Abstract Faster Network Design with Scenario Pre-filtering

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1、FasterNetworkDesignwithScenarioPre-filteringDebojyotiDutta,AshishGoel,JohnHeidemann
ddutta@isi.edu,agoel@usc.edu,johnh@isi.eduInformationSciencesInstituteSchoolofEngineeringUniversityofSouthernCalifornia4676AdmiraltyWayMarinaDelRey,CA90292(ISI-Technical-Report-550)November15,2001Abstract1In

2、troductionDesignandengineeringofnetworksrequirestheconsid-Thedesignandengineeringofnetworksisachallengingerationofmanypossibleconfigurations(differentnetworktask.Interactionsbetweentrafficload,topologies,andpro-topologies,bandwidths,trafficandpolicies).Networken-tocolscreateahugeparameterspace

3、thatmustbeunder-gineersmayusenetworksimulationtoevaluatechangesstood.Networksimulationcanplayanimportantroleininnetworkconfiguration,butdetailed,packet-levelsimu-thisunderstandingandinthedesignofbetternetworks.Forlationofmanyalternativeswouldbeextremelytimecon-example,considerasimplelinkhavi

4、ngavariablenumbersuming.Thispaperintroducestheconceptofscenariopre-ofFTPconnectionsgoingthroughit.Anetworkengineerfiltering—ratherthanperformdetailedsimulationofeachmightwanttofindthepointwhenthecapacityofacer-scenario,weproposetoquicklyevaluate(pre-filter)allsce-tainlinkwouldbeinsufficienttome

5、etcertaingoals.Ornariosinordertoselectonlytherelevantscenariosanddis-shemightwanttoobtainthemaximumnumberofbulkcardthosethatareclearlytooover-orunder-provisioned.connectionsthatcanbesupportedbyaparticularnetworkTorapidlyevaluatescenarios,wehavedevelopedseveraltopology.Toexplorethenetworkbeh

6、avior,theengineernewanalyticaltechniquestoquicklydeterminethesteady-mightemployanetworksimulatortoevaluateanumberofstatebehaviorofthenetworkwithbothbulkandshorttermscenarioswithdifferenttrafficcharacteristics.TCPflows.ThesetechniquesapplytoarbitrarytopologiesPacketlevelsimulators,suchasns-2[2

7、5],arediscreteandroutersthatusebothdrop-tailandREDqueuingpoli-eventdrivenandtheirgranularityisasinglepacket.Theycies.Sinceweareonlyinterestedinselectingtheinter-arewidelyusedtounderstandnetworkandnetworkpro-estingscenariosfordetailedsimulation,theanswers