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Packet Tracer Cheat Sheet by

Work in progress cheatsheet for Packet Tracer. If you see any errors or have any improvements email: carter.fendley@gmail.com
packettracer

Notes

How to use this cheat sheet
In order to use the commands you MUST be in the mode that that command is listed under. The sections are listed in order progre­ssion. "User EXEC Mode" is the default mode and thus has no command to enter it.

Example: In order to use the hostname command I must be in "­Global Config Mode" so I look one section before to look up the command to enter "­Global Config Mode". I then see that in order to use the configure terminal command I must be in "­Pri­vileged EXEC Mode" and to enter "­Pri­vileged EXEC Mode" I must use the command enable in "User EXEC Mode". This would give this string of commands: enable > configure terminal > hostname <ho­stn­ame­>

When in doubt google
If you are asked to do something that is not on this cheat sheet google it. For example if you are asked to deny all incoming inform­ation from a IP google "How to deny incoming IP cisco packet tracer­"

Command conven­tions
When you see a command like ip address <ip> <su­bne­t>, the <i­p> and <s­ubn­et> part mean that in order to use this command you need to substitute inform­ation into those places.

Example: If I wanted to set the IP to 192.1­68.1.1 with a subnet mask of 255.2­55.2­55.0 I would fully replace both the <i­p> and <s­ubn­et> sections with that inform­ation. I would end up with a command that looks like: ip address 192.16­8.1.1 255.25­5.2­55.0

Desktops

Over­view
Desktops do not have a router or switch like CLI. In order to configure settings on desktops you must click on them and then navigate to the "­Des­kto­p" tab. Here you can use the different apps to preform different operat­ions. See below for specific operations help.

Setting an IP
Click on the "­Con­figure IP" desktop app. Here you can input IPv4 and IPv6 addresses as well as other networking inform­ation. When you are done you can simply exit out and it will be saved.

Navi­gating to a web page
Use the "Web Browse­r" app as you would a normal web brouser

Pinging IPs
Use the "­Command Prompt­" app and use the command ping <ip­> in order to see if a host is up.

How to tell what mode you are in

User EXEC Mode
Route­r>
Privileged EXEC Mode
Router#
Global Config Mode
Router (config)#
Iterface Config Mode
Router (confi­g-if)#
Line Config Mode
Router (confi­g-l­ine)#
 

Universal Commands

Exit the current mode
exit

User EXEC Mode Commands

Enter Privileged EXEC Mode
enable

Privileged EXEC Mode

Enter Global Config Mode
configure terminal
Save current config
copy runnin­g-c­onfig startu­p-c­onfig
Save current config
write memory
Show running config
show runnin­g-c­onfig
List all interfaces
show ip interface brief
List all interface inform­ation
show interface
List all show parameters
show ?
List all debug parameters
debug ?

Global Config Mode

Enter Interface Config Mode
interface <in­ter­fac­e> <po­rt>
Enable IPv6
ipv6 unicas­t-r­outing
Set Defualt Gateway
ip defaul­t-g­ateway <ga­tew­ay>
Set Hostname
hostname <ho­stn­ame­>
Enter Line Config Mode
line <li­ne> <st­art­por­t> <en­dpo­rt> (lines: console, vty)
Enable Secret Password
enable secret <pa­ssw­ord­>
MOTD
banner motd #<m­otd­>#
Enable Password Encryption
service passwo­rd-­enc­ryp­tion
Add new user
username <us­ern­ame> secret <pa­ssw­ord­>
Enable AAA
aaa new-model
Populate defualt AAA method list
aaa authen­tic­ation login defualt <me­tho­d> <me­tho­d1> <me­tho­dN> (see methods below)
Populate new AAA method list
aaa authen­tic­ation login <li­st-­nam­e> <me­tho­d> <me­tho­d1> <me­tho­dN> (see methods below)
Set max fails AAA
aaa local authen­tic­ation maxfail <ma­xfa­il>
AAA Auth Methods
enable - uses enable password
krb5 - uses Kerberos 5
krb5-­telnet - uses Kerberos 5 Telnet protocol
line - uses line password
local - uses local username database
local­-case - uses local username database (case-­sen­sitive)
none - no authen­tic­ation (don't do this)
cache <group name> - uses cache server group
group radius - uses list of all RADIUS servers
group tacacs+ - uses list of all TACACS+ servers

Interface Config Mode

Set Static IPv4
ip address <ip> <su­bne­t>
Set Static IPv6
ipv6 address <ip­v6>
Set IPv6 Link Local
ipv6 address <ip­v6> link-l­ocal
Set duplex to auto
duplex auto
NOTE: When exiting Interface Config Mode you must issue the command no shutdown before exit if you wish for the interface to remain up.

Line Config Mode

Set password (user EXEC)
password <pa­ssw­ord­>
Enable password checking at login
login
Enable defualt AAA list
login authen­tic­ation default
Enable AAA list
login authen­tic­ation <list name>

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