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

Used to change the hostname on the switch.
NY-SW1#config term
NY-SW1(config)#interface vlan1
NY-SW1(config-if)#ip address
NY-SW1(config-if)#no shutdown
NY-SW1(config)#ip default-gateway

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#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.

Disables the port.
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#vlan database
Switch(vlan)#vlan 2 name Executives
VLAN 2 added:
Name: Executives

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.