- If youâ€™re using GNS3 than load the Stub Area Networking GNS3 topology than Router 1.
- Establish a console session with Router 1.
- Configure the Primary IP Address of 10.234.51.254/24 on interface FastEthernet0/0
- Configure a Secondary IP Address of 172.27.48.254/24 on Interface FastEthernet0/0
- Activate the FastEthernet0/0 Interface.
- Verify your configuration changes via the running-configuration.
Configuring an IP address on a Cisco router and/or switch is a very common task and youâ€™re required know how to do it without referencing any documentation as a CCNA.
To get started, navigate your way into Global configuration mode as shown below.
Step 1. â€“ Configure the IP address 10.234.51.254 on interface FastEthernet0/0. In order to to this configuration youâ€™ll need to place yourself into FastEthernet0/0 interface configuration mode as shown below.
To view the available interfaces for configuration execute the interface ? from global configuration mode.
Once in interface configuration mode you use the command syntax ip address n.n.n.h s.s.s.m; to complete the first lab objective weâ€™ll need to execute the ip address 10.234.51.254 255.255.255.0 from the FastEthernet0/0 interface configuration mode as shown below.
Step 2. â€“ Configure a Secondary IP Address of 172.27.48.254/24 on Interface FastEthernet0/0
As noted in the beginning of the lab, secondary IP addresses are commonly used during network re-ip migrations. Using secondary IP Addresses in production as a architectural design is not recommended by Cisco. To complete the second objective of this lab youâ€™ll need to issue the ip adddress command again with the correct address and just add the word secondary to the end of the command syntax.
Step 3. â€“ Activate the FastEthernet0/0 Interface. By default, all interfaces on a Cisco router are placed in â€œAdministratively Downâ€. To bring an interface up, issue the no shutdown command.
Step 4. â€“ Verify your configuration changes via the running-configuration.
To verify your configuration changes, exit the interface configuration mode to privileged mode by pressing CTRL + Z and executing the command show run interface FastEthernet 0/0