It's not a bad idea to add a few serial WICs to this Etherswitch Router, but you can skip this step if you choose. You can add WIC modules on the next page, consisting of either WIC-1T or WIC-2T serial port adapters. You can add a second NM-16ESW,a NM-1FE-TX single FastEthernet adapter, or an NM-4T serial port adapter to slot 2. Never attempt to replace that GT96100-FE adapter with a switch module, as it will not work. Notice that slot 0 is still prepopulated with the GT96100-FE Dual FastEthernet adapter, and slot 1 will have the NM-16ESW module preinstalled.

On the next screen, go ahead and increase the minimum amount of RAM to 256MB, and click Next >: It will automatically name the device Etherswitch router, and place into the Switches device category, instead of Routers.

On the screen where you're asked to name the router, select the 'This is an Etherswitch router' option (this is important!). Choose Yes, as it will load faster, instead of decompressing every time you start the image: You'll be asked if you'd like to decompress this image. (You can also run this image via the GNS3 VM)Select New Image, and click Browse to locate the image in your filesystem (you must supply your own!). Pick run this IOS image via the local computer, and click Next >: This example will use a c3725 router IOS image, but the same steps apply if using the other three platforms listed above.įirst, click Edit->Preferences->IOS Routers->New in the GNS3 GUI. Refer to the switching section of this document to see what features will be unavailable to you. This is a rather simple process, but be aware that your options for configuring Cisco switching while using a c3640, c3660, c3725, and c3745 for this are quite limited. Using a c3725 as an 'Etherswitch Router'# While this was true in the past, GNS3 now supports options such as:Ĭomplimentary campus technologies such as HSRP are also supported.Your selection of image and platform will affect what is possible. One common misconception about GNS3 is that GNS3 does not support advanced switching options. Only then you can go ahead and install these IOS images on your computer. But before you go ahead and download Cisco IOS images, you have to first download and install GNS3 on your computer. Now that you know more about GNS3 or Graphical Network Simulator 3, chances are that you want the GNS3 IOS images download link for your computer. In the new GNS3 1.4, there is a way to run a second category of switches and routers. For older images, we use and maintain Dynamips an emulator dedicated to emulate some Cisco hardware. GNS3 offers multiple ways to emulate IOS.

Lab 02: Configuring Ethernet and Serial Interfaces.

Etherswitch router ios gns3 download