Verify switch port security

In this lab, two source routers reach the same destination through an access switch.

Verify both paths and identify the hardware address of the source on the port we will protect.

Enable port security and allow one deliberately different address on the protected port.

The protected source can no longer reach the destination, while the other source still can.

Restrict mode reports the violation and keeps the port up.

Replace the configured address with the actual source address and check both paths again.