By Jason C. Neumann
GNS3 is open resource software program that emulates Cisco router and turn to simulate advanced networks. you should use GNS3 on any desktop to test with a variety of router configurations, examine for that subsequent gigantic Cisco certification, or construct the ubernetwork of your wildest dreams—all with out plugging in one actual community cable.
The booklet of GNS3 will educate you the way to harness the robust GNS3 software program to create your personal digital networks with Cisco and Juniper units. Hands-on tutorials all through convey you the way to:
Configure Cisco IOS and ASA units in GNS3
Add Juniper routers in your tasks with VirtualBox and QEMU
Connect GNS3’s hub, swap, and cloud units to actual hardware
Integrate Cisco IOU digital machines for complicated switching features
Simulate a Cisco entry server to perform coping with devices
Build higher labs through dispensing venture assets throughout a number of computers
Why organize all of that dear actual earlier than you recognize even if it's going to all interact? methods to construct digital networks with The publication of GNS3, and prevent reconfiguring your lab at any time when you must attempt whatever new.
About the Author
Jason C. Neumann is an energetic player within the GNS3 undertaking, offering code, moderating boards, and beta trying out the software program on a number of structures. Neumann is usually a community engineer with greater than two decades of expertise, and holds a number of certifications from Cisco, Juniper, Microsoft, Novell, and VMware. he's the writer of Cisco Routers for the Small company (Apress).
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Extra resources for The Book of GNS3
Example text
Creating Your First Project Now that you know your way around the GNS3 interface, let’s dig into some project management details. I’ll cover the easiest way to get things done, but keep in mind that GNS3 often provides more than one way to do things. Creating and Managing Projects 37 When you launch GNS3, a New project window appears, as shown in Figure 4-8. From here, you can either open an existing project or create a new one. Figure 4-8: New project window To create a new project, replace untitled with your project name, and click OK.
To change a port, click the port number and modify the settings as needed. When you’re done, click Apply and OK. To add a new port, define the port settings and click the Add button; then click Apply. When you’re finished adding ports, click OK to complete the setup. One alternative to the Ethernet switch node is to configure a Dynamips router with a network switch module. The advantage of using a switch module is that it supports more features (such as the Spanning Tree Protocol); the downside is that using a network switch module uses more PC resources.
20 Chapter 3 Lastly, if you work for a large company that happens to be a Cisco partner, you should be able to log on to the Cisco website using your partner credentials and get any IOS image you desire. Be aware that this sort of activity could be grounds for marching you to the corporate gallows, so get permission before using your company account. However you obtain an IOS image, you can use only image files that are designed for router models supported by GNS3, and some IOS versions for a given model may work better than others.