switchport port security mac address sticky mac address

If you limit the number of secure MAC addresses to one and assign a single secure MAC address, the device attached to that port has the full bandwidth of the port.Ī security violation occurs in either of these situations: When you assign secure MAC addresses to a secure port, the port does not forward ingress traffic that has source addresses outside the group of defined addresses. You can use port security with dynamically learned and static MAC addresses to restrict a port’s ingress traffic by limiting the MAC addresses that are allowed to send traffic into the port. Port Security with Dynamically Learned and Static MAC Addresses Better not configure port-security on a trunk interface.Govt.

On a trunk port take care on violation options.

It cannot be configured on a EtherChannel port.

It cannot be configured on a mirrored port (SPAN).

It cannot be configured on a IEEE 802.1X port.There are some limitation for port security Issue “show port-security” command to view and verify settings for a switch or interface. Switch(config-if)# switchport port-security mac-address 0123.4567.89AB vlan 21 LAB1(config-if)# switchport port-security mac-address sticky LAB1(config-if)# switchport port-security maximum 5 LAB1(config-if)# switchport port-security LAB1(config)# interface gigabitethernet 0/1 Use options “absolute” to retain till specified time limit and option “inactive” to retain MAC address till specified time after inactivity. In case you want to remove dynamic learned addresses also, then disable Port security completely and re-enable it. However if you want more strict restriction, go for manual static entries.

After switch completes learning MAC addresses you can disable sticky and let the MAC address in dynamic allocation. For those who dont want to go each and every workstation and collect MAC addresses, there is an option called “sticky”. 2nd and 3rd options will notify administrators via SNMP Traps.

When there is a violation then switch will respond depends upon configuration. The number of addresses the feature accepts is equivalent to the maximum limit of MAC address of the switch.

The wireless equivalent of this feature is MAC address Authentication. This feature checks for MAC address of the device that has just accessed the switch port and verifies whether that device is allowed to connect wired network or not. Especially Software development companies and BPOs are the constant customer types asking for this feature to restrict devices connecting to their network.Ĭisco Port security is to limit the devices that are connecting to the Wired network via switches. Cisco Port security is an important feature to most of my customer.

Switchport port security mac address sticky mac address