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Date:      Fri, 25 Feb 2000 14:21:15 -0500 (EST)
From:      Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
To:        "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>
Cc:        wollman@khavrinen.lcs.mit.edu (Garrett Wollman), cwasser@v-wave.com (Chris Wasser), freebsd-current@FreeBSD.ORG
Subject:   Re: dc0 wierdness with Compex Freedomline
Message-ID:  <200002251921.OAA31520@khavrinen.lcs.mit.edu>
In-Reply-To: <200002251908.LAA71093@gndrsh.dnsmgr.net>
References:  <200002251833.NAA31071@khavrinen.lcs.mit.edu> <200002251908.LAA71093@gndrsh.dnsmgr.net>

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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.


> 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 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.

-GAWollman

--
Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
wollman@lcs.mit.edu  | O Siem / The fires of freedom 
Opinions not those of| Dance in the burning flame
MIT, LCS, CRS, or NSA|                     - Susan Aglukark and Chad Irschick


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