Date: Wed, 3 Feb 1999 10:51:56 -0800 (PST) From: "Eric J. Schwertfeger" <ejs@bfd.com> To: David Greenman <dg@root.com> Cc: FreeBSD Questions <questions@FreeBSD.ORG> Subject: Re: Excessive collisions on Ethernet Message-ID: <Pine.BSF.4.05.9902031046470.2538-100000@harlie.bfd.com> In-Reply-To: <199902031059.CAA01058@implode.root.com>
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> Anything less than 50% collision rate is okay and doesn't reduce the > throughput significantly. All of the numbers below are in the noise. I'd say that depends on the apps. We had a production system running ESix (early S5R4 implementation) that had an application that ran multicast, using 486DX33 CPUs and SMC Elite16 NICs, on a coaxial net. We started seeing severe collisions, well below the 50% rate, that markedly impacted the reliability of the system. We changed over to fully switched 10BaseT (the previous tech director had a rabid fear of 10BaseT) and the reliability problems went away completely. Then again, I hate collisions so much that I run switched 100baseT at home (got a great deal on an 8 port switch :-) It's nice when the harddrive on either end is the bottleneck for local FTPs. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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