What AOS-CX command is used to convert a layer three interface to a layer two interface?

The command used to convert a layer three interface to a layer two interface is "No Routing." In the context of network configurations, a layer three interface is typically associated with routing capabilities, meaning it can participate in routing protocols and handle IP traffic. When you apply the "No Routing" command, it effectively disables the routing functionality of that interface, thereby transforming it into a layer two interface, which operates at the data link layer and can be used for switching purposes within a local area network.

This command is crucial in scenarios where you need an interface to operate in a layer two mode, such as in switch configurations that do not require IP addressing or need to connect to other layer two devices.

The other options do not serve to convert an interface from layer three to layer two. "No IPV6" and "No IP Address" are commands related to IP configurations but do not change the operational layer of the interface. Similarly, "No shut down" is used to enable an interface that might be administratively shut down, but it does not affect whether the interface is functioning as layer two or layer three.