‎Internet speed | DELL Technologies

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jimrvaughan

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22 years ago

jimrvaughan

5 Posts

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9369

May 20th, 2004 21:00

Internet speed

I have a Cable modem the speed 4000/512; that's 4000 down and 512 up.

On my Windows 2000 server machine I get around 3600/500; not the full speed but close enough.

On my Dell 8600 (Windows XP pro) I get 1600/500.

Both are connected via the same router.

My question of course is why the difference.

Things I have tried:

(1) Connect Dell 8600 direct to cable modem (no router); still get 1600/500

(2) Use PC-Card NIC in the Dell 8600 (as opposed to built in NIC); still get 1600/500

(3) Access ftp site on Windows 2000 server box from Dell 8600 (no internet access); runs at 100M.

What the heck is wrong? Any ideas anyone?

J
jimrvaughan
5 Posts
147
0
Posted May 20th, 2004 22:00
What else have I tried:

(1) Updated the Broadcom drivers to 4.23

(2) Booted in safe mode with network access

..and, you guessed, both the above still gave me 1600/500

Any ideas anyone?
M
mattcowger
2582 Posts
147
0
Posted May 20th, 2004 22:00
Sounds like it might be an MTU issue....try setting your MTU to 1500 manually, or 1472 if that doesn't help.
J
jimrvaughan
5 Posts
147
0
Posted May 20th, 2004 23:00
Either way under XP if I understand things correctly the registry setting for EnablePMTUDiscovery (set to 1 on my machine) should automatically adjust the setting for MTU.
J
jimrvaughan
5 Posts
147
0
Posted May 20th, 2004 23:00
ping www.dslreports.com -f -l 1500

Packet needs to be fragmented etc...

This was the first to give a normal ping

ping www.dslreports.com -f -l 1472

So using Dr TCP I set MTU to 1472 and re-booted.

Final result, you guessed, 1600/500.
J
jimrvaughan
5 Posts
147
0
Posted May 21st, 2004 00:00
Just for fun I tried setting MTU to 1472 on my linksys router.

The Windows 2003 server (I got it wrong earlier it's not 2000) still runs at 3600/500. Dynamic MTU discovery in action.

The XP box is still stuck at 1600/500.

Argh....