To train the latest AI models, cloud-service providers are investing in large accelerated-compute clusters. AI  training, however, presents different requirements for network architects than standard compute instances.  Proprietary interconnects have dominated these clusters as the most-performant solutions. Here, we examine  an alternative fabric architecture built around ubiquitous Ethernet technology. Broadcom sponsored the creation  of this white paper, but the opinions and analysis are those of the author. Download the full  white paper  for free, no registration required.