Book Image

GNS3 Network Simulation Guide

Book Image

GNS3 Network Simulation Guide

Overview of this book

GNS3 is an open-source Graphical Network Simulator used extensively by networking professionals to simulate networking devices such as Cisco, Juniper and Vyatta routers, along with Virtual PCs. GNS3 Network Simulation Guide gives you all the information you need to run a successful GNS3 simulation. You will be guided through the tricky installation pre-requisites and procedures involved in developing a simulated topology suitable for studying for Cisco CCIE Certification. We will also cover many useful tips and tricks which will help you make the most of your GNS3 simulator application. You will begin the GNS3 journey by ensuring that you have prepared your computer with any additional files required by GNS3, to set up the simulated environment needed for a successful installation process. Once GNS3 is installed, you will get to work creating a successful simulation including routers, Ethernet switches, Virtual PCs, and capture packets using Wireshark. Next, you will learn how to master GNS3's Graphical User Interface as well as the Command Console. The inner workings of GNS3 are described in depth so that you gain an appreciation of how UDP tunnels are used to tie the many components of GNS3 together. By following the clear examples and exercises in this guide, you will learn everything that you need to know about how to use GNS3 to prepare for certifications, as well as simulate real-world network scenarios.
Table of Contents (14 chapters)
GNS3 Network Simulation Guide
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Fine-tuning the topology – adding graphics and text


GNS3 graphical features are limited and the workspace was designed primarily for depicting images of devices and the links between them. However, there are some basic annotation tools on the Annotate menu. These are Add Note, Insert picture, Draw rectangle, and Draw ellipse. However, there are a couple of tricks that are worth knowing about that will give you a little less frustration at the limitation of these simple functions:

  • Rotation of shapes: When you add a shape (not a picture) you can use the <Alt> + p and <Alt> + m or <Alt> + <minus> and <Alt> + <plus> keys to rotate a shape around its original top right-hand corner. In the case of a Text object, you must have your cursor positioned in the text box for this function to work.

    • Alternatively, you can right-click on the object and select Style, and enter a numeric value in the Rotation: field. This is often the easiest way to reset the shape to its...