You can easily install this network simulator on Windows, Mac OS X, Linux, Unix, FreeBSD.
Christophe Fillot is the founder of Dynamips (MIPS Processor Emulation Program), which enables network devices such as Cisco Routers to work in a virtual environment. The founder of Dynamips is Grossman.
As an alternative to this program, you can also use the Cisco Packet Tracer program developed by Cisco Networking Academy.
What Does GNS3 Do?
Compared to other network simulator programs (RouterSim, Boson NetSim), you can use Cisco IOS images more specifically with the back-end Hypervisor software through this network simulator program.
Other software includes network devices such as Routers or Switches. As a result, you can run and use a real Cisco Router on your computer with GNS3.
This simulator software uses IDLE-PC Value to show better performance of Cisco Routers or Switch IOS and shows you the optimal value with * character.
You can set the Idle-PC value when adding a device to the program.
Network Simulator Program Term
GNS3 → GUI (Graphical User Interface) Dynamips → Emulator for IOS Dynagen → Beginning Front End for Dynamips Pemu → Cisco PIX Firewall Emulator Based on Qemu (Win)Pcap → Packet Capture Library (Driver for Sniffer) Wireshark(Old Name: Ethereal) → Network Monitoring / Listening to Network VPCS→ Virtual PCs (Virtual Computer) → Adding a virtual computer. VMware VMS → VMware Virtual Machines → Including virtual machines in topology with VMware Workstation. VirtualBox VMS → VirtualBox Virtual Machines → Including virtual machines in topology with VirtualBox. IOU Devices → A real Layer2 and Layer3 Switch lets you use all the features of your network device by adding an IOS image.
After making the GNS3 definition, let’s examine what the advantages are.
Open Source software.
No monthly or annual license fees.
There is no limit to the number of supported devices (only the limitation is your hardware: CPU and memory).