funsec mailing list archives
Re: Router speeds...
From: Chris Buechler <funsec () chrisbuechler com>
Date: Mon, 28 Nov 2005 13:41:54 -0500
Valdis.Kletnieks () vt edu wrote:
On Sat, 26 Nov 2005 01:22:26 EST, Chris Buechler said:Since wired is slow as well, I would guess it's the number one problem you typically run into with wired performance issues - a duplex mismatch.Hmm.. I'm not sure. Usually, those manifest as *really* bad throughput (100mbit pipe, and 40-50kb/sec - those TCP retransmits *really* kill you).
nah, you can easily get 1 Mb through a 100 Mb connection with a duplex mismatch, and probably 1 Mb through a 10 Mb duplex mismatch. I've seen too many networks setup by well-intentioned but clueless people, where they start forcing speed and duplex all over the place (it's a performance tweak!! </sarcasm> I won't get on my soap box :) but only on one side or the other, and end up with bunches of mismatches. I've seen a file server in a situation where duplex was mismatched at 100 Mb, and performance got horrible once it got up to about 10 Mb throughput (it had been operating for a couple years that way without anyone complaining until the load increased).
-Chris _______________________________________________ Fun and Misc security discussion for OT posts. https://linuxbox.org/cgi-bin/mailman/listinfo/funsec Note: funsec is a public and open mailing list.
Current thread:
- Re: Router speeds..., (continued)
- Re: Router speeds... Dude VanWinkle (Nov 25)
- Re: Router speeds... Rob, grandpa of Ryan, Trevor, Devon & Hannah (Nov 25)
- Re: Router speeds... Dude VanWinkle (Nov 25)
- Re: Router speeds... Nick FitzGerald (Nov 25)
- Re: Router speeds... Dude VanWinkle (Nov 25)
- Re: Router speeds... Dr. Neal Krawetz (Nov 26)
- Re: Router speeds... Chris Buechler (Nov 28)
- Re: Router speeds... Chris Buechler (Nov 25)
- Re: Router speeds... Roland Dobbins (Nov 25)
- Re: Router speeds... Valdis . Kletnieks (Nov 25)
- Re: Router speeds... Chris Buechler (Nov 28)
- Re: Router speeds... Rob, grandpa of Ryan, Trevor, Devon & Hannah (Nov 25)
- Re[2]: Router speeds... Ilfak Guilfanov (Nov 25)
- Re: Router speeds... Dr. Neal Krawetz (Nov 26)
- Re: Router speeds... Martin Wehlou (Nov 26)
- Routers Rob, grandpa of Ryan, Trevor, Devon & Hannah (Nov 27)
- Re: Routers Martin Wehlou (Nov 27)
- Re: Routers Dr. Neal Krawetz (Nov 27)
- Re: Routers Blue Boar (Nov 27)
- Re: Routers Martin Wehlou (Nov 27)
- Re: Routers James Eaton-Lee (Nov 27)