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1、21885BearCreekWayLosGatosCA95030(408)395-5700FAX(408)395-1955NetworksandCommunicationsConsultingInternet:seifert@netcom.comTechnicalReportTheEffectofEthernetBehavioronNetworksusingHigh-PerformanceWorkstationsandServersCopyrightNoticeThisreportiscopyrighted.Itmaybedistributedfornon-commerci
2、aluseinpaperorelectronicformwithoutcharge,providing:(1)Anysuchreproductioncontaintheentirereportandnotbeexcerpted,and(2)Thiscopyrightnotice,andthecopyrightnoticesoneachpagenotberemoved.Thereportmaynotbesoldorusedforcommercialpurposes,withoutpriorwrittenconsentofNetworksandCommunicationsCon
3、sulting.Requestsforquantityreprintsorcommercialusepermitsshouldbedirectedto:RichSeifertNetworksandCommunicationsConsulting21885BearCreekWayLosGatos,CA95030(408)395-5700(408)395-1966faxseifert@netcom.comAuthor:RichSeifertMarch3,1995TheEffectofEthernetBehavioronNetworksusingHigh-PerformanceW
4、orkstationsandServers1.IntroductionOverthepast15years,Ethernethasbeenbecomethemostwidely-usedtechnologyforinterconnectingworkstations,servers,andothercomputerequipmentinlocalareanetworks.Formostofitslife,thecapacityofEthernet(10Mb/s)farexceededthedata-movingcapabilityoftheattachedequipment
5、ortheapplicationsusingthenetwork.Throughputwastypicallylimitedbycontrollerimplementations,driverandprotocolsoftware,orhostandapplicationperformance.Morerecently,theemergenceofhigh-performanceEthernetimplementations,aswellashigh-performancehosts(bothworkstationsandservers)havechangedthissit
6、uation.Incertainenvironments,theperformanceoftheEthernetitselfmaybecomethelimitingfactorinuserthroughput.Inaddition,thesehigh-performanceenvironmentscanuncoversomesideeffectsofthefundamentalEthernetdesignthatwerepreviouslyunobservedwithlighterloadsandslowerimplementations.Thispaper:❑Identi
7、fiescertainobservableidiosyncraticbehaviorsofhigh-performancenetworkedsystems,❑ShowshowthesebehaviorscanbeaccountedforbythefundamentalEthernetdesign,❑Correctssomewidely-heldmisconceptionsaboutEthernetbehavior,and❑Offerssomepotentialsolutionstotheproblems.1.1.P