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CS 490.31: Software Defined Networks 2nd Lecture 20/3/2013

CS 490.31: Software Defined Networks 2nd Lecture 20/3/2013. Xenofontas Dimitropoulos ETH Zurich. Classical network architecture. Distributed control plane Distributed routing protocols: OSPF, IS-IS, BGP, etc. Operating System. Specialized Packet Forwarding Hardware. Feature. Feature.

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CS 490.31: Software Defined Networks 2nd Lecture 20/3/2013

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  1. CS 490.31: Software Defined Networks2nd Lecture20/3/2013 XenofontasDimitropoulos ETH Zurich

  2. Classical network architecture • Distributed control plane • Distributed routing protocols: OSPF, IS-IS, BGP, etc. Operating System Specialized Packet Forwarding Hardware Feature Feature Feature Feature Feature Feature Feature Feature Feature Feature Operating System Specialized Packet Forwarding Hardware Operating System Specialized Packet Forwarding Hardware Operating System Specialized Packet Forwarding Hardware Operating System Specialized Packet Forwarding Hardware

  3. From Vertically Integrated to … Feature Feature Network OS Operating System Specialized Packet Forwarding Hardware Operating System Feature Feature Feature Feature Feature Feature Feature Feature Feature Feature Specialized Packet Forwarding Hardware Operating System Specialized Packet Forwarding Hardware Operating System Specialized Packet Forwarding Hardware Operating System Specialized Packet Forwarding Hardware

  4. Constructs a logical mapof the network Well-defined open API Software Defined Network Feature Feature Network OS Open vendor agnostic protocol OpenFlow Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware Simple Packet Forwarding Hardware

  5. Network OS Network OS: distributed system that creates a consistent, up-to-date network view • Runs on servers (controllers) in the network Uses an open protocol to: • Get state information from forwarding elements • Give control directives to forwarding elements

  6. OpenFlow • OpenFlow • is a protocol for remotely controlling the forwarding table of a switch or router • is one element of SDN

  7. The SDN Stack Monitoring/debugging tools oftrace oflops openseer ENVI (GUI) LAVI … Applications n-Casting NOX Beacon … Trema Maestro Controller Slicing Software FlowVisor Console FlowVisor Commercial Switches Software Ref. Switch NetFPGA Broadcom Ref. Switch HP, NEC, Pronto, Juniper.. and many more OpenFlow Switches Open vSwitch OpenWRT PCEngineWiFi AP 7

  8. Switches(all OpenFlow 1.0 for now)

  9. Current SDN hardware (as of ~2010) Juniper MX-series NEC IP8800 WiMax (NEC) HP Procurve 5400 Netgear 7324 PC Engines Pronto 3240/3290 Ciena Coredirector 9

  10. Commercial Switches

  11. Controllers

  12. Open Controllers

  13. Open Controllers (2) Too many to easily list of keep track of…

  14. [Hands-on Tutorial]http://www.openflow.org/wk/index.php/OpenFlow_Tutorial

  15. TutorialFlow Today’s Hands-On Session Part 5 of OpenFlow Tutorial: http://www.openflow.org/wk/index.php/OpenFlow_Tutorial

  16. Tutorial Setup Controller port6633 c0 loopback (127.0.0.1:6633) OpenFlow Tutorial 3hosts-1switch topology loopback (127.0.0.1:6634) OpenFlow Switch dpctl (user space process) s1 s1-eth0 s1-eth1 s1-eth2 h1-eth0 h3-eth0 h4-eth0 h1 10.0.0.2 h2 10.0.0.3 h3 10.0.0.4 virtual hosts

  17. This talk wouldn’t be possible without: • Past slides from: • Brandon Heller • Nick McKeown

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