Ten Things to Look for In a SDN Controller

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1、TenThingstoLookforinanSDNControllerExecutiveOverthelastsixmonthstherehasbeensignificantgrowthintheinterestthatSummaryITorganizationshaveshowninSoftware-DefinedNetworking(SDN),aswellasinthenumberofSDNrelatedannouncementsthatvendorshavemade.WhilealothasbeenwrittenabouttechnologiessuchastheOpenF

2、lowprotocolthatenableSDN,muchlesshasbeenwrittenaboutSDNcontrollersandwhatdistinguishesonecontrollerfromanother.GiventhatSDNcontrollersareanewclassofproduct,manyITorganizationswillstrugglewhenitcomestoevaluatingthem.InordertoassistITorganizationsinchoosingthemostappropriateproduct,thiswhitepap

3、erdiscussesthekeycriteriathatITorganizationsshouldusewhenevaluatinganSDNcontroller.Themajorityofthecharacteristicsthatarediscussedinthiswhitepaperaretechnical.Someofthesetechnicalcharacteristicswillbefamiliartothereader,astheyapplytomost,ifnotallnetworkelements.Thisincludesscalability,perform

4、ance,security,centralizedmonitoring,visualizationandreliability.However,someofthetechnicalcharacteristicsareSDN-centricandhencewillbenewtomostreaders.ThisincludesOpenFlowsupport,networkvirtualizationandnetworkprogrammability.Inadditiontothetechnicalcharacteristics,thiswhitepaperalsodiscussest

5、heimportanceofITorganizationsevaluatingthevendorsthatprovideSDNcontrollers,andthewhitepapersuggestshowITorganizationscanperformthisevaluation.AttheendofthisdocumentisachecklistofthekeycriteriathatITorganizationscanusewhenevaluatinganSDNcontroller.IntroductionAsissomewhattypicalofemergingtechn

6、ologies,thereisn’tauniversallyagreedtodefinitionofwhatismeantbySoftware-DefinedNetworking(SDN).However,thereisarapidlygrowingconsensusthatanSDNinvolvesthe:●Replacementofthecontrolplaneontheswitchwithaprogrammaticinterface●Migrationofthecontrolplanesoftheswitchestoacontroller●Provisionofprogra

7、mmaticinterfacesintothecontrollerThereisalsoarapidlygrowingconsensusthatanSDNmustfocusnotjustonLayer2andLayer3functionality,butalsoonLayer4throughLayer7functionalityandthatismustsupportbothphysicalandvirtualequipment.2Althoughothertechniquesa