![]() All of this without having dedicated network hardware such as routers and switches. From the webpage: GNS3 is an open source software that simulate complex networks while being as close as possible to the way real networks perform. The R2 and VPC can get their IP address without a problem, however, the vmwareVM cant receive the IP address. Graphical Network Simulator (GNS3) allows you to simulate a network on your computer. This document will show you two methods of adding a virtual machine to GNS3: Manually using a local install of GNS3. Even though this document discusses the use of VMware virtual machines, you can do something similar using Virtualbox. ![]() What I found to be the actual problem is that I am running a version of Windows that also supports Hyper-V, and it turns out that if Hyper-V is turned on, nested virtualization won't work in VMWare. In GNS3, I have configured the DHCP pool on the router R1, and I have a vmware VM (Ubuntu 16.04), another router R2 and VPCs are connected to R1. This document explains how to add VMware virtual machines to GNS3 topologies. When I ping OWRT an ARP request can be seen, but no reply is sent. I can connect two devices through a switch and ping back and forth, but not to the OpenWRT device, not matter what. A VMware virtual machine will be added to the template. ![]() This may not be a requirement for you, but it is for me, and so I don't really consider this a solution. 1 No matter what I try in GNS3 to get OpenWRT to run properly, I cannot get it to properly work with other GNS components. In the Network tab, check Allow GNS3 to override non custom VMware adapter and click OK to finish. sudo apt update sudo apt install gns3-server gns3-gui. Once the repository has been added, installation of GNS3 packages on Ubuntu 20.04 can be performed. However, be advise that KVM support (nested virtualization) will be disabled, and so you will not be able to run things like Cisco VIRL images. Step 2: Install GNS3 GUI & GNS3 Server on Ubuntu 20.04. If you go to Virtual Machine Settings > Hardware > Processors and uncheck "Virtualize Intel VT-x/EPT or AMD-V/RVI", you should be able start and use the VM. By default, the GNS3 VM is set up to support nested virtualization, and if you are seeing this error message, it is because there is something going on in your host system that is preventing nested virtualization from working.
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