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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<title>ZeroSDN | Distributed SDN Controller</title>
<!-- Bootstrap Core CSS -->
<link href="css/bootstrap.min.css" rel="stylesheet">
<!-- Custom CSS -->
<link href="css/landing-page.css" rel="stylesheet">
<!-- Custom Fonts -->
<link href="font-awesome/css/font-awesome.min.css" rel="stylesheet"
type="text/css">
<link
href="http://fonts.googleapis.com/css?family=Lato:300,400,700,300italic,400italic,700italic"
rel="stylesheet" type="text/css">
<!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
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<![endif]-->
</head>
<body>
<!-- Navigation -->
<nav class="navbar navbar-default navbar-fixed-top topnav"
role="navigation">
<div class="container topnav">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse"
data-target="#bs-example-navbar-collapse-1">
<span class="sr-only">Toggle navigation</span> <span
class="icon-bar"></span> <span class="icon-bar"></span> <span
class="icon-bar"></span>
</button>
<a class="navbar-brand topnav" href="#"><img src="img/zsdn.png"
style="max-height: 100%;"></img></a>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse"
id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav navbar-right">
</ul>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container -->
</nav>
<!-- Header -->
<!-- /.intro-header -->
<!-- Page Content -->
<a name="controller"></a>
<div class="content-section-b">
<div class="container">
<div class="row">
<div class="col-lg-12">
<div class="clearfix"></div>
<h1>
<a id="What_is_ZeroSDN__0"></a>What is ZeroSDN ?
</h1>
<p class="lead">
Zero Software Defined Networking(ZSDN) is a distributed SDN
controller. It consists of multiple independent modules that are
connected by a messaging middleware, ZMQ (see <a
href="http://zeromq.org">http://zeromq.org</a>). Currently
ZeroSDN supports OpenFlow versions 1.0 und 1.3.
</p>
<p class="lead">
ZeroSDN was developed by 13 students during a software engineering
project at the Distributed Systems department (see <a
href="https://www.ipvs.uni-stuttgart.de/abteilungen/vs?__locale=en">https://www.ipvs.uni-stuttgart.de/abteilungen/vs?__locale=en</a>)
at the University of Stuttgart, Germany.
</p>
<p class="lead">
<h3 class="section-heading">
Resources:
</h3>
<ul class="list-inline intro-social-buttons">
<li><a href="https://github.com/zeroSDN"
class="btn btn-default btn-lg"><i class="fa fa-github fa-fw"></i>
<span class="network-name">Github</span></a></li>
<li><a href="https://github.com/zeroSDN/ZSDN-Controller/wiki"
class="btn btn-default btn-lg"><i class="fa fa-github fa-fw"></i>
<span class="network-name">Wiki</span></a></li>
<li><a href="https://github.com/zeroSDN/zeroSDN.github.io/raw/master/media/ZSDN-FactSheet.pdf"
class="btn btn-default btn-lg"><i></i>
<span class="network-name">Download Fact Sheet</span></a></li>
</ul>
</p>
</br>
<h2 class="section-heading">
<a id="Overview_6"></a>Overview
</h2>
<p class="lead">
<img src="http://alki.square7.de/zsdn/MessageBus_modules.png"
alt="Overview" height="100%" width="100%">
</p>
</br>
</br>
<h1>
<a id="Why_yet_another_SDNController_10"></a>Why yet another
SDN-Controller?
</h1>
<p class="lead">
We felt that many controllers are either <em>too monolithic</em>,
<em>too hard to understand</em>, or <em>not scalable enough</em>.
</p>
<p class="lead">This is why we created a controller which does not have these limitations.</p>
</br>
<h3>
<a id="Is_highly_modularized_16"></a>Highly modularized, distributed design
</h3>
<p class="lead">Rather than using a monolithic design, ZeroSDN encapsulates controller functions into modules communicating through the ZeroMQ high-perfomance messaging library. These modules can run on a single host or can be distributed between several hosts. Modules can also be added to or removed from a running controller easily.</p>
</br>
<h3>
<a id="Can_run_on_any_hardware_20"></a>Lightweight
</h3>
<p class="lead">ZeroSDN can run on hosts spanning a large performance range including a simple Raspberry Pi, cloud servers, or even on a switch itself.</p>
</br>
<h3>
<a id="Is_language_independent_24"></a>Language independent
</h3>
<p class="lead">Out of the box, ZeroSDN supports modules implemented in Java or C++. However, since ZeroSDN utilizes ZeroMQ as messaging library <em>(which supports many more languages!)</em> support for other languages can be added to ZeroSDN easily.</p>
</br>
<h3>
<a id="Can_be_easily_understood_and_extended_28"></a>Extensive documentation
</h3>
<p class="lead">We made sure to <a
href="https://github.com/zeroSDN/ZSDN-Controller/wiki">document</a> all functionality thoroughly to facilitate the usage and extension of ZeroSDN.</p>
</br>
<h3>
<a id="Avoids_unecessary_eventdelivery_32"></a>Flexible Event Filtering
</h3>
<p class="lead">ZeroSDN uses the publish/subscribe paradigm to filter events. We designed a hierarchical pub/sub schema making it easy for modules to receive just the events that are relevant for the module. Thanks to ZeroMQ, events can be filtered at high speed. Here is a simplified example for Packet-In messages from switches:</br></br><em>A module subscribed to IPv4 packets will not receive ARP packets, but will receive both UDP and TCP packets.</em></p>
</br>
<h3>
<a id="Performs_very_well_37"></a>High performance
</h3>
<p class="lead">The distributed design of ZeroSDN based on the high-performance messaging library ZeroMQ helps it to scale well with the number of hosts:</p>
</br>
<p class="lead">
<img height="100%" width="100%" src="http://alki.square7.de/zsdn/throughput_4_node.png"
alt="ZeroSDN StartUpSelector initial screen"> <em>Tested
using Cbench. 16 Switches, throughput mode</em>
</p>
</br>
<h2 class="section-heading">
<a id="How_to_installuse_ZeroSDN_44"></a>How to install/use
ZeroSDN?
</h2>
<p class="lead">
It’s easy, take a look at <a
href="https://github.com/zeroSDN/ZSDN-Controller/wiki">https://github.com/zeroSDN/ZSDN-Controller/wiki</a>
for more information.
</p>
</br>
<h1>
<a id="Support_48"></a>Support
</h1>
<p class="lead">
If you need help, don’t hesitate to contact us: <a
href="mailto:[email protected]">[email protected]</a>
</p>
</br>
<h1>
<a id="Participate_53"></a>Participate
</h1>
<p class="lead">ZeroSDN is an open source project. You have own ideas or
plans concerning ZSDN or found bugs? Share them with us.</p>
<p class="lead">
You can create pull requests at <a
href="https://github.com/zeroSDN/ZSDN-Controller/pulls">https://github.com/zeroSDN/ZSDN-Controller/pulls</a>
or contact us at <a href="https://github.com/zeroSDN">https://github.com/zeroSDN</a>
</p>
<p class="lead">We are looking forward to your participation!</p>
</br>
<h1>
<a id="Licence_61"></a>Licence
</h1>
<p class="lead">
ZeroSDN is licenced under the Apache License Version 2.0.
</p>
</div>
</div>
</div>
<!-- /.container -->
</div>
<!-- /.content-section-a -->
<!-- Footer -->
<footer>
<div class="container">
<div class="row">
<div class="col-lg-12">
<ul class="list-inline">
<li><a href="#">Home</a></li>
</ul>
<p class="copyright text-muted small">Copyright © zeroSDN
team 2015. All Rights Reserved</p>
</div>
</div>
</div>
</footer>
<!-- jQuery -->
<script src="js/jquery.js"></script>
<!-- Bootstrap Core JavaScript -->
<script src="js/bootstrap.min.js"></script>
</body>
</html>