For establishing a resilient and functional cluster peer relationship for data protection, NetApp best practices require creating at least one Intercluster LIF on each node in both the source and destination clusters. This configuration ensures that if a volume is moved to a different node within its cluster (e.g., during a high-availability takeover event), replication can continue without interruption. Therefore, the six-node primary cluster requires a minimum of six Intercluster LIFs (one per node), and the two-node secondary cluster requires a minimum of two Intercluster LIFs (one per node).

A. This configuration is insufficient for a multi-node cluster, creating a single point of failure and preventing replication from any node that does not host the single LIF.

C. This is insufficient for the six-node primary cluster. Volumes on the four nodes without an Intercluster LIF would be unable to participate in replication.

D. This configuration exceeds the minimum requirement. While creating multiple Intercluster LIFs per node is a valid strategy for increasing throughput, it is not the minimum number needed.

1. NetApp ONTAP 9 Documentation, Network management, "Create intercluster LIFs" section: "For cluster peering, you must create at least one intercluster LIF on each node in the cluster. This practice enables each node to connect with every node in the peer cluster."

2. NetApp Technical Report 4182, "SnapMirror Configuration and Best Practices Guide for ONTAP 9," Section 3.1 Intercluster Networking: "NetApp recommends creating one intercluster LIF on each node in the cluster. This configuration provides the optimal balance of availability and simplicity."

3. NetApp ONTAP 9 Documentation, Data protection, "Prerequisites for cluster peering" section: "You must create at least one intercluster LIF on each node that will communicate with the remote cluster. It is a best practice to create intercluster LIFs on all nodes in the local and remote clusters."