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Describe the purpose of two types of OpenFlow messages (of your choosing) that are sent from a controlled device to the controller. Describe the purpose of two types of Openflow messages (of your choosing) that are send from the controller to a controlled device

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Answer and explanation:

Purpose of two types of OpenFlow messages sent from a controlled device to the controller:

  • Flow-removed: these type of messages are used in order to notify the controller about flow table entry removal.
  • Port-status: these type of messages are used in order to notify the controller about status changes of the port.
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