Packet Tracer Cheat Sheet

A Programming › Nope cheat sheet in English by carter.fendley

Work in progress cheatsheet for Packet Tracer.

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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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