https://mcfelix.me/categories/tutorial/ Recent content in Tutorial on Kyle Simpson Hugo en-GB Mon, 04 Dec 2017 15:36:00 +0000 https://mcfelix.me/blog/modifying-ovs/ Mon, 04 Dec 2017 15:36:00 +0000 https://mcfelix.me/blog/modifying-ovs/ <p>For a project I&rsquo;ve been working on (reimplementing some <a href="https://doi.org/10.1016/j.engappai.2015.01.013">past work</a>), being able to easily enable pushback at various points in the network is fairly important. For this, I wanted to try something I&rsquo;d both learn from and be able to use as a springboard for later development and testing &ndash; <a href="http://mininet.org/">mininet</a> (and by extension, <a href="http://openvswitch.org">Open vSwitch</a>) seemed like a good fit. Part of this requires a new feature to be hacked on top of OpenFlow: <strong>probabilistic packet dropping</strong>. I&rsquo;ve written this short walkthrough/tutorial on the process for the benefit of anyone looking to make their own modifications. A full repository is included <a href="https://github.com/FelixMcFelix/ovs/tree/ppd">here</a>.</p> <p><strong>[EDIT 2019-03-27]:</strong> <em>Updated for <a href="https://github.com/openvswitch/ovs/commit/8e738337a2c25c3d6ede2829d6ffd9af6bcd36a5">OVS revision 8e73833</a>.</em></p>