What is the default port security setting on a switch port?

The default configuration of a Cisco switch has port security disabled. If you enable switch port security, the default behavior is to allow only 1 MAC address, shutdown the port in case of security violation and sticky address learning is disabled. Next, we will enable dynamic port security on a switch.

What is port security on a switch?

Port Security helps secure the network by preventing unknown devices from forwarding packets. … Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted. You can enable port security on a per port basis.

Is port security enabled by default?

By default, a port security violation forces the interface into the error-disabled state. An administrator must re-enable the port manually by issuing the shutdown interface command followed by no shutdown .

How do I configure port security on a switch?

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.
IT IS INTERESTING:  How do I turn on system integrity protection on Mac Catalina?

What is the primary feature of port security on a switch?

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 are the three types of port security?

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

How does port security identify a device?

Port security uses the MAC address to identify allowed and denied devices. By default, port security allows only a single device to connect through a switch port. You can, however, modify the maximum number of allowed devices.

How do I check my port-security violation?

Here is a useful command to check your port security configuration. Use show port-security interface to see the port security details per interface. You can see the violation mode is shutdown and that the last violation was caused by MAC address 0090.

What are common causes of port-security violations?

A security violation occurs if the maximum number of secure MAC addresses have been added to the address table and the port receives traffic from a MAC address that is not in the address table. You can configure the port for one of three violation modes: protect, restrict, or shutdown.

Which device would you use to configure port security?

What can you do? Configure port security on the switch. You’ve just enabled port security on an interface of a Catalyst 2950 switch. You want to generate an SNMP trap whenever a violation occurs.

IT IS INTERESTING:  Which of the following best describes the primary purpose for the formation of the Department of Homeland Security?

How do I enable port security on an interface?

You can configure all secure MAC addresses by using the switchport port-security mac-address mac_address interface configuration command. You can allow the port to dynamically configure secure MAC addresses with the MAC addresses of connected devices.

Why would a network administrator configure port security on a switch?

A network administrator would configure port security on the switch in order to prevent unauthorized hosts from accessing the LAN. This is the main reason why port security is being used in the switch. The feature is used to restrict input to an interface with the help of limiting and.

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 switch port security and violations?

Switch port security limits the number of valid MAC addresses allowed on a port. … 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.

IT IS INTERESTING:  Do I need to renew my antivirus software?