Date: Fri, 25 Feb 2000 13:40:09 -0800 (PST) From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> To: wollman@khavrinen.lcs.mit.edu (Garrett Wollman) Cc: cwasser@v-wave.com (Chris Wasser), freebsd-current@FreeBSD.ORG Subject: Re: dc0 wierdness with Compex Freedomline Message-ID: <200002252140.NAA71447@gndrsh.dnsmgr.net> In-Reply-To: <200002251921.OAA31520@khavrinen.lcs.mit.edu> from Garrett Wollman at "Feb 25, 2000 02:21:15 pm"
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> <<On Fri, 25 Feb 2000 11:08:24 -0800 (PST), "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> said: > > >> The maximum for full-duplex is utterly irrelevant, since the bounds on > >> performance for half-duplex Ethernet networks come from CSMA/CD. > > > I will say it one last time, duplex falls out of the equations when you > > solve for ``maximal''. > > Nonsense. Either stop saying that or put up the formula's like I did that show that duplex enters into the L2 maximal data rate. > > It has 0 meaning in the numbers used. Go read > > my analysis and tell me why I can't pump 12MB/sec on 100BaseTX, > > By no means -- you certainly can do that, if you have only one station > sending at a time. Of course, a monologue is by definition not useful > communication. You have a very twisted definition of communication. > > You keep throwing P(coll) in, P(coll) only occurs if your upper layer is > > causing P(coll) by doing things like ack packets. > > I'd certainly like to see a demonstration of your network using ESP > for reliability. Have you ever calculated the BER of a controlled CSMA/CD network? It is something like 10^-9. I could show you 4 working implementations of this, but I would have to call the boys in grey coats afterwards. -- Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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