The following figure illustrates an example of a 3-node cluster that is configured with a single-link full mesh storage network interconnect. External network traffic uses the LOM/rNDC/OCP integrated network adapter, while storage network traffic uses a QLogic FastLinQ 25 GbE PCIe adapter per server node. The management network offers some redundancy in the event of a storage network connectivity (cable or port) failure.
Note: Single-link full mesh topologies rely on the management network for storage and live migration redundancy purposes. The management network is also shared with VM traffic. During failure scenarios, and high throughput network load, contention between these three traffic types has the potential to degrade the cluster. For this reason, Dell Technologies recommends a dual-link full mesh network interconnect for high-performance storage configurations and workloads.