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Software Defined Network (SDN ) and Network Virtualization

Software Defined Network (SDN ) and Network Virtualization. A/Professor Vijay Sivaraman School of Electrical Eng. & Telecoms. University of New South Wales http://www2.ee.unsw.edu.au/~vijay/. I nternet Growth. Aggregate traffic composition (*). ( * ) North America, Fixed Access.

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Software Defined Network (SDN ) and Network Virtualization

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  1. Software Defined Network (SDN) and Network Virtualization A/Professor Vijay Sivaraman School of Electrical Eng. & Telecoms. University of New South Wales http://www2.ee.unsw.edu.au/~vijay/

  2. Internet Growth

  3. Aggregate traffic composition (*) (*) North America, Fixed Access

  4. Global Shares of YouTube and Real-Time Entertainment In North-America’s fixed access network, Netflix is dominant

  5. Fixed Network Traffic Projection – U.S.

  6. Cost/Revenue for Service Providers Source: Cisco Visual Networking Index Global Forecast, 2011 Source: Infonetics, Worldwide Service Provider Update, September 2010

  7. Imbalance in Revenue and Costs • Internet Service Provider (ISP): • Increasing the cost of the infrastructure to carry the growing traffic volume • Revenues are relatively flat • No per-stream revenues • Content Provider (CP): • Large growth in revenue • Frustrated by unpredictable delivery quality due to bottlenecks in the network • No visibility into network

  8. Proposed Solution • Rethink of business model: • Collaboration / partnership between ISP and CP • ISP exposes quality control mechanism to CP • Dynamic provisioning • CP pays ISP proportional to volume and quality • Dynamic pricing • Revenue shared between ISP and CP

  9. Technology Tool? • Software Defined Networking (SDN) • Disruptive technology • Centralised control • Global view of the network • Enables: • Openness: exposure to external parties • Network virtualization • Dynamic resource partitioning (and charging)

  10. Software Defined Networks (SDN) Today’s networking SDN based networking Separate hardware (data plane) from software (control plane) Open API (OpenFlow) Simpler Centralised control Decreased cycle from Lab to Production Commodity hardware and Open-Source software • Hardware, Operating System, and Applications Built Into a “Box” • Closed equipment • Complicated Distributed control • Delays on introducing new feature by vendor • High CapEx/OpEx

  11. Analogy: Computing App App App App App App App App App App App Specialized Applications Windows (OS) Linux Mac OS Specialized Operating System or or Open Interface Open Interface Specialized Hardware Microprocessor Horizontal Open interfaces Rapid innovation Huge industry Vertically integrated Closed, proprietary Slow innovation Small industry

  12. Evolution of Routing/Switching App App App App App App App App App App App Specialized Features Control Plane Control Plane Control Plane or or Specialized Control Plane Open Interface Open Interface Specialized Hardware Merchant Switching Chips Horizontal Open interfaces Rapid innovation Vertically integrated Closed, proprietary Slow innovation

  13. SDN: an industry change • How SDN will shape networking: • Empower network operators • Better visibility and control over network • Increase pace of innovation • Can introduce new ideas with software changes • Diversity of supply chain • Commodity switching elements

  14. Use-case1: SDN at Google • Google: 6.4% of all Internet traffic • [ATLAS 2010 Traffic Report, Arbor Networks] • Google has two large backbone networks: • Internet-facing backbone (user traffic): I-Scale • Smooth / diurnal • Datacenter backbone (internal traffic): G-Scale • Bursty / bulk • Google WAN intensive applications: • YouTube; Maps; Web Search • Google+; Photos • Android and Chrome updates; AppEngine

  15. Google’s SDN WAN • Centralised TE: • Higher efficiency with global visibility • Deterministic behaviour • Supports Innovation and more robust SW development

  16. Use-case2: Access Network Virtualization

  17. Conclusions • Today’s business model is unsustainable • Software Defined Networking (SDN) • disruptive technology • Simplifies management by centralising control • Enables innovation via software • Allows creation of new business models • Increasing adoption by • Equipment vendors (Cisco, HP, etc.) • Data centres (VMWare) • Content provider backbone networks (Google) • Internet Service Providers • Now is the time to think about how SDN impacts your network architecture

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