Shutdown – When a violation occurs in this mode, the switchport will be taken out of service and placed in the err-disabled state. The switchport will remain in this state until manually removed; this is the default switchport security violation mode.
Which option is the default switch port security violation mode?
Explanation: Shutdown–This mode is the default violation mode; when in this mode, the switch will automatically force the switchport into an error disabled (errdisable) state when a violation occurs.
What are the three 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 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.
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 .
What is the default action of port security on the interface when the maximum number of MAC address is exceeded?
MAC Limit on Untrusted Ports
You can also choose to configure the action to take when the number of MAC addresses on the untrusted ports exceeds the configured limit. By default, the MAC limit option for a port is disabled.
How do I check my 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. cc0e.
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.
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.
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 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 triggers 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. … Packets that have a matching MAC address (secure packets) are forwarded; all other packets (unsecure packets) are restricted.
How do I enable port security?
You can make your L3 switch port to an access interface by using the “switchport” command. 2) Then you need to enable port security by using the “switchport port-security” command. This can also be applied in a range of the interfaces on a switch or individual interfaces.