nanog mailing list archives
Re: Thoughts on increasing MTUs on the internet
From: Joe Loiacono <jloiacon () csc com>
Date: Thu, 12 Apr 2007 17:31:01 -0400
I believe the formula applies when the TCP window size is held constant (and maybe as large as is necessary for the bandwidth-delay product). Obviously P going to zero is a problem; there are practical limitations. But bit error rate is usually not zero over long distances. The formula is not mine, it's not new, and there is empirical evidence to support it. Check out the links for more (and better :-) info. Joe owner-nanog () merit edu wrote on 04/12/2007 04:48:09 PM:
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 lossSo 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 () swm pp se
Current thread:
- Re: Thoughts on increasing MTUs on the internet, (continued)
- Re: Thoughts on increasing MTUs on the internet Stephen Sprunk (Apr 13)
- Re: Thoughts on increasing MTUs on the internet Steve Meuse (Apr 13)
- Re: Thoughts on increasing MTUs on the internet Adrian Chadd (Apr 13)
- RE: Thoughts on increasing MTUs on the internet michael.dillon (Apr 13)
- Re: Thoughts on increasing MTUs on the internet Keegan . Holley (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Stephen Wilcox (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Joe Loiacono (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Mikael Abrahamsson (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Joe Loiacono (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Mikael Abrahamsson (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Joe Loiacono (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Stephen Wilcox (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Daniel Senie (Apr 12)
- Re: Thoughts on increasing MTUs on the internet David W. Hankins (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Daniel Senie (Apr 12)
- Re: Thoughts on increasing MTUs on the internet David W. Hankins (Apr 12)
- Re: Thoughts on increasing MTUs on the internet Fred Baker (Apr 13)
- 1500 does not work: Thoughts on increasing MTUs on the internet Peter Dambier (Apr 14)
- Re: 1500 does not work: Thoughts on increasing MTUs on the internet Marshall Eubanks (Apr 14)