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    • https://kb.netapp.com/on-prem/ontap/OHW/OHW-KBs/How_to_perform_a_cluster_port_loopback_test_for_2-node_switchless_clusters
      This procedure is used to determine which motherboard is at fault for a 2-node switchless cluster that uses the on-board e0a/e0b ports when one or both of the cluster ports are flapping. Note that for...This procedure is used to determine which motherboard is at fault for a 2-node switchless cluster that uses the on-board e0a/e0b ports when one or both of the cluster ports are flapping. Note that for nodes that do not use e0a/e0b for their cluster ports, the following procedure will need to be modified accordingly to refer to the correct in-use cluster ports on the respective nodes and available test ports as shown in the provided table.