How to Download and Use Cisco Router 3700 IOS Image for GNS3
If you are preparing for Cisco exams, you may want to use a network simulator such as GNS3 to practice with Cisco devices. However, GNS3 does not provide any Cisco images by itself, so you need to download them from other sources. In this article, we will show you how to download and use Cisco Router 3700 IOS image for GNS3.
What is Cisco Router 3700 IOS Image
Cisco Router 3700 IOS image is a file that contains the operating system and configuration of a Cisco Router 3700 series device. It can be used to emulate a router on GNS3, which is a graphical network simulator that allows you to design and test network topologies. GNS3 supports various Cisco devices, such as routers, switches, firewalls, and more.
Cisco Router 3700 series devices are versatile routers that can handle various network scenarios, such as branch offices, enterprise networks, service provider networks, and more. They support features such as IP routing, voice over IP (VoIP), quality of service (QoS), security, and more. They also have modular slots that can accommodate different interface cards.
Where to Download Cisco Router 3700 IOS Image for GNS3
There are several ways to obtain Cisco Router 3700 IOS image for GNS3. Here are some of them:
Cisco website: You can download IOS images directly from Cisco's official website if you have a valid service contract with them. You can access the download page here: https://software.cisco.com/download/navigator.html. You need to select the router model and IOS version that you want to download. The only IOS images that work with Dynamips (the emulator that GNS3 uses for Cisco routers) are the c7200 images (not the c7200p images!). The images for other router models have been removed due to end of support status[^2^].
VIRL: VIRL is a network simulation platform developed by Cisco that allows you to create and run virtual network topologies. It includes various Cisco images that you can use with GNS3. You need to purchase a VIRL license to access these images. The price starts at $199.99 per year for the Personal Edition. You can find more information about VIRL here: http://virl.cisco.com/. You can use VIRL images without license authentication on GNS3[^2^].
Physical Cisco devices: If you own a physical Cisco Router 3700 device, you can copy the IOS image from the device and import it into GNS3. You need to connect the device to your computer via a console cable and use a terminal emulator program such as PuTTY or Tera Term to access the device's command-line interface (CLI). You can then use the show flash command to see the name and location of the IOS image file on the device's flash memory. You can then use the copy flash tftp command to transfer the file to your computer via a TFTP server program such as SolarWinds or TFTPD32/64. You can then add the file to GNS3.
Other sources: There are some websites that offer free or paid downloads of Cisco IOS images for GNS3. However, these sources are not authorized by Cisco and may contain malware or viruses. We do not recommend using these sources as they may violate Cisco's terms of service and intellectual property rights.
How to Use Cisco Router 3700 IOS Image for GNS3
Once you have downloaded the Cisco Router 3700 IOS image file, you need to add it to GNS3 and configure it properly. Here are the steps:
Open GNS3 and go to Edit > Preferences > Dynamips > IOS Routers.
Click on New and select New Image in the wizard.
Browse to the location of the IOS image file on your computer and click on Open.