What is the default port security violation?

These are described in more detail below: 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.

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 causes port security violation?

A security violation occurs when the maximum number of MAC addresses has been reached and a new device, whose MAC address is not in the address table attempts to connect to the interface or when a learned MAC address on an interface is seen on another secure interface in the same VLAN.

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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. cc0e.

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.

What are the three types of port security?

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

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.

How do I disable port security?

To disable port security aging for all secure addresses on a port, use the no switchport port-security aging time interface configuration command.

Which two of the following switch port violation modes will alert you via SNMP that a violation has occurred on a port?

Shutdown and protect mode will alert you via SNMP that a violation has occurred on a port.

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).

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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.

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.

Which option is the default Switchport 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.