Basic Cisco Commands
Basic Commands
Config Modes
Disabling the Cisco Discovery Protocol
• User Exec Mode
-if you want to show the devices neighbor
•
Default Configuration
• view the settings on the device but not
make any changes
“>”
• Privileged Exec Mode
• To make changes to the device
• Maybe required a password
“ #”
• Global Configuration Mode
• to make global changes to the router
such as the hostname.
• type "configure terminal" or "conf t"
“(config)#”
• Sub Prompts
• to modify settings on a specific
interface
• to modify the different ports on the
device.
//Add Hostname
Router(config)# hostname CLSU//
Creating Banners
Router1#configure terminal Enter configuration
commands, one per line. End with CNTL/Z
Router1(config)#banner login # This is a
login banner #
Router1(config)#banner motd $ This is a motd
banner $
Router1(config)#end
Router1(config)#no banner motd
Router(config)#cdp run
Router#show cdp
Router#show cdp neighbors
#Reload- command to boot the default OS
configuration of the devices
#show ip arp-command to show the ip address of
the devices/interface
Disabling the Cisco Discovery Protocol
-disable all CDP on the router
Router1#configure terminal
Enter configuration commands, one per
line. End with CNTL/Z.
Router1(config)#no cdp run
Router1(config)#end Router1#
Create password for Console
R1(config)# line console 0
R1(config)# password cisco
R1(config-line)# login
R1(config-line)# exit
R1(config)#service password-encryption
User Access and Privilege Levels
• Setting Up User IDs
– Router1#configure terminal Enter
configuration commands, one per line. End with
CNTL/Z.
– Router1(config)#username kdooley password
cookbook
Router1(config)#aaa new-model
Router1(config)#aaa authentication login
Save the Configuration
default local
– Router1#copy run start
Router1(config)#end
• Router1#copy running config startup config
Enable Telnet and SSh
Configure an interface
• R1>enable
Router1>enable
R1#configure terminal
Router1#configure terminal
Enter configuration commands, one per line.
End with CNTL/Z. R1(config)#line vty 0
Router1(config)#interface FastEthernet0/0
R1(config-line)#password Pass123
R1(config-line)#login
Router1(config-if)#ip address 192.168.1.1
255.255.255.0
Router1(config-if)#no shutdown
R1(config-line)#logging synchronous
R1(config-line)#exec-timeout 40
R1(config-line)#motd-banner
R1(config-line)#exit
Encrypting Password
Router1#configure terminal
Enter configuration commands, one per line.
End
with CNTL/Z. Router1(config)#enable
password oreilly
Router1(config)#line vty 0 4
Router1(config-line)#password cookbook
Router1(config-line)#line con 0
Router1(config-line)#password cookbook
Router1(config-line)#line aux 0
Router1(config-line)#password cookbook
Router1(config-line)#exit
Router1(config)#service password-encryption
Router1(config)#end Router1#
END