Port security may be a layer two activity control highlight on Cisco Catalyst switches. It empowers an administrator arrange person switch ports to permit as it were a indicated number of source MAC addresses ingressing the port.
Its essential utilize is to discourage the expansion by clients of “imbecilic” switches to illicitly amplify the reach of the arrange (e.g. so that two or three clients can share a single get to port).
The expansion of unmanaged gadgets complicates investigating by chairmen and is best maintained a strategic distance from.
Enabling Port Security
Switch(config)# interface f0/13
Switch(config-if)# switchport port-security