or 9... Also final measure telnet into the router and type

wl -i eth1 interference 2

that will turn on wireless interference mode
on my router it reduces the noise from -79 to -88 and I do get better wifi throughput.

let me know

-Fractal
creddie
DD-WRT Novice


Joined: 23 Apr 2012
Posts: 16

PostPosted: Tue Apr 24, 2012 17:37    Post subject: Reply with quote
Thanks for the suggestions. I'll make them and reply the results. One thing I learnt was the my 6.40 MB /s transfer speed is not so bad, I though it was supposed to be higher, considering I am the only wireless connection in my "all N-network", and the close distance I was using it.

Thanks again Very Happy
creddie
DD-WRT Novice


Joined: 23 Apr 2012
Posts: 16

PostPosted: Wed Apr 25, 2012 5:47    Post subject: Reply with quote
OK I did the tests and the result is kind of strange,the afterburner did not make any improvement, mostly it created a cap in around 2 Mbps, at the end I did not activate it.
So did the channel change, 9 or 11 did not add any boost at least in my network, maybe because other nearby routers are configured near those channels.

Now, the telnet command that you suggested, did got a clear response in the speed, but since the router had to be rebooted from time to time, and the state would be lost, I found this way to continuously execute is inside the command window, I am attaching 2 pictures, one is how I implemented the Command, that will be executed every 10 seconds, and the other screenshot is a little bit strange, the speed i get is much better that before, but the transfer is now sometimes around 60 Mbps, then falls into a zone around 15 Mbps, I replicated it a couple of times, the pattern is like 1 minutes fast, 1 minute slow.

Well I leave it as it is now, any ideas on why this fast / slow pattern? if I could leave it as always fast it would be like 5X faster that when I began this exercise!

Thanks for your time!

-ed



5.png
 Description:
Transfer pattern fast/slow
 Filesize:  22.95 KB
 Viewed:  6234 Time(s)

5.png



4.png
 Description:
Command config
 Filesize:  7.94 KB
 Viewed:  6234 Time(s)

4.png


Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1187

PostPosted: Wed Apr 25, 2012 17:01    Post subject: Reply with quote
I noticed that the router had a huge boost in speed with interference mitigation mode turned on... you can add that simple command to the rc.startup so it stays sticky... I think that wl command running every 5 minutes could slow you down for sec if its reapply the setting in the while loop.

If this works well with testing I can create a firmware where this is sticky all the time

-Fractal
creddie
DD-WRT Novice


Joined: 23 Apr 2012
Posts: 16

PostPosted: Wed Apr 25, 2012 17:41    Post subject: Reply with quote
Thanks for all the help Fractal, one last question, I am not very familiar with modyfing internal files of the router, the only time I had to tweak my router's files was when I had to configure a OpenVPN account that I have with StrongVPN and they offered a video on how to connect to the router with WinSCP, just like it was a FTP repository, and then executing a couple of commands via telnet.

The video is here:
http://bit.ly/IEa5t6

The only place I have seen the full Path to rc.startup in on this website, which mentions it as

http://bit.ly/IEa8VG

/etc/init.d/rc.startup

The question now is, should I follow a similar procedure as connecting to a FTP (using SCP) and then modifying a text file located at /etc/init.d/rc.startup ??


-ed
Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1187

PostPosted: Wed Apr 25, 2012 20:41    Post subject: Reply with quote
creddie wrote:
Thanks for all the help Fractal, one last question, I am not very familiar with modyfing internal files of the router, the only time I had to tweak my router's files was when I had to configure a OpenVPN account that I have with StrongVPN and they offered a video on how to connect to the router with WinSCP, just like it was a FTP repository, and then executing a couple of commands via telnet.

The video is here:
http://bit.ly/IEa5t6

The only place I have seen the full Path to rc.startup in on this website, which mentions it as

http://bit.ly/IEa8VG

/etc/init.d/rc.startup

The question now is, should I follow a similar procedure as connecting to a FTP (using SCP) and then modifying a text file located at /etc/init.d/rc.startup ??


-ed


No problem,

Under Administration and commands subtab, you can put your script then at the bottom click save startup

Once you do that it will save it on boot.
Remember even if you do that if you change wireless settings after it boots up, u will need to enable wireless mitigation mode again.

-Fractal
creddie
DD-WRT Novice


Joined: 23 Apr 2012
Posts: 16

PostPosted: Fri Apr 27, 2012 4:18    Post subject: Reply with quote
Fractal, I did the changes you suggested and everything seems pretty stable now, I am leaving everything as it is so far, thanks a lot. Interference mitigation seemed to work nicely on my scenario.

Thanks again!

-ed
creddie
DD-WRT Novice


Joined: 23 Apr 2012
Posts: 16

PostPosted: Fri Apr 27, 2012 13:17    Post subject: Reply with quote
Here is a picture of the transfers stability


6.png
 Description:
Stable tranfers
 Filesize:  19.55 KB
 Viewed:  6056 Time(s)

6.png


Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1187

PostPosted: Fri Apr 27, 2012 15:30    Post subject: Reply with quote
wow that is impressive almost 50mb/s sustained now that is some throughput!!!

-Fractal
BasCom
DD-WRT Guru


Joined: 29 Jul 2009
Posts: 1335
Location: Germany

PostPosted: Fri Apr 27, 2012 16:46    Post subject: Reply with quote
i cant see the difference between 2.png and 6.png, except some peaks in 1.png.

and we are talking about 50 mbit/s, thats around 6,5 MB/s, Fractal, not 50MB/s. cant see, whats impressive here. Wirless lan is not faster than in post #1.

_________________
RT-N66U @ kongac Build 24200M K3.10.40
TL-WR842ND v1 @ BS-build 23919 WDS AP
TL-WR841ND @ BS-build 23919 WDS Client
TL-WR841ND @ BS-build 23919 Client Bridge ( Routed )
Fractal
DD-WRT Guru


Joined: 19 Apr 2010
Posts: 1187

PostPosted: Fri Apr 27, 2012 16:49    Post subject: Reply with quote
BasCom wrote:
i cant see the difference between 2.png and 6.png, except some peaks in 1.png.

and we are talking about 50 mbit/s, thats around 6,5 MB/s, Fractal, not 50MB/s. cant see, whats impressive here. Wirless lan is not faster than in post #1.


I was refering to pic 6/7 vs 1/2 and looking at the IN/OUT octets.

-Fractal
creddie
DD-WRT Novice


Joined: 23 Apr 2012
Posts: 16

PostPosted: Fri Apr 27, 2012 17:17    Post subject: Reply with quote
BasCom, what I see is stability, I am quite happy now, before it was at least 4X less speed and stability (even before the 1st screen shot), but if you have any suggestion on how to increase this speed, please! chime in, since this is an ALL-N network. I would be more than happy to increase this.

Thanks in advance for your time.

-ed
BasCom
DD-WRT Guru


Joined: 29 Jul 2009
Posts: 1335
Location: Germany

PostPosted: Sat Apr 28, 2012 12:36    Post subject: Reply with quote
no, i have not Smile good for you then. i just wanna make clear, that i cannot see any significant diff. between 2.png and 6.png in mb/s

but the screenshots do not point out stability of your wireless. so maybe i will try the intereference options, too.

_________________
RT-N66U @ kongac Build 24200M K3.10.40
TL-WR842ND v1 @ BS-build 23919 WDS AP
TL-WR841ND @ BS-build 23919 WDS Client
TL-WR841ND @ BS-build 23919 Client Bridge ( Routed )
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