Switchport Violations
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.
Which port security violation mode is the default?
Shutdown – In this (default) violation mode, a port security violation causes the interface to immediately become error-disabled and turns off the port LED.
What are the port security violation modes?
You can configure the port for one of three violation modes: protect, restrict, or shutdown.
Which port security violation mode is the default quizlet?
What is the default violation mode? Shutdown.
When can a port security violation occur on a switch?
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.
What are the 3 port security violation modes for a switch?
Switchport Violations
On Cisco equipment there are three different main violation types: shutdown, protect, and restrict.
What is port security on a switch?
Overview. 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.
How do you show port security violations?
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).
Which port security violation mode does not increase violation counter?
If the switch port-security violation mode “protect” is enabled, packets coming from the violating hosts at the port-security process level but does not increment the security-violation count. And, if the “shutdown” mode is enabled, the port will go into shutdown mode.
Which security violation mode on a switch will discard offending traffic?
Port Security violation type that discards offending traffic, sends log messages, and increments the violation counter, and err-disables the interface.
Which subcommand overrides the default action to take upon a security violation?
(Optional) Override the default action to take upon a security violation (shutdown) using the switchport port-security violation {protect | restrict | shutdown} interface subcommand.
What are the different types of port security?
Port security implements two traffic filtering methods, dynamic locking and static locking. These methods can be used concurrently. Dynamic locking. You can specify the maximum number of MAC addresses that can be learned on a port.
How do I reset my security violation count?
You can clear the counter by going into configure terminal, the interface, and flipping port security off then on. this will clear the counters without having to do a restart.
What is show port security?
To check and analyze the port security configuration on switch, user needs to access privilege mode of the command line interface. ‘show port-security address’ command is executed to check the current port security status.
Why would you enable port security on a switch?
The main reason to use port security in a switch is to stop or prevent unauthorized users to access the LAN.
What is the default action of port security on the interface when the maximum number of MAC address is exceeded?
Default Port Security Configuration
Shutdown. The port shuts down when the maximum number of secure MAC addresses is exceeded.
Which of the following is a difference between Telnet and SSH as supported by a Cisco switch?
SSH encrypts all the communication while Telnet encrypts only the user name and password for login. SSH and Telnet provide the same function, the only difference is the port number.
What is the name of the process that is defined by IEEE 802.1 Q to relay traffic from multiple VLANs?
What is the name of the process that is defined by IEEE 802.1Q to relay traffic from multiple VLANs? vlan tagging.
Which command enables a port on a switch quizlet?
You first navigate to the port you wish to enable, and then you can use the no shutdown command to enable a port.
How do I disable a port on a Cisco switch?
On a cisco switch such as a catalyst 2900 & 3500 series switches, you can just shut the port down. It treats each port as a fast ethernet interface, so just log into the switch, go to interface configuration, and then do a shut. This will work for most stackable cisco switches. Hope this helps.
How do I remove a port security MAC address?
Use undo port-security mac-address security to remove a secure MAC address.
Usage guidelines
- Enable port security on the port.
- Set the port security mode to autoLearn.
- Configure the port to permit packets of the specified VLAN to pass or add the port to the VLAN. Make sure the VLAN already exists.
What is the switch port security maximum allowed command work?
Switchport Security Violations
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 I check my 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).
What is port violation?
The Cisco port security violation mode is a port security feature that restricts input to an interface when it receives a frame that breaks the port security settings on the said interface.
Which switch port security violation provides logs?
The restrict and shutdown options send log messages when a violation occurs. Shut down mode also shuts down the port. The status code of err-disabled means that the security violation occurred on the port.
Which subcommand overrides the default action to take upon a security violation?
(Optional) Override the default action to take upon a security violation (shutdown) using the switchport port-security violation {protect | restrict | shutdown} interface subcommand.
What is trunk port on switch?
A trunk port is a type of connection on a switch that is used to connect a guest virtual machine that is VLAN aware. Generally, all frames that flow through this port are VLAN tagged. The exception to this is when a trunk port is granted access to the untagged VLAN set (native VLAN ID).
What is trunk mode in VLAN?
A trunk is a point-to-point link between one or more Ethernet switch interfaces and another networking device such as a router or a switch. Ethernet trunks carry the traffic of multiple VLANs over a single link, and you can extend the VLANs across an entire network.
How do I reset my Cisco security violation count?
You can clear the counter by going into configure terminal, the interface, and flipping port security off then on. this will clear the counters without having to do a restart.
What is port security in Cisco switch?
Overview. 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 different ways you can secure using the port security?
Port security implements two traffic filtering methods, dynamic locking and static locking. These methods can be used concurrently. Dynamic locking. You can specify the maximum number of MAC addresses that can be learned on a port.
Which attacks can be mitigated by using port security on a switch?
Get rid of the MAC flooding attacks on your switch and all kinds of other attacks that will mitigate you network security by implementing switch port security.
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.
Why would you enable port security on a switch?
The main reason to use port security in a switch is to stop or prevent unauthorized users to access the LAN.
Which type of switch memory is used to store the configuration used by the switch when it is up and working?
The NVRAM (Non-Volatile RAM) stores the start-up configuration file.
Which port is used for Telnet?
The default port for Telnet client connections is 23; to change this default, enter a port number between 1024 and 32,767.