Port security is a layer two traffic control feature on Cisco Catalyst switches. It enables an administrator configure individual switch ports to allow only a specified number of source MAC addresses ingressing the port.
Thereof, what are the port security violation modes?
Switchport Violations On Cisco equipment there are three different main violation types: shutdown, protect, and restrict. 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.
Similarly, what is port security aging? Switchport Security Aging This provides for a MAC address to be removed from being learned after a configured amount of time. Inactivity—When using this method, secure MAC addresses are deleted only if the secure MAC address is inactive for a specific aging time.
Beside this, how do you show port security?
To display the port security configuration on an interface, use the show port-security command.
Which two features are compatible with port security?
A port configured with the switchport mode dynamic interface configuration command. You must set the maximum allowed secure addresses on the port to two plus the maximum number of secure addresses allowed on the access VLAN. Note.
| Type of Port or Feature on Port | Compatible with Port Security |
|---|---|
| Flex Links | Yes |
14 Related Question Answers Found
Is a dynamic port?
dynamic port – Computer Definition A port that can be used by any computer application program to communicate with any other application program running Transmission Control Protocol (TCP) or User Datagram Protocol (UDP), with no registration requirements. Dynamic ports are numbered from 49,152 through 65,535.
Which device would you use to configure port security?
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 dynamic port security?
Port security defaults use dynamically learned MACs or “sticky” MAC addresses which are always only stored in the running config unless the “static” is entered instead or the running config is saved to the startup config once the MAC is learned.
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 Switchport mode access used for?
Using the “Switchport mode access” command forces the port to be an access port while and any device plugged into this port will only be able to communicate with other devices that are in the same VLAN. Using the “Switchport mode trunk” command forces the port to be trunk port.
What does Switchport protected do?
switchport protected is used to enforce privacy within a vlan the command prevents ports from talking to other ports configured with switchport protected . This command reduces flooding as a side-effect of using it on all ports in a Vlan, but it does much more than “just” remove flooding from a switchport.
Which command disables DTP?
Use switchport nonegotiate command under that port to disable DTP.
How do I turn on Switchport port security?
1) Your switch interface must be L2 as “port security” is configure on an access interface. 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.
What is spanning tree used for?
The Spanning Tree Protocol (STP) is a network protocol that builds a loop-free logical topology for Ethernet networks. The basic function of STP is to prevent bridge loops and the broadcast radiation that results from them.
What is no shut command?
The no shutdown command enables an interface (brings it up). This command must be used in interface configuration mode. It is useful for new interfaces and for troubleshooting. This command can be abbreviated no shut.
What is VLAN in networking?
A virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2). VLANs allow network administrators to group hosts together even if the hosts are not directly connected to the same network switch.
Why is port security important?
Port security is vital because marine transport is a very thriving and extensively used form of conveyance, especially for cargo transportation. Port security helps to solve these problems of inaccessibility and thereby reduces the cargo pilferage that takes place.
What is aging time?
the aging time is the timer that decides how long a non speaking MAC address is stored in the CAM table before purging it. the CAM table is the table where the associations MAC address, Vlan, port are stored.
What is MAC aging time?
The MAC aging time specifies the time before an entry ages and is discarded from the MAC address table. The range is from 0 to 1000000; The default value is 300 seconds. Entering the value 0 disables MAC aging. If a VLAN is not specified, the age specification applies to all VLANs.