Create First GNS3 Topologies

When you start GNS3, you will be prompted to create a new project:

Name the project as desired and then click OK

The GNS3 workspace is the area of GNS3 where you create topologies by adding devices and links:

GNS3 Toolbar, Device Toolbar, and Symbol types.

To create topology click on router symbol and drag 2 routers in workspace.

Click on Add a link then click on router R1 select interface FastEthernet0/0

Then click router R2 and select interface FastEthernet0/0

Now start both routers by right-clicking on router and click Start.

Now access router console by router click on Router and click console.

Router console will be open in Putty.

Now configure IP Address on both router interface and test connectivity.

R1# config t

R1#(config) interface fastEthernet 0/0

R1#(config-if) ip address 192.168.0.1 255.255.255.0

R1#(config-if) no shut

R1#(config-if) end

R2# config t

R2(config)# interface fastEthernet 0/0

R2(config-if)# ip address 192.168.0.2 255.255.255.0

R2(config-if)# no shut

R1(config-if)# end

Check connectivity of both routers using ping command.

R1#ping 192.168.0.2

Ping succeed

Save configuration on both routers.

Congratulations! You have configured a basic GNS3 topology. Now you can create your more complex topologies. and Test others protocols like EIGRP, OSPF, BGP and may others.