You have just completed the global configuration settings of the access layer switches, including the RADIUS and AAA methods.
This section focuses on building a single port configuration that can be used across your entire secure unified access deployment, regardless of switch type, deployment stage, or deployment model you choose.
One of the first things to do before configuring any of the authentication settings on the switchport is to ensure the switchport is configured as a Layer-2 port, not a Layer-3 port. This command is a simple, one-word command that you will run, and from that point the other commands you enter will all take effect:
Step 1. ...