What is Switchport port security violation?
A switchport violation occurs in one of two situations: When the maximum number of secure MAC addresses has been reached (by default, the maximum number of secure MAC addresses per switchport is limited to 1) An address learned or configured on one secure interface is seen on another secure interface in the same VLAN.
How do we see a port security violation?
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. 5023 (H1).
How do I turn on Switchport 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 difference between the restricted and protected port security violation modes?
protect – This mode drops the packets with unknown source mac addresses until you remove enough secure mac addresses to drop below the maximum value. restrict – This mode performs the same function as protecting, i.e drops packets until enough secure mac addresses are removed to drop below the maximum value.
What are 3 options if there is security violation in Switchport?
You can configure the port for one of three violation modes: protect, restrict, or shutdown.
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.
What are common causes of port security violations?
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.
When a port security violation occurs what happens next by default?
When a port security violation occurs, what happens next by default? All future incoming, traffic on that port is discarded from the violating MAC addresses.