Ixia Black Book: SDN/OpenFlow

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Test Case: OpenFlow Switch Setup and Functional Test Test Case: OpenFlow Switch Setup and Functional Test Overview One of the most important aspects of OpenFlow protocol is to create OF Channel. OF Channel establishes connection between the controller and switch using TCP or TLS. After the TCP session is established, controller and switch exchanges an OFPT_Hello message. The version field in the message is set to the highest OpenFlow protocol version supported by the sender. After receiving the message, the recipient calculates the OpenFlow protocol version to be used. The lowest version that is sent and received successfully is used as the OpenFlow protocol version. After version negotiation, the controller sends Features Request message and switch sends Features Reply message to advertise their capabilities. Then Echo Request and Echo Reply messages are exchanged to keep the OF Channel session alive between the controller and the switch. Ladder diagram The following diagram illustrates the message exchange between the switch and the controller. Figure 1: Message Exchange between Switch and Controller PN 915-2635-01 Rev A December 2012 7
Test Case: OpenFlow Switch Setup and Functional Test Objective The OpenFlow Switch Setup and Functional test verifies the functionality of OpenFlow switches. The test provides basic guidelines on how to configure OpenFlow controller, establish OF Channel, and retrieve switch capabilities using learned information. The test also trigger stat request using on demand message function and verifies that switch sends reply with requested information. At the end of the test, statistics are reviewed. Setup The following figure illustrates the test setup. Figure 2: Test Setup – OpenFlow Switch Setup and Functional Test, test setup PN 915-2635-01 Rev A December 2012 8
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Ixia Black Book: SDN/OpenFlow

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