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  • FlowVisor is a special purpose OpenFlow controller that acts as a transparent proxy between OpenFlow switches and multiple OpenFlow controllers
  • FlowVisor creates rich ''slices'' of network resources and delegates control of each slice to a different controller
    • Slices can be defined by any combination of switch ports (layer 1), src/dst ethernet address or type (layer 2), src/dst IP address or type (layer 3), and src/dst TCP/UDP port or ICMP code/type (layer 4).
  • FlowVisor enforces isolation between each slice, i.e., one slice cannot control another's traffic



  • FlowVisor is currently considered a research project quality and careful testing and consideration should be exercised before deploying in production networks.
  • That said, FlowVisor has been deployed in Stanford's production network since May of 2009.