Since these are IOS images, they will act like real routers, as you’ll see.Īfter R1 loads up, we’ll already be at the enable prompt, due to the configuration files GNS3 includes (they also configure “logging sync” and “exec-time 0 0” on line con 0 for us, and let us bypass that initial configuration dialog). This powers on all devices in the Workspace, as well as launches Solar-Putty and creates tabs for each device: Click the Interface Names icon (this is optional), to display the interfaces on each device, that have been connected together.īelow, the green Start button (marked #1) and the Console button (marked #2) have been selected. of 8 CCNA Exploration Routing Protocols and Concepts: Introduction to Routing and Packet Forwarding Lab: Basic Router Configuration R1(config-if)ip address 192.168.1.1 255.255.255.Left click FastEthernet0/0 of R1, and connect it to FastEthernet0/0 of R2.In this example we’ll use FastEthernet0/0 of each router to connect them together: Click on a device in your topology to display available interfaces.The mouse cursor will change to indicate that links can be added: Click the Add a Link button to start adding links to your topology.Click the Toolbar Device button again (or the X in the corner of it) to collapse the group:.Drag and drop the node again into the GNS3 Workspace, which will result in routers R1 and R2 appearing in both the Workspace, and the Topology Summary:.The more interfaces you apply this command to, the more secure you’ll be against potential attacks. End with CNTL/Z router (config) interface FastEthernet 0/0 router (config-if) no ip directed-broadcast. In this example a router is now available: router> enable router configure terminal Enter configuration commands, one per line. An instance of the node becomes available in the Workspace.

Drag and drop the selected node (device) to the GNS3 Workspace.

In this example, a c3725 IOS image has already been imported, so we’ll use it.

In this example the Routers group was selected:

To create a new GNS3 topology, select a group of devices in the Devices Toolbar by clicking the device type button.

If not, please refer to other guides which explain how to download, install and configure GNS3. This document assumes that you already have GNS3 installed and a Cisco IOS router image added to GNS3.

Configure GNS3 to use an additional remote server.

How to use applications with the GNS3 Web interface.

Install an appliance from the GNS3 Marketplace.

Basic router configuration