In this article, we have discussed what the Cisco interface security is. You can watch the video below to enable security settings for Switch’s ports and also subscribe to our YouTube channel to support us! Configuring interfaces can be deceptively easy. This makes senseinterfaces are the main points of connectivity, sending and receiving traffic throughout an organization.
Administrators are tasked with configuring interfaces on network devices more than any other single thing. The above commands are Explains that Port Security enabled on FastEthernet0/1 and that only one MAC address can access via this interface, and the Sticky command will take into account the MAC address of the connected computer.Īs a result, when an unauthorized person or another computer on the network connects to this port, the violation will occur, and the port will be closed, and notify you. define the maximum number of MAC addresses that can be used on the port by using the switchport port-security maximum NUMBER interface submode command. Network Basics: Configuring Interfaces on Ethernet Switches. Switch(config-if)# switchport port-security violation shutdown Now, interface g0/1 is allowed to learn only one MAC address. TestSwitch(config)int g0/1 TestSwitch(config-if)switchport mode access TestSwitch(config-if)switchport port-security TestSwitch(config-if)switchport port-security maximum 1. Switch(config-if)# switchport port-security mac-address sticky Below is an example of Port Security where only one MAC address is allowed on interface g0/1.
Switch(config-if)# switchport port-security maximum 1 Switch(config-if)# switchport port-security Switch(config)# interface FastEthernet 0/1 After using this command, you must also set the action on the port in case of violation. You can use the switchport port-security command to enable Port Security on the Switch. An unauthorized user who is physically trying to access from the outside must not be able to connect his or her computer to a Switch on the network. Its primary use is to deter the addition by users of 'dumb. It enables an administrator configure individual switch ports to allow only a specified number of source MAC addresses ingressing the port. You should evaluate each step and take steps accordingly. Port security is a layer two traffic control feature on Cisco Catalyst switches. The main roles of preventing unauthorized access to a network environment are to close the idle ports on the Switch and enable the Port Security feature on the active ports.įor example, it is difficult to maintain security at a high level on a large network. Because the OSI model controls traffic flow in layer 2, you can make MAC address-based restrictions.īy restricting each port on the Cisco Switch and activating it for only one computer, we can disable the port when another computer is connected to that port, thus ensuring that the network environment remains secure.