Fast download but slow upload speeds

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warpedbread

19 posts

Geek

#171387 15-Apr-2015 23:19

My laptop has recently experienced really slow upload speeds (~0.15Mbps) since changing to VDSL and getting a new modem. All of the laptops and desktops in my flat have the same problem. They are operating with windows 7,8 and 8.1. My android tablet however is fine and has a normal upload speed of ~10Mbps. When testing the speeds the upload quickly peaks to 5Mbps and then drops to virtually nothing by the end of the test.

I have already reinstalled and updated my wireless network driver, updated the firmware on the modem and have reset the modem. Not too sure what else there is to do.

The upload speed is fine when using ethernet, the problem is only when using wireless.

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19282 posts

Uber Geek
Inactive user

#1285265 16-Apr-2015 06:57

Test over LAN not wifi what is the upload like then and have you tried changing the WiFi channel?

Jase2985

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#1285285 16-Apr-2015 07:38

what modem are you using? how many devices?

pdath

252 posts

Ultimate Geek

#1285332 16-Apr-2015 09:14

If one device has normal speeds then fundamentally it can not be your internet connection.

Compare how the device that works well connects to your network against all those that do not. The difference is where the problem lies.

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warpedbread

19 posts

Geek

#1285398 16-Apr-2015 10:18

I have tried over LAN and the upload speed is fine, the problem is only when using wireless. I will try changing the channel and see if that works.

We are using the D'link DSL 2877AL modem-router. We have around 11 devices connected, but the problem still persists when there is only 1 device connected.

I'm not sure how to check the settings on my tablet, so I can't really compare them well unless there is something specific and I can try googling how to find it. There might be an app that is able to show the different settings?

I feel as though the problem is to do with the different operating systems, comparing android to windows. I'm just no t sure how to isolate the problem further and fix it.

Jase2985

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#1285421 16-Apr-2015 10:42

i have windows vista, 7 and 8.1, along with mac OS, ipad, iphone and android phones and tablest all connected to my network with out any issues.

the issue with be with your router

have you tried powering it off and seeing if its any better?

what about a factory reset, then set all the setting back up?

warpedbread

19 posts

Geek

#1285439 16-Apr-2015 10:56

Yea I've tried both of those to no success :(

warpedbread

19 posts

Geek

#1286541 17-Apr-2015 20:25

Jase2985: i have windows vista, 7 and 8.1, along with mac OS, ipad, iphone and android phones and tablest all connected to my network with out any issues.

the issue with be with your router

have you tried powering it off and seeing if its any better?

what about a factory reset, then set all the setting back up?

Are you using the same modem (DSL-2877AL)?

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hio77

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Lizard Networks

#1286545 17-Apr-2015 20:42

on the note of the tablet, you do need to consider the fact that the testing method is slightly different on the app compared to the desktop Flash application, this can often causes faster than expected results.

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richms

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#1286546 17-Apr-2015 20:44

Change the router to a 20Mhz wireless channel. The tablet probably only does 20 and you are competing with a video sender or something that is not cooperative to wifi.

Richard rich.ms

yitz

2074 posts

Uber Geek

#1286548 17-Apr-2015 20:45

Launch the 'Manual Wireless Connection Setup' then under Wireless Basic settings, disable WMM.

Disabling WMM also disables IP QoS-related config which can cause slow uploads on Wi-Fi.

pdath

252 posts

Ultimate Geek

#1286550 17-Apr-2015 20:50

warpedbread: I have tried over LAN and the upload speed is fine, the problem is only when using wireless. I will try changing the channel and see if that works....

Have you tried a different channel yet?

If you are using 2.4Ghz, 1, 6 and 11 are the most popular channels to use (as they are non-overlapping).

Also note if you are using 2.4Ghz that if you have just one 802.11b client in the vicinity it will affect the performance of everything in the same channel. Sometimes you can mitigate this by disabling all the historic rates (so disable 1, 2, 5.5 and 11 Mb/s data rates). I tend to disable all the older rates as a matter of course.

Try my latest project, a Cisco type 5 enable secret password cracker written in javascript!

warpedbread

19 posts

Geek

#1290584 24-Apr-2015 09:17

I changed the channel width to 20MHz and the channel to channel 8. These settings didn't make any difference to the upload speed. I also disabled WMM which reduced both the upload speed and download speed to around 30% of the original, with the upload speed still falling to zero. Any other thoughts? Thanks to those who have replied.

Aredwood

3885 posts

Uber Geek

#1291333 25-Apr-2015 16:05

Does your router support channel 13? As it made a big difference to speed for me. Only problem some devices don't support it.

warpedbread

19 posts

Geek

#1291540 25-Apr-2015 22:16

I tried channel 13 but it didn't seem to make any difference, I changed it back to channel 8 incase some devices weren't able to connect to it. I did a speed test and recorded t to show what I mean by the spike in upload speed. https://www.dropbox.com/s/xf3xdxmx18hukov/Untitled%20102.avi?dl=0

webwat

2036 posts

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#1291578 26-Apr-2015 00:26

Try channel 1, 6 or 11 as they are non-overlapping. Check whether anything else at your place could be interfering in the 2.4Ghz range eg wireless phones.

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