Sticky secure mac address voice vlan
From Configuring Port Security. You can configure an interface to convert the dynamic MAC addresses to sticky secure MAC addresses and to add them to the running configuration by enabling sticky learning. To enable sticky learning, enter the switchport port-security mac-address sticky command. When you enter this command, the interface converts all the dynamic secure MAC addresses, including those that were dynamically learned before sticky learning was enabled, to sticky secure MAC addresses.
The sticky secure MAC addresses do not automatically become part of the configuration file, which is the startup configuration used each time the switch restarts. If you save the sticky secure MAC addresses in the configuration file, when the switch restarts, the interface does not need to relearn these addresses. If you do not save the configuration, they are lost.
But host B The default gateway on host B should be Which option is the default switch port port-security violation mode? When in this mode, the switch will automatically force the switchport into an error disabled err-disable state when a violation occurs.
While in this state, the switchport forwards no traffic. The switchport can be brought out of this error disabled state by issuing the errdisable recovery cause CLI command or by disabling and re-enabling the switchport.
By default, how many MAC addresses are permitted to be learned on a switch port with port security enabled? If the maximum number of MAC addresses is reached, when another MAC address attempting to access the port a security violation occurs. Which set of commands is recommended to prevent the use of a hub in the access layer?
Catalyst 4500 Series Switch Cisco IOS Software Configuration Guide, 12.2(31)SG
Select the action that results from executing these commands: Switch config-if switchport port-security Switch config-if switchport port-security mac-address sticky A. A dynamically learned MAC address is saved in the startup-configuration file. A dynamically learned MAC address is saved in the running-configuration file.
Statically configured MAC addresses are saved in the startup-configuration file if frames from that address are received. Statically configured MAC addresses are saved in the running-configuration file if frames from that address are received. We will discuss theses security violation modes a little bit later. In a Cisco switch, you are able to configuration three types of security violation modes.
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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. Depending on the action you want a switch to take when a security violation occurs, you can configure the behavior of a switch port to one of the following:.
The default configuration of a Cisco switch has port security disabled. If you enable switch port security, the default behavior is to allow only 1 MAC address, shutdown the port in case of security violation and sticky address learning is disabled. Next, we will enable dynamic port security on a switch.
As you can see, we did not specify an action to be taken if a security violation occurs, neither how many MAC addresses are allowed on the port. Recalling from above, the default behavior is to shutdown the port and allow only one MAC address. If a violation occurs, you want the port to be configured in restrict mode. Knowing what switch port security is and how to implement it is important.