GNS3 – Networking

I finally found time to install and mess with GNS3 and I’m so happy that I did.  Whether you’re studying for certifications or a professional network engineer GNS3 is definitely a must have tool.  GNS3 also has a great community following and here’s an example.  Mark Blackwell posted multiple how-to video’s showing various features of GNS3 and how to configure them in labs.  Features such as Static Routing for Beginners, NAT Port Forwarding, IOS Firewall, Dynamic Access List,  Address Resolution Protocol ARP Concepts with GNS3, and the list goes on.

GNS3 is a Graphical Network Simulator that allows emulation of complex networks.  It allows you to run a Cisco IOS in a virtual environment on your computer. Dynamips is the core program that allows IOS emulation. GNS3 runs on top of Dynamips to create a more user friendly, graphical environment.

GNS3 is an alternative or complementary software tool to using real computer labs for computer network engineers, administrators and people studying for certifications such as Cisco CCNACCNP and CCIE as well as Juniper JNCIA, JNCIS and JNCIE. It can also be used to experiment features or to check configurations that need to be deployed later on real devices. GNS3 also includes other features like connection of the virtual network to real ones or packet captures using Wireshark.



Introduction to GNS3

GNS3 Wikipedia