A customer is designing an AI Factory for enterprise-scale deployments and wants to ensure redundancy...

For the " North-South " and " Management/Storage " Ethernet fabrics in an NVIDIA AI Factory, high availability is paramount. Unlike the InfiniBand compute fabric, which uses its own routing logic, the Ethernet side relies on standard data center protocols. To provide true hardware redundancy and double the available bandwidth (Load Balancing), NVIDIA recommends MLAG (Multi-Chassis Link Aggregation). MLAG allows two physical switches to appear as a single logical unit to the DGX nodes. The DGX can then bond its two Ethernet NICs (e.g., in an 802.3ad LACP bond) and connect one cable to each switch. This configuration provides several benefits: if one switch fails, the traffic seamlessly stays on the other link without the slow convergence times associated with Spanning Tree Protocol (Option A). Furthermore, it allows the cluster to utilize the combined bandwidth of both links for heavy storage traffic (like NFS or S3 ingestion). Using a single switch (Option C) or unmanaged hardware (Option D) creates single points of failure and lacks the traffic isolation (VLANs) required for secure AI infrastructure.