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Case Studies in Transitioning Routing Protocols.pdf

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CaseStudiesinTransitioningRoutingProtocolsRST-3364RST-336412700_05_2006_x2©2005CiscoSystemsInc.Allrightsreserved.CiscoPublic1TransitioningRoutingProtocols•CutoverAtOnce•SplittingtheProblem•Redistribution•OtherTechniques•SummaryRST-336412700_05_2006_x2©2005CiscoSystemsInc.Allrightsreserved.CiscoPublic2TransitioningRoutingProtocols•ThereisaquickandeasywaytotransitionfromoneprotocolanotherwithoutanynetworkdowntimePerhaps—Ifyoudiscoveritletmeknow•It’simpossibletotransitionfromoneroutingprotocoltoanotherinareallylargenetworkIt’salmostalwaysdifficultbutneverimpossibleRST-336412700_05_2006_x2©2005CiscoSystemsInc.Allrightsreserved.CiscoPublic3TransitioningRoutingProtocols•It’sneverworththetroubleofswitchingroutingprotocolsThatdepends....Wouldthecostbenefitsoutweighthetransitioncosts?DifferentialsinoverallequipmentcostsinthefutureConvergencespeedsonspecificnetworktopologiesOtherfactors....Yousometimesdon’thaveachoicesuchaswhenmergingtwonetworksRST-336412700_05_2006_x2©2005CiscoSystemsInc.Allrightsreserved.CiscoPublic4TransitioningRoutingProtocols•Whatreasonshaveweheardinthefieldforswitchingroutingprotocols?“Wewantfasterconvergence...”Generallyconvergenceisamatterofdesignratherthanprotocol“OurnetworkdesignishubandspokesoitfitsbetterforEIGRP....”Can’targuewiththisone....☺“Wewantastandardsbasedprotocol....”Whatsoyou