![]() ![]() Dynagen: A text based front-end to Dynamips, which uses the hypervisor mode to communicate with Dynamips.Dynamips: Base of GNS3, a Cisco router simulator.The important dependencies are listed below. Successfully installing these dependencies is a prerequisite. GNS3 depends on several libraries and components. describes GNS3 as The software that empowers network professionals. Figure 1: GNS3 starting Figure 2: Adding new IOS Router GNS3 was introduced in September 2007 with a GUI, drag-and-drop facilities for adding network components, and easy storage of created objects and topology. It also provided a simple virtual switch. Version 0.2.5 of Dynamips, released in 2006, introduced hypervisor mode and enabled multiple router simulations on one PC. It had a text based interface and could simulate only one router on one PC, at a time. In 2005, Christophe Fillot wrote Dynamips – a Cisco router simulator. It is also used by students to prepare for lab tests conducted by various certification providers. Is there a way out of this? Yes! Many professionals use GNS3 to simulate complex networks. ![]() ![]() Troubleshooting such networks could also be really difficult if strict change management policies are in place, and specially if downtime and disruption are to be avoided under any circumstances. Reconfiguring a live network – for example, while implementing access control lists (ACLs) in an enterprise network – can be a challenging task. The GNS3 website describes it as the software that empowers network professionals. This article provides the reader with the basics of GNS3 and a few test labs, which could be tried out by interested readers. GNS3 is a software emulator for networks. ![]()
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