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The Graveyard - Products No Longer Supported => Routers / COVR => DIR-600 => Topic started by: manabk on October 18, 2013, 11:50:39 PM

Title: 802.11n and WMM
Post by: manabk on October 18, 2013, 11:50:39 PM

Hi! I'm on a 100mbps connection, with a Rev. B1/B2 and a TL-ANT2408CL (8dBi) antenna. I've recently purchased a new laptop and I've noticed some weird things happening. When in the same room with the router, in 802.11n mode, I get around 30mbps download on Speedtest.net. If I move further away (2 rooms), in spite of "Good" signal, the download speed test starts after a couple of seconds' delay, and I rarely get more than 5-10mbps on download, coupled with connection drops; my upload speed stays the same (20-25mbps)! Task Manager indicates a link speed of 39-58mbps, rarely 72mbps (instead of 150, the router's maximum). I'm on channel 11, which is clear of interference (I get 100 link speed in inSSIDer). I've read topic on other forums that blame WMM, so I disabled it, switching to g mode. This gives me download speeds of around 18-20mbps (with a 54mbps Link Speed). I have tried FW2.16, 2.17 and 2.05 and the latest dd-wrt with no results. On wired I get 95/75 speeds (with the 2.05 version; later ones cap it off at 50mbps).

I'm on PPPoE, QoS off, in Europe, Time is correct, WPS off, MTU is 1492, WPA2-PSK with AES. I get about the same results on an Android phone and on the same laptop using a USB WiFi adapter.

Title: Re: 802.11n and WMM
Post by: FurryNutz on October 21, 2013, 07:44:35 AM

What is the distances between your laptop and the antenna 2 rooms away...

There will always be some degradation of speed and signal as you move farther away...

Title: Re: 802.11n and WMM
Post by: manabk on October 21, 2013, 11:00:25 AM

A few metres, under 10. I'd say about 5-6. But this (with WMM on) amounts to a 95%+ decrease! If I turn it off the loss is "just" 90%. It's surely abnormal.

Title: Re: 802.11n and WMM
Post by: FurryNutz on October 21, 2013, 11:14:13 AM

Any other WiFi routers in the area? Link> Use InSSIDer (http://www.metageek.net/) to find out. How many?

Ya, WMM should be enabled and provide the best WiFi operation...

Title: Re: 802.11n and WMM
Post by: manabk on October 21, 2013, 11:36:29 AM

Quote from: manabk on October 18, 2013, 11:50:39 PM

I'm on channel 11, which is clear of interference (I get 100 link speed in inSSIDer).

There are 2-3 (one comes and goes) networks, nothing close to my channel.

Title: Re: 802.11n and WMM
Post by: FurryNutz on October 21, 2013, 11:39:37 AM

Ok, you may need to contact your regional D-Link support office and ask about this...seems like there is an issue here with this router...

Let us know how it goes...

Title: Re: 802.11n and WMM
Post by: manabk on October 21, 2013, 11:46:33 AM

They aren't as communicative on the D-Link Romania forums. No replies yet. The router is way past its warranty period, so I'm not sure what could be done. Thanks, anyway!

Title: Re: 802.11n and WMM
Post by: FurryNutz on October 21, 2013, 11:53:00 AM

Ok, well, try the phone support if you can. Maybe you just need to get into a newer model router or AP.

Good Luck.