As you know, GNS3 is a graphical network simulator program that you can easily run devices such as Cisco Switch, Router, Firewall, or virtual machine.
How to Set Up GNS3 2.2 (2.2.18) on Windows 10
With GNS3 software, you can improve yourself by making network designs and become a system and network expert. Since this network simulator has been developed in accordance with the technology by its developers, it is good to always check for updates to get new features.
Although the working logic of this program is very similar to the Cisco Packet Tracer program, the biggest difference between them is that Cisco Router and Switch IOS images can be used more comprehensively and in detail. For example, Packet Tracer includes entry-level IOS commands, while other software offers advanced commands for more advanced projects.
With this simulator software, you can use the IOS images of real Cisco devices to make network designs on your computer, but the IOS image of each device may not work compatibly. However, it is a more advanced segment software compared to the Packet Tracer program because the IOS images in other software are insufficient and have limited features.
For those preparing for Cisco’s entry-level networking exams, the first program they should use is Packet Tracer. If more advanced and professional network designs and projects are planned to be developed, then it would be more appropriate to choose and use the Graphical Network program.
Before proceeding with the steps to install GNS3, you can download the latest version of the program by visiting this article or you can create a new account on the official website and download it to your computer.
Likewise, wait for the Solar-PuTTY software to be downloaded and installed, which is necessary for managing network devices such as Routers or Switches.
After installing Wireshark process, click the Accept button to accept the Solar-PuTTY license agreement.
For Solar-PuTTY use, click Continue after typing in your email address.
After the Start menu folder and desktop shortcuts created, and the Uninstall.exe copied to the corresponding location to uninstall it, click Next.
If you want to use Solarwinds tools for free, you can select Yes. If you do not want it, select the No option and click Next.
After successfully installing the program, click Finish to run the program.
Local Server Configuration Settings
After installing GNS3, click the desktop shortcut to run it and the Setup Wizard window will open to check the Local Server settings. In this window, you need to configure the Localhost connection and port.
In the Setup Wizard window, select Run appliances on my local computer and click Next.
In the Local Server Configuration window, check that the Host Binding setting is localhost, and also, if there is an application using the 3080 TCP port in your system, specify a different port number in this window.
You can see that there is no problem to use Graphical Network Simulator on your system in the Local Server Status window.
Check the server’s type, path, host status, and port number in the Summary window and click Finish.
Finally, you can check the version of the program from Help / About.
Adding Router/Switch Router Image
After installing and running the Cisco simulator, you need to add an IOS image to the program. After adding and configuring the IOS images of Cisco network devices to GNS3, you will now be ready to do your projects. To add an IOS image, click on the image below and browse the related article!
Adding Routers to the Workspace and Connecting Two Routers Each Other
After adding the Router IOS image to the simulator program, you can see the device you added by clicking on Devices.
Now, create a new project and add two c7200 Routers to the workspace.
To connect the two routers, click on the cable-like vehicle and click once on R1 to view the empty ports. For example, connect one end of the network cable to the FastEthernet0/0 port of R1 and the other end to the FastEthernet0/0 interface of R2.
After connecting the two Cisco Routers with the FastEthernet interface, run them by clicking the start button.
You can open the CLI prompt by double-clicking on Router R1, or you can right-click and click Console from the displayed options.
To give an IP address to the FastEthernet0/0 interface of the router R1 and to activate the port, follow the commands below.
R1(config)# interface fastethernet 0/0
R1(config-if)# ip address 192.168.1.1 255.255.255.0
R1(config-if)# no shutdown
To verify that the Fa0/0 port is open, execute the following command in the CLI:
R1# show ip interface brief
Likewise, make the settings you have made on R1, also on R2.
R2(config)# interface fastethernet 0/0
R2(config-if)# ip address 192.168.1.2 255.255.255.0
R2(config-if)# no shutdown
Ping R1 via R2 to test the connection between the two routers.
R2# ping 192.168.1.1
How to Use SecureCRT Instead of Solar-PuTTY in GNS3
As you can see while installing GNS3, Solar-PuTTY is configured as a console application by default. However, if you do not want to use Solar-PuTTY software, you can use SecureCRT instead.