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Date:      Thu, 26 Feb 1998 09:59:41 +1030
From:      Greg Lehey <grog@lemis.com>
To:        John Kelly <jak@cetlink.net>
Cc:        Chris Dillon <cdillon@wolves.k12.mo.us>, Adam Turoff <AdamT@smginc.com>, hackers <hackers@FreeBSD.ORG>, Robert Glover <rob@f-body.org>
Subject:   Re: Token Ring for FreeBSD yet?
Message-ID:  <19980226095941.45367@freebie.lemis.com>
In-Reply-To: <34f4b362.667778@mail.cetlink.net>; from John Kelly on Thu, Feb 26, 1998 at 12:25:04AM %2B0000
References:  <34F37C2A@smginc.com> <Pine.BSF.3.96.980224192042.29916B-100000@duey.hs.wolves.k12.mo.us> <19980225122411.62329@freebie.lemis.com> <34f4b8d8.6646364@mail.cetlink.net> <19980226083615.55804@freebie.lemis.com> <34f4b362.667778@mail.cetlink.net>

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On Thu, 26 February 1998 at  0:25:04 +0000, John Kelly wrote:
> On Thu, 26 Feb 1998 08:36:15 +1030, Greg Lehey <grog@lemis.com> wrote:
>
>>> It doesn't jive at all with test results Tolly published several years
>>> ago in Data Communications.
>>
>> Did he have an axe to grind?
>
> Not that I know of.
>
>>> He said token ring would run at full 16mb wire speed while Ethernet
>>> would degrade to 7mb because of collisions.
>>
>> Right, and none of us have ever seen more than 7 Mb/s out of a 10 Mb
>> Ethernet, right?
>
> You're dodging the collision issue.

Not at all.

> I've seen 10mb between two stations on my BNC Ethernet when nothing
> else is on the wire, but more stations talking will cause throughput
> to fall off.

Sure.  That's the whole point.  Without stating the test conditions,
the figure of 7 Mb/s is meaningless.

>> Any such statement *must* be qualified by the test conditions.
>
> He probably tested it more thoroughly than either one of us have.  

Sre.

> Why not read his report instead of throwing stones?

Did you publish a URL?  In any case, I wasn't so much complaining
about the report as picking an unqualified value from it.

Greg


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