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Cisco Packet Tracer

Switch and End Device Configuration

IOS CLI Main Command Modes

Switch to privileged mode

enable


Switch from privileged to user mode

disable


Enter global configuration mode

configure terminal


Exit global configuration mode

exit


Enter line sub-configuration mode

line console 0
# line LINE_TYPE NUMBER_OR_RANGE

  • LINE TYPE: Defines the type of access you want to configure. Common values are:

    • console: For direct access via the console port.
    • aux: For access via the auxiliary port.
    • vty: For remote access via SSH or Telnet.

  • LINE NUMBER | RANGE: Specifies the line number or range of lines you want to configure.

    • For example, console 0, aux 0, or vty 0 4.


Return to enable mode

end


Access contextual help

?


View the clock

show clock


Set the clock

clock set 16:20:00 22 Feb 2030


Assign a hostname

hostname NAME


Set a Console User Password

line console 0
password PASSWORD
login

line vty 0 15
password PASSWORD
login


Set a Privileged Console Password

enable secret PASSWORD

enable secret stores the password in hashed form, offering more security than enable password, which stores it in plain text.

Tip

The startup-config and running-config files display stored passwords in plain text, which is a security risk. To encrypt them, use the command service password-encryption.


Set a warning message

configure terminal
banner motd #Authorized Access Only#


There are two system files that store device configuration:

  • Startup-config: configuration saved in NVRAM used at startup.
  • Running-config: active configuration in RAM, lost upon power-off.

To save the current configuration to the startup file, run copy running-config startup-config in privileged mode.


Restart the router or switch.

reload


Erase the saved configuration to start with the default settings.

erase startup-config


View the status of interfaces

Router# show ip interface brief

Interface              IP-Address      OK? Method Status     Protocol
GigabitEthernet0/0     192.168.1.1     YES manual up         up
GigabitEthernet0/1     unassigned      YES unset  administratively down down
Serial0/0              10.1.1.1        YES manual up         up
Serial0/1              unassigned      YES unset  down       down
Loopback0              192.168.0.1     YES manual up         up

Hot Keys and Shortcuts

01 02

Configure an SVI on a Switch

configure terminal
interface vlan 1
ip address 192.168.1.20 255.255.255.0
no shutdown
exit
ip default-gateway 192.168.1.1