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Deploying Software Defined Networking

Explore the latest advancements in Software-Defined Networking (SDN) for guaranteed performance, smarter decision-making, and single network control. Learn from real-world deployments, challenges, and best practices for optimizing SDN technologies. Discover SDN deployment models, control points, and network visibility enhancement.

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Deploying Software Defined Networking

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  1. Deploying Software Defined Networking Dale W. Carder Sr. Network Engineer University of Wisconsin dwcarder@wisc.edu

  2. What do we want out of “SDN” Performance (guaranteed?) Smarter decision making Single network control point Visibility Profit

  3. What do we want out of “SDN” What we expect:

  4. What do we want out of “SDN” What we have:

  5. What have we learned? • IPv6 • - incremental deployment failure • - touching deep into applications is a disaster • DNSSEC • Cool, but not cool enough to care • Interdomain routing (BGP) • Network policy per Autonomous System

  6. What have we learned? • InterdomainQoS • I do not actually trust you • Doing it right (shapers) way too expensive • MPLS • Smart edge, dumb middle • Divide & Conquer • Multicast • Holding state • Protocol Soup

  7. The State of SDN OSCARS / DYNES • OK idea, poor implementation • Can perform worse than doing nothing • Out of order packet delivery • Policerscan destroy TCP goodput • Extremely fragile Z. Yan, M. Veeraraghavan, C. Tracy, C. Guok, “On how to provision Quality of Service (QoS) for large dataset transfers,” accepted in CTRQ 2013

  8. The State of SDN • Existing hardware implementations • OpenFlow 1.0 + extensions, 1.3 • Understand optional & other implementation details • SDN Controllers • OpenDaylight • Cisco ONE • FloodLight • NOX, POX, and friends

  9. Open vSwitch

  10. SDN Deployment Models Proactive vs Reactive “Northbound API” - REST Ships in the Night Vlan stitching Overlay tunnels Hybrid (OFPP_NORMAL)

  11. Start playing now • Try out Open vSwitch Included in RHEL 7, (tech preview in rhel 6) • Grab a controller • Pester your vendors

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