![]() The GNS3 web site provides a set of prepared Linux appliances that can be used to emulate routers, servers, and hosts in a virtual network. At this point, we still cannot use GNS3 because we need to create the virtual machines that GNS3 will use in the emulated network. Now, we see the blank GNS3 application window. We do not need any of these setting when working exclusively with Linux virtual machines in GNS3. Just click on the “OK” button at the bottom of the wizard window. To start using GNS3, click on the menu command: Start → Education → GNS3 In the Xubuntu start menu, GNS3 appears under “Education” and Wireshark appears under “Internet”. To install the dkms package, execute the command: $ sudo apt-get install dkmsĪfter installation is completed, the Oracle VirtualBox virtual machine manager will appear in the Xfce menu under “System”. The Oracle web site also recommends installing the dkms package to ensure that VirtualBox is properly updated if the Linux kernel version changes during the a system upgrade. At the time of writing this post, the latest VirtualBox package was: virtualbox-4.3_4.3.6-91406~Ubuntu~raring_b. In my case, I chose to install the latest version of VirtualBox, version 4.3, using the procedure described above. The Ubuntu Software Center will automatically start and install the latest version VirtualBox from the downloaded. Then, in your File Manager, double-click on the. ![]() To install the latest version of VirtualBox, download the latest package from the Oracle VirtualBox web site. However, if you - like me - always want the latest and greatest version on your computer, follow the steps described below to install the most recent available version of VirtualBox. The version available from the Ubuntu repositories is good enough. The version of VirtualBox available in the Ubuntu Software Center is not the latest version available from VirtualBox’s developer, Oracle. Search for VirtualBox in the Ubuntu Software Center and click on “install”. The easiest way to install VirtualBox in an Ubuntu Linux-based system (I am using Xubuntu) is to use the Ubuntu Software Center program. When emulating nodes other than Cisco routers, GNS3 can use VirtualBox to manage the virtual machines that run linux (or other PC operating systems). The procedures I demonstrate using GNS3 and VirtualBox on my Linux system should also be usable on computers running either Windows or Mac OS. Access to hardware virtualization support makes very noticeable improvement in performance. VirtualBox can also utilize the hardware virtualization support technologies available on most computers while Qemu can only access these features in the Linux operating system (via KVM), with restrictions. Many users of GNS3 choose to use VirtualBox to run Linux virtual machines because, like GNS3, it works the same on Windows, Mac OS, and Linux operating systems. Next, we need to install software to support running the Linux virtual machines that will be managed by GNS3.
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