Cisco basic configuration

Picture 1: Putty serial communication

In this example we will configure a Cisco 2621XM Router

• hostname Viborg1
• fastethernet 0/0 - 192.168.22.1/24
• fastethernet 0/1 - 172.16.0.1/16
• loopback 0/0 - 10.10.10.1/32
• RIP version 2 on both subnets

Connect a cisco Roolover cable from the Routers Consoleport to a COM port on your PC. Start a terminalemulator. I will recommend the terminalemulator putty Start putty and fill out the serial data. Marked with red rings in picture 1. Start the router and you can see on Putty that it is booting. When it has bootet you need to remove the existing configuration if it has one.

Checking for existing configuration

If the router after boot start the System Configuration Dialog as shown in the dialog below, the router has no startup-configuration and you can proceed to Setup step 1. If the router writes some weird messages, you need to erase the configuration.

         --- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: yes

Erasing existing configuration

>To erase the existing configuration you need to login on the router as shown below. Note that we only use the passwords cisco or class. If your router has another password you need to perform the password recovery procedure.

R5>enable
Password:
R5#

After a successful login like shown above you need to erase the startup-config file in nvram: and reload the router. Show below.

R5#erase startup-config
Erasing the nvram filesystem will remove all configuration files! Continue? [confirm]
[OK]
Erase of nvram: complete
R5#reload

And the Router reloads with a empty configuration