Basic Configuration of Cisco Routers

in this article, I will discuss about Basic Configuration of Cisco Routers.

You want to learn how to configure a Cisco router? do not worry, this time I will give you a little experience on how to configure Cisco router. But on this occasion, I will only discuss about the basic configuration, which is a configuration that is generally done by an administrator. Ok, see, the following discussion.

Basic Configuration of Cisco Routers
Cisco Router

To configure the router is done, the first step that needs to be done is, build a console session. Console session is formed by connecting the console port on the router with COM 1 port on PC.

After the console session is formed, next activate the emolution terminal, which is commonly used in Windows Operating System is hyper terminal (router configuration via minicom in Linux see here). Enable hyper terminal, make sure the selected port is COM1, then configure:

Bits per second: 9600 bps
Data bits: 8
Parity: none
Stop bits: 1
Flow control: none

Then turn on the router (power on), the router will boot up, after the boot process is complete the router will display the message "Would you like enter initial configuration dialog?" Should answer "no". then the router displays the message "Press return to get a start". To start we press the "Enter" key. In the router that has not been configured then the router will display a prompt "router>" which indicates we are in EXEC user operation mode.

to start the configuration enable "enable" like the following example:

Router> enable
Router #

Currently, we are in the EXEC privilege operation mode, the configuration is usually done in global configuration mode, meaning that the configuration done in this mode will affect the whole system. If we were in EXEC privilege mode then to switch to global configuration mode the command is:

Router # config terminal or
Router # conf t

Some basic configurations that need to be done are:

a. Hostname

Its function is to name the router

syntax:

router (config) #hostname desired router name

eg the name of the desired router is cisco, then the command form

router (config) #hostname cisco
cisco (config) #

b. Enable password

Its function is to enable the password in enable command

syntax:

cisco (config) #enable password passwords are desired

eg the password-word is cisco, then the command form

cisco (config) #enable password cisco

c. Enable secret

Its function is to enable secret word in enable command, its function is same as enable password command, but enable secret has higher priority and secret word in encrypted form.

syntax:

cisco (config) #enable secret the desired secret-word

for example, the desired secret word is the class, then the command form is

Cisco (config) #enabel secret class

c. Line console

Enable the password on the line console, so that only people who know/have my password that can access the router through line console. The router only has 1 line console.

cisco (config) #line console 0
cisco (config-line) #password password-word is desired
cisco (config-line) #exec-timeout 5
cisco (config-line) #login
d. Line auxiliary

Enable the password online aux, so that only people who know/have my password that can access the router through line aux. The router only has 1 line aux.

cisco (config) #line aux 0
cisco (config-line) #password password-word is desired
cisco (config-line) #exec-timeout 5
cisco (config-line) #login

e. Line Virtual Terminal

Enable passwords on the virtual terminal line, so only the person who knows/has my password can access the router through the virtual terminal line. The router only has 5 virtual terminal lines (vty).

cisco (config) #line vty 0 4
cisco (config-line) #password password-word is desired
cisco (config-line) #exec-timeout 5
cisco (config-line) #login

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