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Best Practices For Optimizing Your Network Simulations

Network simulations have become an essential tool for professionals aiming to test, design, and optimize network infrastructures without the risks associated with real-world implementations. They provide a safe environment to model complex network behaviors and understand the potential impact of changes before they’re made.

To help you get the most out of your simulations, we’re presenting a compilation of best practices you can implement right away.

1. Choose the Right Simulation Tool

Selecting an appropriate simulation tool is crucial. Here’s a brief overview of some of the best in the market:

This OVA file product boasts a plethora of built-in images, spanning Cisco Switches & Routers, Fortinet Labs, and many more. Moreover, with 300 ready-made EVE-NG labs and workbooks, it’s perfect for those looking to dive straight into CCNA Labs, SD-WAN Labs, and even CCIE lab practices.

If you’re looking for a subscription-based service, this might be your pick. It comes with installed images from an array of vendors and a suite of 300 pre-configured EVE-NG labs and workbooks. This hosted server version offers a seamless experience for those practicing for CCNA, CCNP, and CCIE labs.

Another OVA file product, this tool is laden with 51 of the latest images from vendors such as Cisco, Fortinet, and Juniper. Designed for those who prefer a hassle-free setup, the GNS3 Full Pack is ideal for CCNA and CCNA Security lab practices.

2. The Importance of Keeping Your Images Updated

In the ever-shifting landscape of network technologies, staying abreast of the latest advancements is not just a recommendation—it’s a necessity. This is particularly true when dealing with network simulations, where the goal is often to mirror real-world conditions as closely as possible.

computer networking platforms

  • Reflecting Real-world Systems: In the real world, software gets patched, features get added, and vulnerabilities are addressed. When your images in network simulations are outdated, you risk working in an environment that doesn’t align with current real-world systems. By updating your images, you ensure that the configurations, features, and functionalities you’re practicing with are in sync with what you’ll encounter in an actual network setup.
  • Enhanced Security: With newer images come improved security features and patches for known vulnerabilities. Working with updated images means that you’re not just preparing for the most recent operational scenarios but also the most secure ones.
  • Benefiting from Latest Features: Every update might bring about new features or improvements to existing ones. By regularly updating your images, you harness the full potential of your simulation tools, making sure you’re familiar with the most current tools and configurations.

3. The Value of Pre-Configured Labs

Starting a network simulation from ground zero might seem like a good learning exercise, but it can be time-consuming and, at times, redundant. This is where pre-configured labs come into play.

Ø Efficiency and Time-saving

Imagine the time it takes to set up a complete network simulation with multiple nodes, devices, and configurations. Now, contrast that with simply loading a pre-configured lab. The time saved is substantial, allowing you to focus more on practicing and troubleshooting rather than the initial setup.

Ø Tried and Tested Environments

Pre-configured labs, especially those from reputable tools like EVE-NG LABs Full Pack and GNS3 Full Pack Images, are curated by experts. This means you’re working within an environment that’s been vetted for accuracy and functionality. It reduces the chances of encountering unexpected issues due to configuration errors, which can be quite common when setting up simulations from scratch.

Ø Variety of Scenarios

One of the significant advantages of pre-configured labs is the diversity they offer. Whether you’re practicing for a CCNA lab, a CCIE scenario, or anything in between, these labs provide a wide range of scenarios catering to different learning objectives. Instead of repetitively creating different setups, you can swiftly transition between various scenarios, making your learning process more comprehensive and diverse.

GNS3 download

4. Ensuring Adequate Hardware Resources

One of the primary requisites for smooth network simulations is the availability of appropriate hardware resources. Given the complex nature of these simulations, it’s not uncommon for them to demand significant computational power. At the forefront of these demands are the CPU, memory, and disk space.

The CPU, acting as the brain of your system, manages the simulation tasks. If it’s constantly running at high capacities, it can lead to system lags or even crashes. Memory, on the other hand, temporarily stores the simulation data, ensuring swift access and processing. Inadequate memory can substantially slow down simulations, leading to extended waiting times.

Lastly, disk space is where all the simulation data gets stored. Running out of it can not only halt your current simulation but also risk the corruption of previously stored data. Therefore, it’s crucial to proactively monitor these resources. Utilize system monitoring tools or built-in system performance checkers to keep an eye on the utilization levels.

If you notice any resource consistently hitting its upper limit, it’s a clear indication that you might need to consider hardware upgrades or optimizations. Upgrading might seem like an investment, but in the long run, it ensures seamless simulations, saving time and ensuring accurate results.

computer networking

5. Simulating Real-World Scenarios

The essence of network simulations lies in their ability to replicate real-world scenarios. When setting up a simulation, it’s tempting to go for simplified or idealized configurations. However, doing so might not yield results that accurately represent real-world network behaviors. Instead, it’s more beneficial to model scenarios that mirror actual or potential real-world situations.

For instance, if you’re testing a network’s response to traffic surges, rather than simulating a constant traffic flow, introduce variations and peaks akin to what might be observed during special events or specific times of the day. If you’re assessing security configurations, simulate common attack vectors or patterns seen in the wild.

By embracing such realistic patterns, you not only understand how your configurations stand up to actual challenges but also better prepare for potential surprises in live environments. Furthermore, real-world simulations can uncover nuances that might be overlooked in simpler models.

These detailed insights are invaluable, helping network professionals fine-tune their setups and ensure optimal performance when the configurations are eventually deployed in real-world situations.

6. Documentation: The Keystone of Effective Network Simulations

The significance of documenting your network simulation outcomes cannot be emphasized enough. Every simulation run provides a wealth of data, insights, and potential lessons. By meticulously recording these outcomes, professionals establish a roadmap for their network journey. This record-keeping not only helps in keeping tabs on the alterations made but also deciphers which configurations yield the most favorable results.

Imagine running a simulation and achieving near-perfect results, only to find a few weeks later that you cannot replicate the same success. Without proper documentation, you’re left retracing your steps, which is both time-consuming and inefficient.

By maintaining a comprehensive log, you set up a repository of knowledge. This repository then becomes invaluable for future simulations or real-world implementations, allowing for consistency and continuous improvement. In essence, your documentation becomes a living testament to your work, a legacy that provides clarity and direction for future endeavors.


If you still need help understanding the best practices for network simulation platforms, Dynamips Store can help with that. In the world of IT networking, Dynamips stands out as a leading platform for professionals. With a solid history of 17 years, we’ve become experts in facilitating the deployment of EVE-NG and GNS3 emulators.

What makes us unique? We offer a virtual machine in the form of an OVA file that’s up and running within half an hour.

Get in touch with us today and get your hands on the latest versions of EVE-NG and GNS3 emulators.

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