# mininet-ovs 1 [Youtube_link](https://www.youtube.com/watch?v=QKXuQtd37jU) * check controller ``` ps aux | grep controller ``` * The help of ovs-ofctl ``` ovs-ofctl -h ``` * kill controller ``` kill -9 ${controller_pid} ``` * show switch ``` ovs-ofctl show ${switch} ``` * check the flows ``` ovs-ofctl dump-flows ${switch} ``` * add flows ``` ovs-ofctl add-flow in_port=${switch_port} actions=output:${switch_port} ``` * delete flows ``` ovs-ofctl del-flow in_port=${switch_port} actions=output:${switch_port} ``` * single,3 ![](https://i.imgur.com/dgZREAv.png) ![](https://i.imgur.com/TF7kAtS.png)