List of most used Cisco IOS commands
Router Models Mode
Description
Router>
User mode
Router#
Privileged mode
Router(config)#
Global configuration mode
Router(config-if)#
Interface mode
Router(config-subif)#
Subinterface mode
Router(config-line)#
Line mode
Router(config-router)#
Router configuration mode
Router(config-if)#exit ↵
Exit interface mode, return you one mode before
Router(config)# Router(config-if)#end ↵
Router#
Exit interface mode, return to global configuration mode, (CTRL+Z)
Global Configuration Mode Command
Description
Router>
Can see config but not change
Router#
Can see config, and move to make changes
Router# conf t ↵ Router(config)#
Moves to global config mode
Router(config)#no ip domain-lookup Disable IP domain name system hostname translation ↵ Router(config)#banner motd ^Hello^ Sets Hello like message of the day banner ↵
Configure Router Name
vty.me
List of most used Cisco IOS commands
Command
Description
Router(config)#hostname vtyme ↵
Name can be any word you choose
vtyme(config)#
After Change was made
Configure Passwords Command Router(config)#enable password cisco ↵
Description Set enable password
Router(config)#enable secret class ↵ Set enable secret password Router(config)#line con 0 ↵
Enter console line mode, sets consoleRouter(config-line)#password console line mode password to console, enable password checking at login and ↵ enable synchronized message output. Router(config-line)#login ↵ Router(config-line)#loggin synchronous ↵ Router(config)#line vty 0 4 ↵ Router(config-line)#password telnet ↵ Router(config-line)#login ↵
Enter vty mode for all 5 vty lines, sets vty password to telnet, enable passowrd checking at login and enable synchronized message output.
Router(config-line)#loggin synchronous ↵ Router(config)#line aux 0 ↵
Enter auxiliary line mode, sets Router(config-line)#password nopass auxiliary line mode password to nopass, enable password checking at ↵ login. Router(config-line)#login ↵ Router(config)#service passwordencryption ↵
Show Commands vty.me
Applies a weak encryption to passwords
List of most used Cisco IOS commands
Command
Descpription
Router#show startup-config ↵
Displays configuration saved in NVRAM
Router#show running-config ↵
Displays configuration currently running in RAM
Router#show protocols ↵
Displays status of configured Layer 3 protocols
Router#show ip route ↵
Displays routing table
Router#show ip protocols ↵
Displays IP routing protocols process parameters and statistics
Router#show vlan ↵
Displays VLAN status
Router#show vtp ↵
Displays VTP information
Router#show spanning-tree ↵
Displays spanning tree topology
Router#show mac-address-table ↵
Displays MAC table
Router#show ip interface brief ↵
Displays summary of interface IP status and configuration
Router#show cdp neghbors ↵
Displays neighbor entries
Router#show version ↵
Displays info about loaded software version
Router#show flash ↵
Displays info about Flash memory
Router#show arp ↵
Displays the ARP table
Router#show history ↵
Displays history of commands used
Router#show users ↵
Displays all users connected to device
Router#show clock ↵
Displays time set on device
Router#show controllers serial 0 ↵
Displays statistics for interface hardware. Statistics display if the clock rate is set and if the cable is DCE or DTE or not attached
Router#show sessions ↵
Displays all telnet connections to
vty.me
List of most used Cisco IOS commands
Command
Descpription device
Saving Configuration Command
Description
Router#copy run start ↵
Saves the running-config to local NVRAM
Router#copy run tftp ↵
Saves the running-config remotely to TFTP server
Configure Interface Command
Description
Router(config)#interface fa0/0 ↵
Moves to Fast Ethernet 0/0 interface mode
Router(config-if)#ip address 192.168.1.2 255.255.255.0 ↵
Assigns address and subnet mask to interface
Router(config-if)#no shutdown ↵
Turn interface on
Router(config-if)#description homelan ↵
Optional description of the link is locally significant
Router(config-if)#no ip address ↵
Remove assign address from interface
Router(config)#interface s0/0 ↵
Moves to Serial 0/0 interface mode
Router(config-if)#clock rate 64000 ↵ Configure serial interface clock speed
vty.me