INFOCOM09-Talk

Software Defined Network (SDN) and Network VirtualizationA/Professor Vijay SivaramanSchool of Electrical Eng. & Telecoms.University of New South Waleshttp://www2.ee.unsw.edu.au/~vijay/

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Internet Growth

Aggregate traffic composition (*)

(*) North America, Fixed Access

Global Shares of YouTube and Real-Time Entertainment

In North-Americas fixed access network, Netflix is dominant

Fixed Network Traffic Projection U.S.

Cost/Revenue for Service Providers Source: Cisco Visual Networking Index Global Forecast, 2011Source: Infonetics, Worldwide Service Provider Update, September 2010 Imbalance in Revenue and CostsInternet Service Provider (ISP):Increasing the cost of the infrastructure to carry the growing traffic volumeRevenues are relatively flat No per-stream revenuesContent Provider (CP):Large growth in revenueFrustrated by unpredictable delivery quality due to bottlenecks in the networkNo visibility into networkProposed SolutionRethink of business model:Collaboration / partnership between ISP and CPISP exposes quality control mechanism to CPDynamic provisioningCP pays ISP proportional to volume and qualityDynamic pricingRevenue shared between ISP and CP

Technology Tool?Software Defined Networking (SDN)Disruptive technologyCentralised controlGlobal view of the networkEnables:Openness: exposure to external partiesNetwork virtualizationDynamic resource partitioning (and charging)

Software Defined Networks (SDN)Todays networkingHardware, Operating System, and Applications Built Into a BoxClosed equipmentComplicated Distributed controlDelays on introducing new feature by vendorHigh CapEx/OpExSDN based networkingSeparate hardware (data plane) from software (control plane)Open API (OpenFlow)Simpler Centralised controlDecreased cycle from Lab to ProductionCommodity hardware and Open-Source software

Vertically integratedClosed, proprietarySlow innovationSmall industry

SpecializedOperatingSystemSpecializedHardwareAppAppAppAppAppAppAppAppAppAppAppSpecializedApplicationsHorizontalOpen interfacesRapid innovationHuge industryMicroprocessor

Open InterfaceLinuxMacOSWindows(OS)ororOpen InterfaceAnalogy: Computing11Vertically integratedClosed, proprietarySlow innovationAppAppAppAppAppAppAppAppAppAppAppHorizontalOpen interfacesRapid innovationControlPlaneControlPlaneControlPlaneororOpen Interface

SpecializedControlPlaneSpecializedHardwareSpecializedFeaturesMerchantSwitching ChipsOpen Interface

Evolution of Routing/Switching12SDN: an industry changeHow SDN will shape networking:Empower network operatorsBetter visibility and control over networkIncrease pace of innovationCan introduce new ideas with software changesDiversity of supply chainCommodity switching elements

Use-case1: SDN at GoogleGoogle: 6.4% of all Internet traffic[ATLAS 2010 Traffic Report, Arbor Networks]Google has two large backbone networks:Internet-facing backbone (user traffic): I-ScaleSmooth / diurnalDatacenter backbone (internal traffic): G-ScaleBursty / bulkGoogle WAN intensive applications:YouTube; Maps; Web SearchGoogle+; PhotosAndroid and Chrome updates; AppEngine

Googles SDN WAN

Centralised TE:Higher efficiency with global visibilityDeterministic behaviourSupports Innovation and more robust SW development

Use-case2: Access Network Virtualization

ConclusionsTodays business model is unsustainableSoftware Defined Networking (SDN)disruptive technologySimplifies management by centralising controlEnables innovation via softwareAllows creation of new business modelsIncreasing adoption byEquipment vendors (Cisco, HP, etc.)Data centres (VMWare)Content provider backbone networks (Google)Internet Service ProvidersNow is the time to think about how SDN impacts your network architecture17