September 28th, 2004, 18:49 PM
Want to change MTU
I have XP Pro and my MTU is set at 1420 but my connection can support up to 1500. Does anyone know how to change the MTU? I tried a few registry edit steps from off the web but no luck so far. Thanks.
September 28th, 2004, 18:56 PM
September 28th, 2004, 23:25 PM
What kind of internet connection do you have?
September 29th, 2004, 03:57 AM
That is what is so weird. I tried both of those ways and it didn't change anything. Has anyone actually got those instructions to work? I have tried them many times.
I *should* have a 1500/128 cable connection. But it runs like crap. I usually range from 300-800 kbps down (the upload is normal).
September 29th, 2004, 04:39 AM
how have you tested it? try www.dslreports.com
September 29th, 2004, 10:47 AM
I suggest you try CableNut, or TCP Optimizer.
Those programs will set your MTU and make further tweaks.
September 29th, 2004, 19:04 PM
I tested it and it said it was 1420. I got the TCPOptimizer and I changed it to 1500, but the site still said it was 1420. So I figure some piece of equipment between me and the internet is keeping my packets at 1420. I am on a college campus so not much I can do about it. As a side note, when I ran the tweaking program to optimize my settings it caused me to start dropping packets (15%+ loss) and this was only between me and a router. So maybe they just got old equipment here. Thanks for your help.
September 29th, 2004, 19:25 PM
stop the press...are you on a uni lan network. or a residential cable isp?
September 29th, 2004, 21:26 PM
there should be a DWORD named MTU, this should have a hexadecimal value equivalent to 1500 (5dc).
if no MTU, create a DWORD Value with a hexadecimal value 5dc (1500)
in getting the hexadecimal value of certain numbers like 1500 use the calculator of windows.
hope this helps
September 30th, 2004, 00:32 AM
September 30th, 2004, 05:01 AM
The idea of MTU is to make your MTU for your local NIC the same as the closest connection... ie if your router uses 1492 you make yours the same, even though your ISP may use 1500 to connect to another ISP etc
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