Sticky MAC is a port security feature that dynamically learns MAC addresses on an interface and retains the MAC information in case the Mobility Access Switch reboots.
What is switchport port-security sticky and how to enable it?
switchport port-security – enables port security, optional “maximum <n>” to set the max greater than 1 switchport port-security mac-address sticky – turns on the sticky MAC feature After enabling, you will notice the currently connected MAC address (es) will appear in the running config: switchport port-security mac-address sticky 0080.6433.xxxx
What is the difference between Port Security with sticky MAC addresses?
"Port security with sticky MAC addresses provides many of the same benefits as port security with static MAC addresses, but sticky MAC addresses can be learned dynamically. Port security with sticky MAC addresses retains dynamically learned MAC addresses during a link-down condition.
How do I enable port security on a switchport port?
The solution to this is to use the sticky option on the port security interface command: [more] switchport port-security – enables port security, optional “maximum <n>” to set the max greater than 1. switchport port-security mac-address sticky – turns on the sticky MAC feature.
What is the difference between static and dynamic port security?
Difference between static and dynamic port security is that you statically configure secure static secure MAC addresses (by using switchport port-security mac-address static {mac-address}) and with dynamic MAC addresses (configured by using switchport port-security) port security learns secure MAC addresses dynamically. Hope it helps, USA_firefly
What is the use of sticky in port security?
Sticky – This is not a violation mode. By using the sticky command, the user provides static Mac address security without typing the absolute Mac address. For example, if user provides a maximum limit of 2 then the first 2 Mac addresses learned on that port will be placed in the running configuration.
What is the difference between sticky and dynamic port security?
Dynamic secure MAC addresses – are dynamically learned by the switch and stored in its MAC address table. They are removed from the configuration when the switch restarts. Sticky secure MAC addresses – like Dynamic secure MAC addresses, MACs are learned dynamically but are saved in the running configuration.
What are the three types of port security?
You can configure the port for one of three violation modes: protect, restrict, or shutdown.
What does sticky mean in Cisco?
Sticky – Sticky secure MAC addresses are a hybrid. They are learned dynamically from the devices connected to the switchport, are put into the address table AND are entered into the running configuration as a static secure MAC address (sometimes referred to as a static sticky MAC address).
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.
What is dynamic port security?
With Dynamic port configuration enabled, a user can plug in any device such as Access Points, Security Cameras, and VoIP devices to the switch ports, and the appropriate port profiles will be configured to allow network access without manual intervention.
Why port security is important?
Prevents Thieves from Stealing Goods. Since shipping containers cannot be manned at all times, port security is essential for keeping goods safe from thieves. Some areas of ports are inaccessible for human patrol, but other security measures can protect these items from thieves.
Where are sticky MAC addresses stored?
running configurationSticky secure MAC addresses—This type of secure MAC address can be manually configured or dynamically learned. These types of addresses are kept in an address table and in the running configuration.
How do I set up 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.More items...
What does sticky MAC address in port security do?
Overview. Persistent (Sticky) MAC is a Layer 2 port security feature that prevents unauthorized devices from connecting to your network. When this feature is enabled, the switch will observe the incoming source MAC addresses on a configured port and dynamically learn/save this address to memory.
What is the purpose of the Switchport port security and MAC address sticky command?
switchport port-security mac-address sticky The administrator specifies a maximum of 4 MAC addresses, manually configures one secure MAC address, and then configures the port to dynamically learn additional secure MAC addresses up to the 4 secure MAC address maximum.
What is Switchport port security maximum?
1The default "switchport port-security maximum" value for the port is "1".
What does Switchport port security MAC address sticky do?
Requirement: Sticky MAC is a port security feature that dynamically learns MAC addresses on an interface and retains the MAC information in case the Mobility Access Switch reboots.
Is a dynamic port?
A dynamic port -- also called a private port -- is one that is assigned to a process or service at the time the port is needed, usually when the process or service is started. When assigning dynamic ports, the OS can use any ports available from the range of ports designated for this purpose.
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 is the switch port security maximum allowed command work?
The default "switchport port-security maximum" value for the port is "1". So unless you change this value to "2" your port can sense max. 1 MAC address in either vlan "access" or "voice" ONLY without triggering violation.
How to configure a sticky port?
There are two ways to configure a sticky port. The first way being that you configure a static MAC address when configuring port-security on a specific interface. The next way which is more convenient is to configure a “ Sticky ” MAC address and leave the max MAC addresses to its default value of one. When port-security is configured this way, the first MAC address learned on the switch port will be automatically statically configured into the running-configuration as if you manually specified the MAC address.
What is static port security?
Static port security is a common configuration for printers, copiers and other devices on the network that never change. This lab will discuss and demonstrate the configuration and verification of “Sticky” switchport security.
How to enable port security on SW1?
Step 1. – Enable port-security on SW1’s Fa0/1 interface and configure the interface to sticky the MAC address learned. Upon a port security violation, protect the port. Verify your configuration.
Why switch 1841 router to WRT54G?
For example you have a small site location with a 1841 router and a 3560-8pc switch and an end user gets the bright idea to swap the 1841 with a WRT54G because he wants wireless and wired network connectivity.
What does sticky method do?
Sticky method will learn the Host's MAC address automatically once any host is connected to the port.
Do you need to use "sticky" in Mac?
The difference is in the purpose of the command itself. You do not need "sticky" option if you are going to configure the mac-address manually. The main reason you have the option is to 'stick' the dynamically learned mac-address to the port.
Can you run CAT3K sticky?
In some platforms (eg. in 3650 running (CAT3K_CAA-UNIVERSALK9-M), Version 03.07.01E ) you are not even allowed to run "sticky" with manually assigned MAC addresses.
Can you connect 5 devices to a port?
That is correct, you will allow different kind of devices to be connected to the port until the maximum MAC address allowed is completed. For example if you set up maximum of 5 under a port, you can connect 5 different devices on that port, a 6th device could disable the port or just send a message to inform, it depends of the type of violation configured.
Does a rouge switch with STP cause damage?
All my access ports have bpdu guard, so rouge switch with STP is unlikely to cause damage.
Can you specify MAC address with sticky command?
I dont see any functional different between the two specifications of MAC addresses, however Cisco recommends against specifying a MAC address with the sticky command. I have also heard that with newer versions of IOS the option is removed, but I cant confirm first hand.
How does port security work?
You can use the port security feature to restrict input to an interface by limiting and identifying MAC addresses of the stations allowed to access the port. When you assign secure MAC addresses to a secure port, the port does not forward packets with source addresses outside the group of defined addresses.
What happens when a port is configured as a secure port?
If a port is configured as a secure port and the maximum number of secure MAC addresses is reached, when the MAC address of a station attempting to access the port is different from any of the identified secure MAC addresses, a security violation occurs. Also, if a station with a secure MAC address configured or learned on one secure port attempts to access another secure port, a violation is flagged.
How many secure addresses can you set on a port?
This example shows how to enable port security on a port and to set the maximum number of secure addresses to 50 . The violation mode is the default, no static secure MAC addresses are configured, and sticky learning is enabled.
What happens if sticky learning is disabled?
If sticky learning is disabled, the sticky secure MAC addresses are converted to dynamic secure addresses and are removed from the running configuration.
How to configure static secure MAC address?
Static secure MAC addresses—These are manually configured by using the switchport port-security mac-address mac-address interface configuration command, stored in the address table, and added to the switch running configuration.
What is an address learned or configured on one secure interface?
An address learned or configured on one secure interface is seen on another secure interface in the same VLAN.
When a trunk port configured with port security and assigned to an access VLAN for data traffic and to a voice?
When a trunk port configured with port security and assigned to an access VLAN for data traffic and to a voice VLAN for voice traffic, entering the switchport voice and switchport priority extend interface configuration commands has no effect.
How to secure port?
Port can be secure from interface mode. Use enable command to move in Privilege Exec mode. From Privilege Exec mode use configure terminal command to enter in Global Configuration mode. From global configuration mode enter in specific interface.
What software to use to switch port security?
To explain Switchport port security modes and commands, I will use packet tracer network simulator software . You can use any network simulator software or can use a real Cisco switch to follow this guide. There is no difference in output as long as your selected software contains the commands explained in this tutorial.
What port is PC0 connected to?
In our topology PC0 is connected with F0/1 port of switch. Enter following commands to secure F0/1 port.
How to define mac address in static method?
In static method we have to manually define the exact mac address of host with switchport port-security mac-address MAC_address command. This is the most secure method but requires a lot of manual works.
What is sticky feature in dynamic method?
In dynamic method we use sticky feature that allows interface to learn mac address automatically. Interface will learn mac addresses until it reaches maximum number of allowed hosts.
How to assign static IP address?
Click Server0 and click Desktop and click IP Configuration and select Static from radio options and assign IP address (10.0.0.100) and subnet mask (255.0.0.0)
What is restrict mode?
Restrict: - In restrict mode frames from non-allowed address would be dropped. But in this mode, switch will make a log entry and generate a security violation alert.
