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#Cisco mac address learning port security how to#

You can specify the MAC address that is allowed to access the network resources manually by using the command switchport port-security mac-address value of MAC address.

The command to configure this is as follows switch port-security violation. The default is to shut down the interface or interfaces.

This step is optional, but you can define the action to take when a violation occurs on that interface or interfaces.

The command to configure this is as follows, swithcport port-security maximum X (where X can be from 1 to 6272) Keep in mind the range the number of maximum MAC address depends on the hardware and Cisco IOS you use. If this setting is not applied the default of one MAC address is used.

This step is optional, but you can specify how many MAC addresses the switch can have on one interface at a time.

This can be applied in a range of the interfaces on a switch or individual interfaces.

You must enable port security by using the switchport port-security command.

Must make the switch interface an access interface by using the switchport mode access command.(This is the default behavior is no setting is specified.īefore setting up port security some steps need to be completed before we can set it up correctly: Shutdown which discards the traffic sends a SNMP message and disables the port.Restrict which discards the traffic and sends a SNMP message but keeps the port up.Protect which discards the traffic but keeps the port up and does not send a SNMP message.Let's get started! There are three different settings you can configure with port security: If and when an unauthorized device is connected to a port you can decide what you want the switch to do. Port security can restrict devices so only devices you allow are granted access to network resources. Port security is one of the first things you can do to keep your network secure from unauthorized access.

#Cisco mac address learning port security how to#

Today this tutorial is going to be talking about how to configure port security on a Cisco Catalyst switch.