Which three configurations are needed for an operational routed VLAN interface (RVI)?

The process of configuring an operational routed VLAN interface (RVI) involves a few critical steps that enable Layer 3 connectivity for the VLAN. One essential requirement is the configuration of unit settings on the VLAN interface. This includes specifying the IPv4 address and subnet mask, which are crucial for routing decisions—allowing devices on the network to communicate with each other across different VLANs.

In addition to unit settings, creating a VLAN in ethernet-switching is also necessary, as it establishes the VLAN structure within the switching environment. However, simply associating the VLAN to a physical interface is not sufficient, as it doesn’t address how the VLAN will route traffic, nor does it configure necessary Layer 3 parameters. Likewise, while it's vital to set the interface as a routed interface, ensuring that the configuration includes specific unit settings is a fundamental aspect that legitimizes the routing functionality of that interface.

Overall, the required configurations not only establish the VLAN for switching but also equip it with the necessary routing capabilities through the appropriate settings on the VLAN interface.