doi10.3969/j.issn.1002-0802.2014.02.001121.917461022062.610041、、。、、SDNSDN。A1002-0802201402-0123-05TechnologiesandFutureDevelopmentTrendofSoftware-DefinedNetworkingLIJi-zhou1HEEn21.Unit91746ofPLABeijing102206China2.No.30InstituteofCETCChengduSichuan610041ChinaAbstractSDNSoftware-DefinedNetworkingwhichiscalledanewnetworkingrevolutionandhasgreatinfluenceonthenextgenerationoftheInternetisahottopicaftercloudcomputingmobileinternetbigdataintheareaofinformationandcommunication.Thispaperfirstlyintroducesthebackgroundprin-ciplearchitectureandconnotationofSDNthenelaboratesonitskeytechnologiesfinallyanalyzesitsad-vantagesandshortcomingsaswellasapplicationarea.KeywordsSDNSoftware-DefinedNetworkingkeytechnologydevelopmenttrend0。SDNSoftware-definedNetworkingAPI。1SDN2006NSF7CleanSlateInternet、1。CleanSlateEthaneFlow。EthaneSDN。20084EthaneOpenFlow《OpenFlowEnablingInnovationinCam-pusNetworks》OpenFlow2。2009TechnologyReviewMITOpenFlow“SDN”OpenFlowSDN。TechnologyReviewSDN。SDN。20101GoogleOpenFlow。4BigSwitchOpenFlow。20113ONF·321·47220142CommunicationsTechnologyVol.47No.2Feb.2014SDN/OpenFlow。ONFIT。201110ONFOpenFlowOpenNetworkingSummit。2012SDN。、、ExtremeSDNVMware12.6SDN、Nicira。2012GoogleSDN30%~40%100%。20128SIGCOMMHotSDNWorkshop2013SDNSIGCOMM。、Openflow/SDN、、、、。ONFOpenFlow。20121ONFOpenFlowOF-CONFIG1.0&1.1。20124ONFOpenFlow1.3。SDN。2013OpenFlow1.4OpenFlow-hybridHybridSDNSDN。OpenFlowSDN。ONFOpenFlowSDN。ONFIETF、ITU、ETSISDN。2SDN、“SDN”3SDNSDNONFOpenFlow。SDN1。2、SDNOpenflowSDNOpenflowSNMP、Netconf、XMPP。3API。ONFSDN1。、4。1SDNFig.1SDNinfrastructure。Table、。NOS、。。API。。、。/、QoS。API。API、·421·.txjszz.com2014、、、、、、、。SDNAPPAPI/OpenFlow。Open-Flow、OpenFlow。OpenFlowflowtable。。OpenFlowOpenFlowflowtable。。。SDNOpenFlow。SDNSDN。。3SDNONFSDNOpenFlow33.1NOSNOS。。3.2SDNSDNOpenFlowflowtable。3.3OpenFlowOpenFlowSDN。flowtableOpen-FlowOpenFlow、。ONFOpenFlowOF-ConfigOpenFlowOpen-FlowOF-Config、。OpenFlow1OpenFlowPort。OpenFlowSwitch3abSwitchtunnelcOpenFlow。ALL、CONTROLLER、TA-BLE、IN_PORT、ANY、LOCAL、NORMALFLOOD8。2OpenFlow。OpenFlow。3OpenFlow。Open-FlowSwitchController、。Controller/Switch、Asynchronous、Sym-metric。4OpenFlow。3.4SDNNOS。APP、、。。·521·4724SDNSDN、。SDN51。2、。。3SDN。。4SDN。SDN5SDNSDNNOSQoS。6SDN。SDN。、。7。SDN。SDNQoS。SDN。1SDNSDN。2SDNNOSNOS、NOS、。3SDNOpenFlow。4SDN。SDN。。。5SDN、、、、。6SDN“”。5SDNSDN、、、SDN2。5.1OpenFlowSDNOpenFlow·621·.txjszz.com2014。30OpenFlowSDN。5.2“”、、。。。OpenFlowSDN、、。GoogleB4SDN。5.3SDN、、。5.4SDN。SDNSDN。SDN。NECVLAN、OpenflowWIFI、VLAN。5.5gatewayrouter、。SDNOpenFlowOpen-FlowSDN。6SDN、、、。SDN2009SDNOpenflow、。1.SDNJ.201208112-114.GUOChun-mei.ResearchonTechnologyandSecurityofSoftware-DefinedNetworkingJ.NetinfoSecurity201208112-114.2.OpenFlowSDNJ.201324051078-1097.ZUOQing-yun.ResearchonOpenFlow-BasedSDNTechnologiesJ.JournalofSoftware201324051078-1097.3.SDNJ.2013031-3.LIULu.ResearchandThinkingofSoftwareDefinitionNetworkJ.ChinaInternet2013031-3.4.J.201330082246-2251.ZHANGShun-miao.SurveyonSoftwareDefinedNet-workResearchJ.ApplicationResearchofComputers201330082246-2251.5.SDN、J.20132909102-107.ZHENGYi.CharacteristicsDevelopmentandFutureofSDNJ.TelecommunicationsScience20132909102-107.1967—LIJi-zhou1967-maleseniorengi-neermainlyengagedintheresearchofinforma-tionsecurityandcommunicationstechnology.1980—。HEEn1980-maleM.Sci.seniorengineermajoringininformationsecurity.·721·472