Help me diagnose slow WIRED connection!

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.

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)

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

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??

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.