Active IQ Config Advisor is the official NetApp tool used during the planning and sales phase to design and validate system configurations. It checks a proposed MetroCluster configuration against a comprehensive set of rules based on NetApp's best practices and the Interoperability Matrix Tool (IMT). This ensures the configuration is valid, complete, and supportable before any hardware is ordered or deployed, preventing costly errors.

A. NetApp System Manager is a graphical interface used for the day-to-day management and monitoring of an already deployed ONTAP cluster.

C. The ONTAP CLI Debug Tool is an advanced command-line interface used for deep troubleshooting on an operational system, not for pre-deployment planning.

D. StorageGRID Manager is the management console for NetApp's StorageGRID object storage solution, which is a separate product from ONTAP MetroCluster.

1. NetApp. (n.d.). Active IQ Config Advisor. NetApp Product Documentation. Retrieved from NetApp website. The tool's description states its purpose is to "validate configurations against a robust set of rules, ensuring that systems are configured correctly before they are sold."

2. NetApp. (2023). TR-4705: MetroCluster Solution Architecture and Design. Section: "Planning a MetroCluster configuration." This document outlines the planning process where tools like Config Advisor are used to ensure a valid design.