GNS3 Setup Wizard - Local server
This document explains how use the GNS3 Setup Wizard to configure a GNS3 local server. This is also called a local Dynamips implementation of GNS3.
If you want to use IOSvL2, IOU, IOSv, IOS-XRv, ASAv or want to create more complex topologies, the GNS3 VM is recommended for Windows and Mac OS implementations.
The GNS3 Setup Wizard is displayed when GNS3 starts up for the first time. This provides an easy way to initially configure GNS3 options:
You can also manually start the Setup Wizard at any time by clicking Help and then Setup Wizard in the GNS3 software:
OptionalYou can disable the Setup Wizard from displaying by selecting the Don't show this again checkbox:
Select Local server in the Wizard and click Next > :
IMPORTANTThis guide explains the Local server set up. For the Local GNS3 VM guide click here
The option Add an IOS router using a real IOS image (supported by Dynamips) is selected by default. This is the option you will use for this wizard. For all other options, the GNS3 VM is recommended. Click Finish:
The New IOS router template window displays. Click New Image and then Browse:
Browse to the folder where you have stored your Cisco IOS images, select the image and click Open:
IMPORTANTSome vendors provide images of their systems for free. Others like Cisco do not and you are required to provide your own images. GNS3 are unable to provide Cisco IOS images. You will need to provide your own images to use GNS3.
GNS3 can decompress IOS images to allow for quicker booting of routers in your GNS3 topologies. This is recommended for a better user experience. Click Yes to decompress the image:
The directory where the decompressed image is stored is displayed. Click Next > to continue the setup:
The Name and platform window displays. Confirm the Platform selection, and configure the router Name. Click Next > :
A Default RAM setting is displayed. It is important that you check your Router's minimum memory requirements using the Cisco website. Click the Check for minimum and maximum RAM requirement option:
The Cisco Feature Navigator is opened in your default web browser. Select Image Name and enter the name of the image you are using:
Click Search for Image(s):
The minimum DRAM requirements for the IOS are displayed. Note the value for your IOS image:
Set the Default RAM value to the value recommended by the Cisco Feature Navigator (yours may be different to the screenshot) and click Next > :
Select your preferred Network adapters. This is device dependant.
In this example both Ethernet and Serial interfaces have been added to the router. Once selected, click Next > :
As an NM-4T was selected in the previous step, WIC modules can now be added. This option will depend what you selected in the previous step. Once completed, click Next > :
It is important for optimum GNS3 performance that an Idle-PC value be selected. If a green Idle-PC value is NOT shown then click the Idle-PC finder button to find an Idle-PC value:
If you selected the Idle-PC finder button (only necessary if no value was detected automatically), GNS3 will calculate a value:
An Idle-PC value is displayed. Click OK to complete:
If no Idle-PC value is displayed, try clicking the Idle-PC finder button again. You may also need to reboot your computer and try again is no value is found.
Click Finish to complete the GNS3 Setup Wizard:
The Preferences window displays showing the settings you have configured through the Setup Wizard. Click OK to complete the process:
The GNS3 workspace displays:
Congratulations! You are now ready to create your first GNS3 topologies. Click here to create a basic GNS3 topologies