Thoughts on increasing MTUs on the internet

Mikael Abrahamsson swmike at swm.pp.se
Thu Apr 12 20:48:09 UTC 2007


On Thu, 12 Apr 2007, Joe Loiacono wrote:

> Window size is of course critical, but it turns out that MTU also impacts
> rates (as much as 33%, see below):
>
>        MSS      0.7
> Rate = ----- * -------
>        RTT    (P)**0.5
>
> MSS = Maximum Segment Size
> RTT = Round Trip Time
> P   = packet loss

So am I to understand that with 0 packetloss I get infinite rate? And TCP 
window size doesn't affect the rate?

I am quite confused by this statement. Yes, under congestion larger MSS is 
better, but without congestion I don't see where it would differ apart 
from the interrupt load I mentioned earlier?

-- 
Mikael Abrahamsson    email: swmike at swm.pp.se



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