1. Shutdown. The port shuts down when the maximum number of secure MAC addresses is exceeded.
What is the default action of port security on the interface?
The interface keyword enables you to clear all secure addresses on an interface. This example shows how to enable port security on Fast Ethernet port 12 and how to set the maximum number of secure addresses to 5. The violation mode is the default, and no secure MAC addresses are configured.
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 are the three types of port security?
On Cisco equipment there are three different main violation types: shutdown, protect, and restrict.
What are the steps to configure port security?
To configure port security, three steps are required:
- define the interface as an access interface by using the switchport mode access interface subcommand.
- enable port security by using the switchport port-security interface subcommand.
What is the command in disabling unused switch ports?
Disable Unused Ports
Navigate to each unused port and issue the Cisco IOS shutdown command. If a port later on needs to be reactivated, it can be enabled with the no shutdown command.
Why is switch port security overlooked?
One of the most overlooked security areas is the configuration of individual switchport security configuration. The reason may be that it requires a more granular configuration; this is because a typical configuration requires the knowledge of the specific MAC address(es) that will be connecting to each switchport.
Why should you implement port security on a switch interface?
The main reason to use port security in a switch is to stop or prevent unauthorized users to access the LAN. … To stop unauthorized telnet or SSH access to a management interface the switch must be secured with passwords at the command line, with the VTY console command.
Can we configure port security on trunk ports?
Port security supports trunks. –On a trunk, you can configure the maximum number of secure MAC addresses both on the trunk and for all the VLANs on the trunk. –You can configure the maximum number of secure MAC addresses on a single VLAN or a range of VLANs.
What is port security violation?
If the maximum number of secure MAC addresses has been reached, a security violation occurs when a devices with a different MAC addresses tries to attach to that port. In most of today’s scenarios when the switch detects a security violation, the switch automatically shuts down that port.
Which of the following is the command to configure the maximum number of MAC addresses on a switch port?
On each interface that uses port security, specify the maximum number of MAC addresses that will be allowed access using the following interface configuration command: Switch(config-if)#switchport port-security maximum max-addr By default, only one MAC address will be allowed access on each switch port.
What is the benefit of port security?
Port Security Benefits
Allows for limiting the number of MAC addresses on a given port. Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted. Enabled on a per port basis. When locked, only packets with allowable MAC address will be forwarded.
What is the purpose of port security?
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.