Which command address learning on the configures port security on a switch to enable permanent MAC interface?

There is no standard `switchport port-security mac-address-learning enable` command for this functionality; learning behavior is controlled by `sticky` or `dynamic` modes.

`switchport port-security mac-address timer 0` configures the aging time for dynamically learned secure MAC addresses to never age, but it doesn't enable the sticky learning mechanism itself.

The `switchport port-security mac-address sticky` command enables sticky MAC address learning. This feature allows the switch to dynamically learn MAC addresses from traffic on the port and then convert these learned addresses into static, secure MAC addresses in the running configuration, effectively making them 'permanent' for port security enforcement until explicitly removed or the configuration is cleared.

`switchport port-security mac-address maximum 1 sticky` enables sticky learning and sets a maximum, but the core command for enabling the sticky learning functionality is `switchport port-security mac-address sticky`.

There is no `switchport port-security mac-address permanent` command; static MAC addresses are manually configured, and sticky MACs provide the 'permanent learned' behavior.