speed guide interesting site

stepper said:
thanx, great find...it helped me a lot :)
Click to expand...
Thanks - would MTU be the same setting as MRU?

How much of a difference does optimizing the MTU make? :confused:
 
not alot, mtu is the maximum transmission unit, so if you were sending a file your computer will split it into packets right and those packets will be the size of whatever the MTU is set at, now the thing is if the MTU is too high for a piece of network hardware (router, network card etc) it will get broken apart... fragmented which abviously slows stuff down, but on iBurst our "optimal" packet size is way lower than anything that will fragment, infact on most broadband services we would need to raise our MTU quite a bit to take full advantage.

So the short answer is, nothing you will notice.
 
if a set MTU was required by the iBurst technology then it would set the MTU on installation
 
slimothy said:
if a set MTU was required by the iBurst technology then it would set the MTU on installation
Click to expand...

With MTU default 1500 I can't even download mail of a couple of kilobytes, setting it to 1392 and eveything is fine.
 
as I said before, if your mTU is too high with any connection packets get broken up meaning your pc has to find the missing bits the server never got and resend. the default MTU is 1400 on windows so you changing it to 1392 means that your packets are 8 bytes smaller which basically means you have infact made it less efficient, of course the difference is hardly noticable but measurable none the less. Here's the thing though, socket libs in .NET (the base fucntions that programmers use in thier apps) ussually figure out the max transmission unit themselves before even opening a connection, of course this won't apply to all apps, but alot more than you'd think, so you're figuring out your MTU because you're told to even though the default 1400 is fine and wasting time cuz you think its gonna supe up your connection but meanwhile your apps are figuring out thier own MTU.
 
In the abscence of an MTU registry value the default for NT4 & W2KP (except maybe XP onwards) is 1500.
 
I didn't explain when I said default of 1500, I didn't have ANY MTU set, so the default should have been used or the optimum detected. Whatever... I couldn't download mail, so I set it to some value (1392 have been mentioned in the past), and it started working, and download speeds are still fine for me. I'll try to optimize it later (perhaps :) )
 
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