To enable the Layer 2 port of the Layer 3 switch on the Cisco emulator, you need to enter the interface configuration mode and execute the switchport' command.

Explanation:

1. Start the simulator and enter the command line interface. This usually requires a user name and password.

2. Enter the enable command to enter privileged mode.

3. Enter the command configure terminal or' conf t' to enter the global configuration mode.

4. Use the Interface command to select the interface to be configured. For example, if you want to configure the first port, you should enter "interface FastEthernet 0/ 1".

5. In the interface configuration mode, enter the switchport command. This will set the interface as a Layer 2 port.

This is how to enable Layer 2 ports of Layer 3 switches on a Cisco emulator. It should be noted that different simulators may be slightly different, but most Cisco simulators, such as Packet Tracer or GNS3, should support the above steps.

Extended content:

By default, all ports on Cisco Layer 3 switches are Layer 2 ports. If you want to configure the port as a three-layer port, you can use the no switchport command. In addition, if you want to view the current status of the INTERFACE, you can use the "show interfaces interface switch port" command, where "interface" should be replaced with the name of the interface you want to view. For example, if you want to check the status of the first port, you should enter "show interfaces fastethernet0/1switchport".