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What Does GNS3 Do? Expanin the Advatages and Disadvantages of it


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.


What Does GNS3 Do? Expanin the Advatages and Disadvantages of it



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 : → Network Monitoring / Listening to Network


VPCS : → 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 Device : A real Layer2 and Layer3 Switch lets you use all the features of your network device by adding an IOS image.


Advantages


  • After making the GNS3 definition, let’s examine what the advantages are.

  • Free software.

  • 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).

  • Supports multiple switching options (ESW16 Etherswitch, IOU / IOL Layer 2 images, VIRL

  • Supports all VIRL IOS images (IOSv, IOSvL2, IOS-XRv, CSR1000v, NX-OSv, ASAv).

  • Supports devices of many brands.

  • It can be run without hypervisor

  • Supports both free and paid hypervisors.

  • No need for additional virtualization software.

  • Large and active community (more than 800,000 members).


Disadvantages


  • IOS images are downloaded by the user. (You can download it from Cisco.com and purchase a VIRL license).

  • You need to manually add the Router/Switch images you download.

  • The program runs based on the hardware performance of your computer.

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