Install GNS3 on Ubuntu 20.04

Install GNS3

  1. sudo add-apt-repository ppa:gns3/ppa

  2. sudo apt update

  3. sudo apt install gns3-server gns3-gui

Install IOU Support (Optional)

IOU (IOS over Unix) is an internal Cisco tool for simulating the ASICs in Cisco Switches. This enables you to play with Layer 2 switching in your LABS.

  1. sudo dpkg --add-architecture i386
  2. sudo apt update
  3. sudo apt install gns3-iou

Add your user to the following groups:

for i in ubridge libvirt kvm wireshark; do
  sudo usermod -aG $i $USER
done

Done.