How to Assign an IP Address to Cisco Router Interfaces (FastEthernet & GigabitEthernet & Serial Interface)

This video shows you how to add an IP to the Ethernet, FastEthernet, GigabitEthernet, Serial interfaces of a Cisco Router or Switch on GNS3.

Although it is very easy to give IP to Router, this can sometimes be confused.

According to the network design you have created, you have to assign an IP address and Subnet Mask to the Routers. Otherwise, you will not be able to communicate with your computers on the network.

You can analyze your network better by configuring the ports of a Router in GNS3.

Now, to assign an IP address to the Ethernet interfaces, first, turn on your device and open the CLI prompt.

Move from user mode to privileged mode in CLI and after specifying the Cisco interface to which you will add an IP address, and then use the following command.

Router(config)# interface fastethernet 0/0
Router(config-if)# ip adress

After assigning an IP address, execute the command below to open the port.

Router(config)# interface fastethernet 0/0
Router(config-if)# no shutdown

You can use the command “show ip interface brief” in the user access mode to check whether the ports on your router are active or not.

   Related Articles

1. Cisco Hostname
2. GNS3 Cloud
3. Installing GNS3
4. GNS3 VM Upgrade
5. Importing GNS3 VM



In my personal blog, I will explain the solutions to the problems I encounter in the system, network, and information technologies for you. If you want to contact me or consult about a problem, you can send an e-mail to [email protected]