Cannot get Wireless-N speeds, What am I doing wrong?

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kenhen93
DD-WRT Novice


Joined: 05 Oct 2009
Posts: 3

PostPosted: Mon Oct 05, 2009 14:44    Post subject: Cannot get Wireless-N speeds, What am I doing wrong? Reply with quote
Hi,

I am not exactly a newbie to this, as I have flashed my Linksys WRT310N probably about 10 times with different versions of Eko's firmware, but the recent builds I cannot seem to get wireless N speeds. In the status page it never shows over 54mbps. I know my laptop is wireless N and i also have desktop machines they never seem to connect at N speed and I have gotten both of these wireless NICs to run at N speeds. I am currently running

DD-WRT v24-sp2 (09/01/09) std
(SVN revision 12774M NEWD Eko)

Wireless Mode AP
Wireless Network Mode Mixed
Wireless Channel Auto
Channel Width Auto
Wireless SSID Broadcast Enabled

I have changed my TX Power to 28.

Any ideas? Are my setting correct or should I try changing something? Thanks for any help.
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Murrkf
DD-WRT Guru


Joined: 22 Sep 2008
Posts: 12675

PostPosted: Mon Oct 05, 2009 16:11    Post subject: Reply with quote
Try setting your wireless type to N only.
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evox2008
DD-WRT User


Joined: 01 May 2007
Posts: 79

PostPosted: Mon Oct 05, 2009 18:01    Post subject: Reply with quote
Try Channel 6
Width - 40mhz (lower)


Make sure you enable WMM and disable Afterburner and Frame Burst.

Good Luck.
phuzi0n
DD-WRT Guru


Joined: 10 Oct 2006
Posts: 10141

PostPosted: Mon Oct 05, 2009 23:00    Post subject: Reply with quote
What are your encryption settings? It needs to be either open or WPA2-AES if you want to guarantee N rates. The N spec doesn't allow weak encryption such as WEP or WPA1 so compliant cards will drop down to G rates when using weak encryption.
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kenhen93
DD-WRT Novice


Joined: 05 Oct 2009
Posts: 3

PostPosted: Wed Oct 07, 2009 0:43    Post subject: Reply with quote
I have tried to set it just to wireless N but that still does not work. Maybe it is my encryption settings. I am using WPA personal. I will try to change this too.
Masterman
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Joined: 24 Aug 2009
Posts: 2070
Location: South Florida

PostPosted: Wed Oct 07, 2009 1:05    Post subject: Reply with quote
Do all of your wireless clients have N capable NICs? If not, DD-WRT will automatically downclock to G-speeds (or B speeds for that matter)
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kenhen93
DD-WRT Novice


Joined: 05 Oct 2009
Posts: 3

PostPosted: Wed Oct 07, 2009 14:01    Post subject: Reply with quote
Yes they are all Wireless N NICs! Surprised
My laptop uses Intel(R) WiFi Link 5300 AGN, while my desktop is using a Linksys WMP300n w/ an External Roswell Antenna.


OK, so after changing encryption to WPA2-PSK AES, I am getting wireless N speeds SOMETIMES (Which is better than never). The speeds sometimes though get down to just a couple Mbps but my signal strength is excellent. Are there any other setting that might stablize to N connection? I have switched back to Mixed mode. Do you think I would get more consistency with straight N mode?

(I forgot to mention that I use MAC filtering, only allowing MACs I enter to connect to the router, but I doubt this would have anything to do with N connectivity.)

Thanks for any help.
Masterman
DD-WRT Guru


Joined: 24 Aug 2009
Posts: 2070
Location: South Florida

PostPosted: Wed Oct 07, 2009 16:25    Post subject: Reply with quote
Do you have alot of wireless broadcasts in your area? Go to Status->Wireless and click "Site Survey" Note the channels that are being received by your router and change it to one that isn't being broadcasted in your area. Also, set channel width to 40MHz and reboot the router..
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givehimagun
DD-WRT Novice


Joined: 09 Oct 2009
Posts: 8

PostPosted: Fri Oct 09, 2009 2:17    Post subject: Reply with quote
I have the exact same problem with my setup. I just upgraded to Eko 12774 NEWD-2 to try and resolve my problem but no luck.

I have a WRT310N and a Intel Wifilink 5100 AGN. I've connected to N routers before but mine seems to not want to let me. When I go into N only mode I can't connect at all.

The area I live is in definitely congested (I can see 20-25 routers in the area but only 3-4 are N routers).

I've tried messing with the channels and frequencies to no avail. In my computer's site survey it identifies my router as an N router but only connects at 54 mbps on a G channel.

Any help would be appreciated.
givehimagun
DD-WRT Novice


Joined: 09 Oct 2009
Posts: 8

PostPosted: Fri Oct 09, 2009 2:26    Post subject: Reply with quote
I spoke too soon....it works now.

Here are my settings if they help:
Wireless Network Mode Mixed
Channel 4 (was the least populated for my area)
Channel Width 40 Mhz
Wide Channel Upper
Wireless Security WPA2 AEP (TKIP+AES didn't work for me)
Frame Burst Disabled
Afterburner Disabled
Transmit Power 28

My actual transfer speeds between my wireless laptop and wired desktop seem to be rather slow though...around the 1 MB/s mark. If I wire in, it goes 10-20 MB/s on the gigabit lan. Not sure about that one.
Hope this helps someone else.


givehimagun wrote:
I have the exact same problem with my setup. I just upgraded to Eko 12774 NEWD-2 to try and resolve my problem but no luck.

I have a WRT310N and a Intel Wifilink 5100 AGN. I've connected to N routers before but mine seems to not want to let me. When I go into N only mode I can't connect at all.

The area I live is in definitely congested (I can see 20-25 routers in the area but only 3-4 are N routers).

I've tried messing with the channels and frequencies to no avail. In my computer's site survey it identifies my router as an N router but only connects at 54 mbps on a G channel.

Any help would be appreciated.
Masterman
DD-WRT Guru


Joined: 24 Aug 2009
Posts: 2070
Location: South Florida

PostPosted: Fri Oct 09, 2009 7:04    Post subject: Reply with quote
Would be nice if you could add that to the wiki..! Great troubleshooting Cool
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givehimagun
DD-WRT Novice


Joined: 09 Oct 2009
Posts: 8

PostPosted: Sun Oct 11, 2009 19:28    Post subject: Reply with quote
Masterman wrote:
Would be nice if you could add that to the wiki..! Great troubleshooting Cool


Help me out, I don't see what section I could add it to.

Any ideas about the actual download speeding being so slow?
Masterman
DD-WRT Guru


Joined: 24 Aug 2009
Posts: 2070
Location: South Florida

PostPosted: Sun Oct 11, 2009 21:13    Post subject: Reply with quote
I made an entry for ya...Please add/modify it anyone!

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

givehimagun wrote:

Any ideas about the actual download speeding being so slow?



When you go to status -> wireless in the Web interface, what is the Rate showing up as?

Here is an example of mine:



Wireless.png
 Description:
 Filesize:  8.29 KB
 Viewed:  44276 Time(s)

Wireless.png



_________________
Optware, the Right Way
Asus RT-AC68U
Asus RT-N66U
Asus RT-N10
Asus RT-N12
Asus RT-N16 x5
Asus WL520gU
Engenious ECB350
Linksys WRT600Nv1.1
Linksys WRT610Nv1
Linksys E2000
Netgear WNDR3300
SonicWall NSA220W
SonicWall TZ215W
SonicWall TZ205W
SonicWall TZ105W
givehimagun
DD-WRT Novice


Joined: 09 Oct 2009
Posts: 8

PostPosted: Thu Oct 22, 2009 21:21    Post subject: speeds Reply with quote
Great start to the wiki! Thanks for that.

It looks like my speeds don't stay stable for very long. It will go from 270 to 100 in a matter of seconds and back up again. My actual throughput is around 2-3 MB/s



2009-10-22_161919.png
 Description:
 Filesize:  9.04 KB
 Viewed:  44059 Time(s)

2009-10-22_161919.png


RCShadows
DD-WRT User


Joined: 17 Aug 2008
Posts: 437

PostPosted: Thu Oct 22, 2009 23:27    Post subject: Reply with quote
I have a 310 and get solid 216-270mbps.

What I found was, I played with my xmit power till I found what was optimal for my environment. I am sure you will have to do the same.

It took quite a bit of time for me to do this but using inSSIDer helped too. I actually went from 70mw to 250mw watching inSSIDer while doing so. I usually went in increments of 2mw-5mw. This took several hours scattered over weeks until I found what was good for me.

You will find the "sweet spot". It just takes some time to do so.
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