Enabling Port Security

Port security can be enabled on access ports or trunk ports, but they must be statically configured as access or trunk.

• switchport mode access -> OK

• switchport mode trunk -> OK

• switchport mode dynamic auto

• switchport mode dynamic desirable

Re-enabling an interface (manually)

Re-enabling an interface (ErrDisable Recovery)

Every 5 minutes (by default), all err-disabled interfaces will be re-enabled if err-disable recovery has been enabled for the cause of the interface's disablement.

ErrDisable Recovery is useless if you don't remove the device that caused the interface to enter the err-disabled state!