LAB: Basic Router Configuration
Router CLI Modes:
Router> User Exec Mode
Router# Privilege Exec Mode (Privilege level 15)
Router(config)# Global Configuration Mode
Router(config-if)# Interface Sub-Configuration Mode
Router(config-line) Line Sub-Configuration Mode
Erasing an Existing Configuration:
Router#erase startup-config
Router#reload
Configuring Hostname:
Router>enable
Router#configure terminal
Router(config)#hostname R1
Configuring Domain Name:
R1(config)#ip domain-name cisco.com
Setting Passwords:
1) Setting enable password:
R1(config)#enable password cisco
2) Setting enable secret password:
R1(config)#enable secret utl
Setting line Passwords:
1) Setting password on console line:
R1(config)#line console 0
R1(config-line)#password utl
R1(config-line)#login
R1(config)#exit
LAB: Basic Router Configuration Page 1
2) Setting password on vty lines:
R1(config)#line vty 0 4
R1(config-line)#password utl
R1(config-line)#login
R1(config)#exit
Configuring IP address on Fast Ethernet (LAN) interfaces:
R1(config)#interface FastEthernet 0/0
R1(config-if)#ip address 10.0.0.1 255.0.0.0
R1(config-if)#no shutdown
R1(config-if)#exit
Configuring IP address on Serial (WAN) interfaces:
R1(config)#interface serial 0/0
R1(config-if)#ip address 201.0.0.1 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#exit
Check Serial (WAN) interfaces for DCE or DTE:
R1# show controllers serial 0/0
Configuring clock rate on DCE Serial (WAN) interfaces:
R1(config)#interface serial 0/0
R1(config-if)#clock rate 64000
R1(config-if)#no shutdown
R1(config-if)#exit
Setting Clock Time:
R1#set clock 2:15:00 Jan 18 2011
Assigning a Local Host Name to an IP Address:
R1(config)#ip host R1 10.0.0.1
R1(config)#exit
Set the time limit when the console automatically logs off:
R1(config)#line console 0
R1(config-line)#exec-timeout 0 0
R1(config-line)#exit
LAB: Basic Router Configuration Page 2
Turns off trying to automatically resolve an unrecognized command to a local host name:
R1(config)#no ip domain-lookup
Set the time limit when the vty session (telnet, ssh) automatically logs off:
R1(config)#line vty 0 4
R1(config-line)#exec-timeout 0 0
R1(config-line)#exit
Configuring password encryption:
R1#service password-encryption
Saving Router’s Configuration (RAM to NVRAM):
R1#copy running-config startup-config (write)
LAB: Basic Router Configuration Page 3
Show Commands:
Display information about the Cisco IOS Software and Configuration register value:
R1#show version
Display information about flash memory:
R1#show flash
Display interfaces configuration:
R1#show interfaces
Display a specific interface configuration:
R1#show interface serial 0/0
Display a summary of all interfaces on router:
R1#show ip interface brief
Display serial (WAN) interface for checking DCE, DTE and clock rate information:
R1#show controllers serial 0/0
Display clock time:
R1#show clock
Display all users connected to device: (through console and vty)
R1#show users
Display the history of entered commands:
R1#show history
Display status of configured layer 3 protocols:
R1#show protocols
Display the configuration currently running in RAM:
R1#show running-config
Display the configuration saved permanently in NVRAM:
R1#show startup-config
LAB: Basic Router Configuration Page 4
