- Protect: – This mode will only work with sticky option. …
- Restrict: – In restrict mode frames from non-allowed address would be dropped. …
- Shutdown: – In this mode switch will generate the violation alert and disable the port. …
- Switch(config)# errdisable recovery cause psecure-violation.
What are three types of action that can be set for port security violation?
You can configure the port for one of three violation modes:
protect, restrict, or shutdown
. See the “Configuring Port Security” section on page 62-5. To ensure that an attached device has the full bandwidth of the port, set the maximum number of addresses to one and configure the MAC address of the attached device.
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 secure a port?
- 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 are port security violation modes?
You can configure the port for one of three violation modes:
protect, restrict, or shutdown
. See the “Configuring Port Security” section. To ensure that an attached device has the full bandwidth of the port, set the maximum number of addresses to one and configure the MAC address of the attached device.
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.
How do you show port security violations?
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 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.
Can we configure port security on trunk ports?
Configuring Trunk Port Security
When a trunk port security violation occurs, the
trunk port is shut down
and an SNMP trap may be generated. Trunk port security is also supported on private VLAN trunk ports.
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.
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.
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.
How do I enable ports after security violation?
One method to enable back an interface, after a Port Security violation related shutdown (Errdisable state) is
to bring the interface down and again up by issuing the commands “shutdown” and “no shutdown”
. Other method is to bring up the switch port automatically after a period of time in Errdisable state.
Port security blocks unauthorized access by
examining the source address of a network device
.
Which subcommand overrides the default action to take upon a security violation?
4. (Optional) Use the switchport port-security violation {protect | restrict |
shutdown
} interface subcommand to override the default action to take upon a security violation (shutdown).
