Python Pox class library actual combat case sharing

Python Pox class library is a Python library written for OpenFlow exchange technology.It provides a convenient way to write a network controller to manage and control the OpenFlow switch.In this article, we will share some practical cases that use the Python Pox class library, including complete programming code and related configuration descriptions. 1. Install Python Pox class library To use the Python Pox class library, you need to install it first.Run the following commands in the terminal or command prompt to install the Python Pox class library: pip install pox 2. Write a simple network controller code We will start with a simple network controller code. The code uses the Python Pox class library to control the OpenFlow switch.The following is an example: python from pox.core import core from pox.lib.util import dpid_to_str from pox.openflow import NEATSwitch log = core.getLogger() class MyController(object): def __init__(self, connection): self.connection = connection connection.addListeners(self) def _handle_ConnectionUp(self, event): log.info("Switch %s has come up.", dpid_to_str(event.dpid)) def launch(): NEATSwitch(Controller=MyController) In the above code, we first introduced the required modules and classes.We then created a class called MyController to achieve our own network control logic.In this class, we define a _handle_connectionup method to call this method when the OpenFlow switch is established. Finally, in the Launch function, we use the NEATSWITCH class to create a switch object, and pass the MyController class as parameters to Neitswitch to connect it with the switching mechanism. 3. Configure OpenFlow switch Before using the Python Pox class library, you need to ensure that the OpenFlow switch has been correctly configured to communicate with the network controller.To configure the OpenFlow switch, you need to edit the configuration file of the switch and connect it to the network controller.The following is an example configuration file: yaml [pox] openflow.of_01.listen_port = 6653 [components] neat_openflow1_0.openflow._listen_port = 6633 neat_openflow1_0.openflow._listen_host = 0.0.0.0 In the configuration file above, we specify the width of the network controller monitoring and the listening port of the OpenFlow switch.These port number can be configured according to the actual situation. 4. Run network controller After you complete the configuration of the Python code and the OpenFlow switch, you can run the network controller.Under the terminal or command prompt, navigate to the directory of the storage network controller code and run the following command: pox.py mycontroller In the above commands, MyController is the name of the network controller you defined in the code.After running this command, the network controller will begin to monitor the connection from the OpenFlow switch. Through the above steps, you can use the Python Pox class library to create a custom network controller and use it to manage and control the OpenFlow switch.You can modify the network controller code according to actual needs to achieve more complex functions and logic. Please note that the code and configuration provided in this article are only examples. The actual situation may vary from the network environment and demand.It is recommended that you learn more about the documents and functions in detail before using the Python Pox class library.