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Basic Cisco IOS Commands Cheat Sheet by

Command-line interface commands and keyboard shortcuts for Cisco IOS

Modes

Level
Mode
Prompt
1
User EXEC
Device>
2
Privileged EXEC
Device#
3
Global Config
Device­(co­nfig)#
4a
Interface Config
Device­(co­nfi­g-if)#
4b
Line Config
Device­(co­nfi­g-line)

Keyboard Shortcuts

Up Arrow
Automa­tically re-types last command
Ctrl+Shift+6
Oh crap, stop! (Cancels whatever it's currently doing)
Ctrl+C
Exits config mode
Ctrl+Z
Applies current command & returns to priv. EXEC mode
Ctrl+U
Erases anything on current prompt line
Tab
Completes abbrev­iated command

"­Sho­w" Commands

Comm­and
Info­rmation Displa­yed
show version
IOS version, memory capacity, etc.
show mac address-table
MAC address table
show ip route
routing table
show interface g0/0
status, MAC, IP, etc. for Gigabit Ethernet 0/0
show ip interface brief
name, IP, status, etc. (all interf­aces)

Other Commands

Comm­and
From Mode
Func­tion
sdm pre dual def
global config
used if switch won't take IPv6 address

General Commands

Short
Command
Complete Command
Func­tion
en
enable
user EXEC > priv. EXEC
conf t
config terminal
priv. EXEC > global config
int
inter­face
global config > interface config
li
line
global config > line config
sh run
show runnin­g-c­onfig
shows current config
cop r s
copy runnin­g-c­onfig startu­p-c­onfig
saves current config
no ip dom lo
no ip domain-lookup
keeps router from trying to read bad cmds as host names
era star [Tab]
erase startu­p-c­onfig
MUST use after labs to reset router configs!
del vlan.d­at
delete vlan.dat
MUST use after labs to reset router configs!
 

Initial Config­uration (Switches and Routers)

Comm­and
From Mode
What It Does
hostname xyz
global config
sets hostname to xyz
enable secret xyz
global config
sets encrypted password for priv. EXEC to xyz
service passwo­rd-­enc­rypt
global config
encrypts all passwords
line console 0
global config
enters line config mode for console
line vty 0 15
global config
enters line config mode for 16 vty lines
pas­sword xyz
line config
sets line password to xyz
log­in
line config
enables users to login
int vlan 1
global config
enters interface config mode for vlan1
ip address [IP] [subnet]
interface config
sets IP address
no shut
interface config
turns on interface
banner motd #Text Here#
global config
sets motd banner

Router­-Sp­ecific Config­uration Commands

Comm­and
From Mode
Func­tion
int­erface g0/1
global config
enters interface config for Gigabit Ethernet 0/1
ip address IP/prefix
interface config
sets interf­ace's IPv4 address
no shut
interface config
turns on the interface
des­cri­ption descr­iption text
interface config
used to document info about the interface
ipv6 address IP/prefix
interface config
sets interf­ace's IPv6 address
ipv6 address IP/prefix link-local
interface config
sets interf­ace's IPv6 link-local address
ipv6 unicast-routing
global config
enables IPv6 routing
                       
 

Comments

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