// RDMA
InfiniBand AI GPU Clusters Ethernet RDMA RoCE Network Design Data Center NVIDIA Ultra Ethernet

InfiniBand for AI Clusters: Why Ethernet Isn't Enough (Yet)

Every major AI training cluster runs InfiniBand. The $5 trillion question is whether Ultra Ethernet will change that. The honest answer: not yet, and here's exactly where the gap is.

Rene Fichtmueller / 2026-05-30 / ~3 min read min read
AI GPU Cluster Optical Networking 400G 800G RoCEv2 RDMA Data Center InfiniBand Network Fabric H100 B200 LPO Machine Learning HPC

AI Fabrics Need Different Optics — GPU Clusters Are Not Normal Data Centers

Your data center runs web applications. Your procurement team buys optics for web application traffic. Then someone installs a GPU cluster, and the optics team discovers that AI fabric traffic

Rene Fichtmueller / 2026-04-28 / ~4 min read min read