Basic Switch Commands to Remember for the CCENT Certification Exam

By Glen E. Clarke

Part of CCENT Certification All-In-One For Dummies Cheat Sheet

This section outlines some of the popular commands you use on a Cisco switch for the CCENT certification exam. Most of the basic router commands, such as setting passwords and banners, work on the switch.

Command(s) / Result
Switch#show mac-address-table

Used to display the MAC address table on the switch.

Switch>enable
Switch#config term
Switch(config)#hostname
NY-SW1

NY-SW1(config)#

Used to change the hostname on the switch.

NY-SW1>enable
NY-SW1#config term
NY-SW1(config)#interface
vlan1

NY-SW1(config-if)#ip address 23.0.0.25
255.0.0.0

NY-SW1(config-if)#no shutdown
NY-SW1(config-if)#exit
NY-SW1(config)#ip default-gateway
23.0.0.1

Configures the switch for an IP address so that you can
remotely connect to the switch and manage it. Also notice that the
default gateway is set. If you do not set the default gateway, you
will be unable to manage the switch from a different network.

Switch>enable
Switch#config term
Switch(config)#interface f0/5
Switch(config-if)#speed 100
Switch(config-if)#duplex full
Switch(config-if)#description Web
Server

Switch(config-if)#no shutdown

These commands are used to manually configure a port for 100
Mbps, full duplex, and assigns a description to the port. The port
is then enabled with the no shutdown
command.

Switch(config-if)#shutdown

Disables the port.

SW1>enable
SW1#config term
SW1(config)#interface f0/6
SW1(config-if)#switchport mode
access

SW1(config-if)#switchport
port-security

SW1(config-if)#switchport port-security
mac-address sticky

SW1(config-if)#switchport port-security
maximum 1

SW1(config-if)#switchport port-security
violation shutdown

This group of commands configures port security on port #6.
Port security is a way to limit which systems can connect to a
switch. This code example uses a “sticky” MAC address that tells
the switch to configure the port for whatever MAC uses the port
first. It then sets the maximum number of MACs for the port to 1
and shuts down the port if there is a violation.

show port-security address

Show the MAC addresses that have been configured for each
port.

show port-security interface
f0/6

Show the configuration of port security on port 6.

Switch>enable
Switch#vlan database
Switch(vlan)#vlan 2 name
Executives

VLAN 2 added:
Name: Executives
Switch(vlan)#exit

Configures a VLAN named Executives in the VLAN database.

Switch#show vlan

Display a list of VLANs.

Switch(config)#interface range f0/6 –
9

Switch(config-if-range)#switchport access
vlan 2

Place ports 6–9 in the newly created VLAN 2.