breaking up services documentation into documentation files related to service groups

docs/services/sdn.md

@@ -0,0 +1,30 @@
+# Software Defined Networking
+
+* Table of Contents
+{:toc}
+
+## Overview
+
+Ryu is a component-based software defined networking framework. Ryu provides software components with well defined API that make it easy for developers to create new network management and control applications. Ryu supports various protocols for managing network devices, such as OpenFlow, Netconf, OF-config, etc. About OpenFlow, Ryu supports fully 1.0, 1.2, 1.3, 1.4, 1.5 and Nicira Extensions. All of the code is freely available under the Apache 2.0 license.
+
+## Installation
+
+### Prerequisites
+
+```shell
+sudo apt-get install gcc python-dev libffi-dev libssl-dev libxml2-dev libxslt1-dev zlib1g-dev
+```
+
+### Ryu Package Install
+
+```shell
+pip install ryu
+```
+
+### Ryu Source Install
+
+```shell
+git clone git://github.com/osrg/ryu.git
+cd ryu
+pip install .
+```