1. NOX: Towards an Operating System for Networks Author: Natasha Gude, Teemu Koponen, Justin Pettit, Ben Pfaff, Martín Casado, Nick McKeown and Scott Shenker Publisher: SIGCOMM Computer Communication Review, 2008 Presenter: Yu Hao, Tseng Date: 2013/05/15

2. Outline Introduction NOX Overview Programmatic Interface Example Application

3. Introduction What we clearly need is an operating system for networks, one that would provide a uniform and centralized programmatic interface to the entire network. A network operating system would not manage the network itself; it would merely provide a programmatic interface. Applications implemented on top of the network operating system would perform the actual management tasks.

4. NOX Overview

5. Programmatic Interface NOX’s programmatic interface is conceptually quite simple, revolving around : Events

6. Programmatic Interface (Cont.) NOX’s programmatic interface is conceptually quite simple, revolving around : Network View and Namespace

7. Programmatic Interface (Cont.) NOX’s programmatic interface is conceptually quite simple, revolving around : Events Network View and Namespace Control Higher-Level Services Interface and Runtime Limitations

8. Example Application Switch application ~/nox/src/coreapps/switch

9. Example Application

10. Example Application (Cont.)