Solved Help me diagnose slow WIRED connection!

[pzinser]

I have a 3mbit download speed from my local ISP (a DSL service). When I'm downloading a file, I usually see speeds of ~300k/sec but as of a few days ago I'm only getting~30k/sec. Called the ISP and they say all is well on their end, it must be a virus or something with my machine.
I ran several scans with different products, which find no problems. I then tried hooking up to another computer I have, but rarely use, and have the SAME slow connections speed, which makes me doubtful it's an issue on my end.

Nevertheless, I followed some instructions for cleaning DNS history, cookies, history, etc. I tried to "rollback" my network adapter driver, but that option was "greyed-out" and unavailable. I then updated my network adapter driver from the manufacturer's website. NO improvement.

When I login into my DSL modem (D-Link 2320), however, it looks as if it "sees" the correct high download/upload speeds that I'm paying for!!

I really don't know what to do/try next?
Any suggestions would be very appreciated.
Thanks.

 

[rap33042]

pzinser:

Go to SpeedGuide.net :: The Broadband Guide

From the Menu Choose: Broadband/Boadband Tools/SG TCP/IP Analyser

This is a great site with a lot of helpful information.

Welcome to SF!

 

[pzinser]

Thanks for your help.
The results are below.
Any suggestions?
Thanks again.
pz



« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.27.2010 18:10
IP address: 67.211.xx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 65700 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16425
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2628kbps (329KBytes/s)
BDP limit (500ms): 1051kbps (131KBytes/s)
MTU Discovery: ON
TTL: 52
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

 

[rap33042]

Thanks for your help.
The results are below.
Any suggestions?
Thanks again.
pz



« SpeedGuide.net TCP Analyzer Results »
Tested on: 11.27.2010 18:10
IP address: 67.211.xx.xxx
Client OS: Windows 7

TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 65700 (multiple of MSS)
RWIN Scaling: 2 bits (2^2=4)
Unscaled RWIN : 16425
Recommended RWINs: 64240, 128480, 256960, 513920, 1027840
BDP limit (200ms): 2628kbps (329KBytes/s)
BDP limit (500ms): 1051kbps (131KBytes/s)
MTU Discovery: ON
TTL: 52
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

From the same site download TCP Optimizer. (be sure to get the latest version)
No installation necessary.
If you have a PPoeP ISP then check that box on the main program page.
Set the Slider to to your ISP's rated download speed.
When you are finished a re-boot will be required to complete the changes.

You can then run the TCP/IP Analyser again to see the difference (if any).
Most likely the TCP Window setting won't be a multiple of MSS, so make a note of it, run the Optimiser again and manually change the TCP Window to one of those suggested based on your latency.

If all this sounds confusing, you'll be able to make better sense of it once you have downloaded the optimizer utility.

 

[Ztruker]

I just looked at SpeedUpMyPC and I don't trust it at all. For instance, this is what it said I should do on my computer:



It doesn't say what services or background tasks. My system is pretty lean already and I run only the services and processes I want. Allowing it to fix these would probably screw up my system seriously.

 

[rap33042]

I just looked at SpeedUpMyPC and I don't trust it at all. For instance, this is what it said I should do on my computer:

View attachment 118317

It doesn't say what services or background tasks. My system is pretty lean already and I run only the services and processes I want. Allowing it to fix these would probably screw up my system seriously.

This is UniBlue- right?
I can't remember why, but the name UniBlue leaves a knot in my stomach...

 

[pzinser]

I've made some changes but not seen any improvement. Is it possible it is SOMETHING on the ISP end, even though they say not?? I've posted some modem diagnostic stuff below that "seems" to indicate it is "seeing" a 6mbit download speed (temporarily bumped up from my usual 3mbit package by the ISP to see if it made a difference, which it does not). Yet ANY computer I connect to the modem only gets d/l speeds of 30-60k.??

Device Info

Board ID: D-1P
Software Version: GE_DSL-2320B_3-06-04-1G00.A2pB021c.d19b
Bootloader (CFE) Version: 1.0.37-6.5

This information reflects the current status of your DSL connection.

Line Rate - Upstream (Kbps): 1360
Line Rate - Downstream (Kbps): 6142
LAN IP Address: 192.168.1.1
Default Gateway:
Primary DNS Server: 192.168.1.1
Secondary DNS Server: 192.168.1.1


br_0_35 Diagnostics

Your modem is capable of testing your DSL connection. The individual tests are listed below. If a test displays a fail status, click "Rerun Diagnostic Tests" at the bottom of this page to make sure the fail status is consistent. If the test continues to fail, click "Help" and follow the troubleshooting procedures.

Test the connection to your local network

Test your ENET Connection: PASS Help
Test your USB Connection: DOWN Help

Test the connection to your DSL service provider
Test ADSL Synchronization: PASS Help
Test ATM OAM F5 segment ping: FAIL Help
Test ATM OAM F5 end-to-end ping: FAIL Help

 

[WindowsStar]

Have you tired completely turning off everything? Router/Modem, switch, computer etc. Then turning things on one at a time starting with the device closest to the internet and then working your way to your computer. Sometimes a complete shutdown will fix things. -WS

 

[pzinser]

Yes, I've tried several times to no avail. I'm thinking it has to be something in the line or on the ISP end, since I get the same result with 3 different computers (trying one at a time) directly to the dsl modem. Are there any tests I can run that would "prove" the problem is on the ISP end??

 

[sygnus21]

Have you checked your download and upload speeds here - Speedtest.net - The Global Broadband Speed Test

This will show what speeds you're getting. I would then have a talk with your ISP provider to see why you're getting less than you're paying for as it does sound like a problem on their end.

My two cents.

 

[WindowsStar]

Try this site: Speedtest.net - The Global Broadband Speed Test

Do a bunch of tests. Start with a site that is close to you and do a test every 5 minutes 3 times. Then use a site that is far from you, do a test every 5 minutes 3 times. Then check your results and see if you are getting the bandwidth you are paying for: Speedtest.net - Results

Please note that you could pick a bad site, so if you get bad results from a site over and over try a different site.

 

[sygnus21]

I see we both think alike as I just posted that site in the post above yours

 

[WindowsStar]

I see we both think alike as I just posted that site in the post above yours

I notice that too!!

 

[Ztruker]

If 3 different computers connected directly to the DSL modem have the same reduced speed then it's an ISP problem. You need to beat on them till they fix it.

Did you use the same Ethernet cable for each test? If so, try a different one.

 

[Jacee]

I had the same problem with my DSL (Broadband) connection and my three computers. It was so bad, that only one computer could be used at a time. I live in the 'boonies' and finally got DSL 3 yrs ago. I was on dial-up for 6 years

Anyway, my ISP said that there were about 400 customers using the same line as me, but they were able to switch me over to a lesser used line ... huh?!! It was showing 4 - 6 kbs, speed picked up to what I'm paying for from there.

Keep calling your ISP!

 

[WindowsStar]

I had the same problem with my DSL (Broadband) connection and my three computers. It was so bad, that only one computer could be used at a time. I live in the 'boonies' and finally got DSL 3 yrs ago. I was on dial-up for 6 years

Anyway, my ISP said that there were about 400 customers using the same line as me, but they were able to switch me over to a lesser used line ... huh?!! It was showing 4 - 6 kbs, speed picked up to what I'm paying for from there.

Keep calling your ISP!

Good info Jacee, thanks for your help.

 

[pzinser]

Turns out it WAS an issue on the ISP end! Please close this thread, and thanks for everyone's help and suggestions.

 

[spyknee]

ADSL PPOE service should have an MTU of 1492 not 1500.

Your dsl modem should have been configured with a disk and your puter upon initial service install.By you or service tech.????
If you are using a router, your modem should be in bridge mode and your router configured for your service.

W7 has many things going for it when it comes to network auto tuning. Getting your home equipment set right is really the only thing you have to do.

 

[spyknee]

I just looked at SpeedUpMyPC and I don't trust it at all. For instance, this is what it said I should do on my computer:

View attachment 118317

It doesn't say what services or background tasks. My system is pretty lean already and I run only the services and processes I want. Allowing it to fix these would probably screw up my system seriously.

IMO, Stay away from 3rd party tweak software, You can make all same changes manually if that important. Manually will force you to learn what your doing and how to return it if bad.

 

[sygnus21]

Turns out it WAS an issue on the ISP end! Please close this thread, and thanks for everyone's help and suggestions.

Happy to hear we were able to help you get it sorted.

Peace