Basic Switch Commands to Remember for the CCENT Certification Exam

Part of the 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.
  • Add a Comment
  • Print
  • Share
blog comments powered by Disqus
Advertisement

Inside Dummies.com