CISCO ROUTERS CONFIGURATION: Router Configuration

Components of Router

Router RAM

SDRAM : Router running on this RAM, If Router is switch off, Data(Configuration with out saved) will be lost.
NVRAM : During a Start up, Router is booted from this RAM,

Router works in two mode

When IOS is loaded by router Ram, By Default the router is in User mode

In this mode router is secure. Various Encryption Method is applied on it.

In Privilege Mode, We can configure the router.

step by step command for configure the router.

When router is in User Mode, Then prompt is looked like this.

For transferring from user mode to Privilege Mode we have to write enable command
In Privilege Mode,the prompt is looked like this

the various command for security, Router startup message, interface configuration,etc..

R1(config)#hostname R1

the command hostname is used for changing name of host

R1(config)#banner motd "This is Router 1"

this command is used for displaying message "This is Router 1",when router start

R1(config)#enable secret abdul :

this command set password abdul, for changing User Mode to Privilege Mode.

R1(config)#line console 0

R1(config-line)#password console

R1(config-line)#login

R1(config-line)#exit

line console is set to configuration mode on console port.

password console is set password console on the console port. when user want to configure router through console port, this password is compulsory.

R1(config)#interface fa 0/0

R1(config-if)#ip address 20.0.0.01 255.0.0.0

R1(config-if)#no shutdown

interface fa 0/0 is used to configure fast Ethernet port of router

here we assign ip using ip address 20.0.0.1 255.0.0.0 command

no shutdown is used for putting port on.

R1#show ip int brief

this command is used for showing all the configuration of interfaces

R1#copy run start

this command is used for saving a current configuration on NVRAM.

CISCO ROUTERS CONFIGURATION