Configuration Steps:

1. Your switch interface must be L2 as “port security” is configure on an access interface.
2. Then you need to enable port security by using the “switchport port-security” command.
3. This step is optional, but you can specify how many MAC addresses the switch can have on one interface at a time.

How do I enable ports on a Cisco 3560 switch?

Lab Steps

1. On the Network Visualizer screen, double-click on 3560 Switch A.
2. Press enter and the Switch> prompt will appear.
3. Change to the privileged mode.
4. Change to the global configuration mode.
5. Type interface? to see all the interfaces available on the router.
6. The 3560 switch has eight Fast Ethernet 10/100BaseT ports.

Which command will enable port security?

Use the switchport port-security command to enable port-security. I have configured port-security so only one MAC address is allowed. Once the switch sees another MAC address on the interface it will be in violation and something will happen.

What does the Switchport port security command do?

The switchport security feature (Port Security) is an important piece of the network switch security puzzle; it provides the ability to limit what addresses will be allowed to send traffic on individual switchports within the switched network.

What is Cisco port security?

Port security is a layer two traffic control feature on Cisco Catalyst switches. It enables an administrator configure individual switch ports to allow only a specified number of source MAC addresses ingressing the port.

How does Cisco port security work?

Port Security helps secure the network by preventing unknown devices from forwarding packets. When a link goes down, all dynamically locked addresses are freed. The port security feature offers the following benefits: You can limit the number of MAC addresses on a given port.

What is the purpose of the no Switchport command on a 3560 Catalyst switch?

The no switchport command puts the interface in L3 mode (known as “routed port”) and makes it operate more like a router interface rather than a switch port. The ip address command assigns an IP address and network mask to the interface.

What are the three types of port security?

On Cisco equipment there are three different main violation types: shutdown, protect, and restrict.

How do you show port security?

To check and analyze the port security configuration on switch, user needs to access privilege mode of the command line interface. ‘show port-security address’ command is executed to check the current port security status.

What is Switchport command Cisco?

You only use the switchport command on switches—not routers. It can put a port into trunk mode, into a certain VLAN, or even to set port security. Its most common use is to configure an interface to connect to an access device (e.g., workstation, server, printer, etc.).

How is port port security configured and enabled?

Port security is either autoconfigured or enabled manually by specifying a MAC address. If a MAC address is not specified, the source address from the incoming traffic is autoconfigured and secured, up to the maximum number of MAC addresses allowed. These autoconfigured MAC addresses remain secured for a time, depending upon the aging timer set.

How many MAC addresses can I set to secure on a port?

You can set the number of MAC addresses to secure on a port. By default, at least one MAC address per port can be secured. In addition to this default, a global resource of up to 1024 MAC addresses is available to be shared by the ports.

How do I clear port security on a MAC address?

Secure address age time set to 600 minutes for port 4/7. Enter the clear port security command to clear MAC addresses from a list of secure addresses on a port. Note If you enter the clear command on a MAC address that is in use, the network may relearn that MAC address and make the MAC address secure again.

How do I configure port 2/2 to restrict traffic from Mac-1?

For example, if you configure MAC-1 as the secure MAC address on port 2/1 and MAC-2 as the secure MAC address on port 2/2 and then connect the station with MAC-1 to port 2/2 when port 2/2 is configured for restrictive mode, port 2/2 shuts down instead of restricting traffic from MAC-1.