Step 1

• setup virtualbox or VMWare ESXi node

Step 2

• Download GNS3 image (OVA or suitable format)

Step 3

• Create a VM in ESXi (or in VirtualBox) with downloaded ova file
• configure IP as you need

Step 4

• Download and install GNS3 GUI on a machine (your workstation or laptop) https://www.gns3.com/
• Refer install instruction - linux

Step 5

• Open GNS3 GUI -> Connect to GNS3 VM/Image

Step 6

• Create Project

Step 7

• Download ISO images for devices
• or IOS

Connect to real network

• Connecting GNS3 to Real Network in Windows 10 Home
• GNS3 Talks: How to connect GNS3 to a physical network (Part 1).
• Connect GNS3 to the Internet (local server)

install gns3-server locally

sudo apt install  gns3-server

Prepare GNS3 VM for oVirt

Install GNS3 on a remote server

Ref: Install GNS3 on a remote server

cd /tmp
curl https://raw.githubusercontent.com/GNS3/gns3-server/master/scripts/remote-install.sh > gns3-remote-install.sh

## without VPN
bash gns3-remote-install.sh --with-iou --with-i386-repository

## with VPN
bash gns3-remote-install.sh --with-openvpn --with-iou --with-i386-repository

Access the GNS3 Server on - http://YOUR_IP:3080/

[NOT Tried Yet] Convert VirtualBox to KVM format

• Download GNS3 VM for VirtualBOx
• Convert to qcow2 format

qemu-img convert -f vdi -O qcow2 disk-1.vdi disk-2.qcow2

References

• dtechsmag.com-Blogs and Resource for GNS3 and Eve-NG