Subscribing to Port Events

When writing controller applications, it is often useful to determine when a port status changes. For example, when a port’s physical link is removed, flows and internal tables may need to be modified as part of a network layout learning algorithm. Thankfully,...

Ryu Quickstart with Simple Switch for OF-DPA

One of the largest hurdles with getting started with OF-DPA is finding everything you need just to get an example OF-DPA pipeline application running. Once an example is working, it becomes much easier to experiment. This tutorial will cover setting up your Ryu...

Using Postman to Probe Ryu REST API

Postman is a tool that we use extensively to access the Ryu REST API (ryu.app.ofctl_rest). It has been an indispensable component of our development tool chain. Postman, a Chrome-based application (either as a Chrome App or a standalone application),  is a web browser...