Open-source network simulation roundup 2024
As of early 2024, my list of network simulation and emulation tools remains stable. This post provides the latest status of the tools I list in this blog.
cloonix
Twenty-five open-source network emulators and simulators you can use in 2023
I reviewed the development and support status of all the network emulators and network simulators previously featured in my blog, as of early 2023.
Enable nested virtualization on Google Cloud
Google Cloud Platform introduced nested virtualization support in September 2017. Nested virtualization is especially interesting to network emulation research since it allow users to run unmodified versions of popular network emulation tools like GNS3, EVE-NG, and Cloonix on a cloud instance. Google Cloud supports nested virtualization using the KVM hypervisor on Linux instances. It does
Install and run the Cloonix network emulator on Packet.net
This tutorial shows how to set up the Cloonix network emulator on a Packet.net server. It builds on top of my previous post about how to set up a virtualization server on Packet.net. Now, I focus on a specific case: setting up the Cloonix network emulator on the virtualization server. You should read my previous
DNS and BIND demonstration using the Cloonix network emulator
The Domain Name System (DNS) is a fundamental Internet technology. Network emulators like Cloonix offer a way for researchers and students to experiment with the DNS protocol and with the various open-source implementations of DNS, such as BIND. In this post, I will install Cloonix from the Github source code repository. I will run the
Saving a Cloonix network topology
The Cloonix network simulator has been updated to version 29, which adds the ability to save network simulation topologies and node configurations to a directory. Users may save a network topology and all node configurations to a directory of their choice. They may also load saved topologies into Cloonix so they can restore a network
Cloonix Network Simulator updated to v28
The Cloonix development team recently released a major update to the Cloonix network simulator. Cloonix version 28 makes major changes to the infrastructure of Cloonix. It changes the installation procedure, the location of Cloonix files on your computer, and the names of the commands used to start and administer Cloonix. Cloonix version 28 also makes
KVM Performance Limits for virtual CPU cores
I need to determine the maximum number of KVM virtual machines that can run on an average laptop computer. Unfortunately, I cannot find authoritative information about the maximum number of KVM virtual machines that can run on a host computer. Most information I could find about KVM limits does not publish absolute limits but, instead,
Cloonix network simulator updated to version 26
The Cloonix development team released an update to Cloonix version 26 in May 2015. An important addition in version 26 is a greatly expanded and improved Cloonix user guide. The new version also changes the user interface, adds a new LAN type, and eliminates the t2t device. It also includes updated guest virtual machines.
Run desktop environment on guest VM in cloonix network simulator
The Cloonix open-source network simulator uses the Spice remote desktop system to provide a virtual desktop connection to quest virtual machines that run a graphical user interface, such as Microsoft Windows or a Linux desktop environment. To use a graphical desktop user interface on a guest VM, we access the VM using the Spice desktop
How to run X applications on a guest VM in the cloonix network simulator
To run a program that uses a graphical user interface on a guest virtual machine running in the cloonix open-source network simulator, log into the guest VM from the host computer using SSH and forward the X11 display. Then, any X11 program you run on the guest VM using that SSH session, such as Wireshark,
How to simulate an IPv6 network using the cloonix network simulator
As we work through this tutorial, we will learn how to use the cloonix graph interface to build a simulation scenario that includes two small IPv6 networks connected to each other by two routers via static routes. We will also learn how cloonix saves network topologies and guest virtual machine root filesystems. The cloonix open-source