Date: Tue, 24 Feb 1998 21:19:21 -0800 (PST) From: Tom <tom@sdf.com> To: John Kelly <jak@cetlink.net> Cc: Greg Lehey <grog@lemis.com>, 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: <Pine.BSF.3.95q.980224211644.12581H-100000@misery.sdf.com> In-Reply-To: <34f4b8d8.6646364@mail.cetlink.net>
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On Wed, 25 Feb 1998, John Kelly wrote: > On Wed, 25 Feb 1998 12:24:11 +1030, Greg Lehey <grog@lemis.com> wrote: > > >On a normal network, a 10Mbit Ethernet network could outrun a 16Mbit > >Token Ring network, simply because of the token-passing scheme that > >Token Ring uses. > > >token passing isn't very efficient under any kind of load. > > Can you back this up with performance test data? > > It doesn't jive at all with test results Tolly published several years > ago in Data Communications. He said token ring would run at full 16mb > wire speed while Ethernet would degrade to 7mb because of collisions. Yes, it is true. 16mbs token ring is quite fast. Token-passing is a bit of problem with large numbers of stations. Token networks make very efficient use of network bandwidth though. However, any kind of switched ethernet still blows it away. It does away with collision contention, and makes ethernet full duplex. Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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