The Ethernet Evolution
Standardizing the Fabric.
Today's AI clusters are dominated by **InfiniBand**, a specialized, proprietary fabric optimized for HPC. To compete, a consortium including Microsoft, Meta, AMD, and Intel founded the **Ultra Ethernet Consortium (UEC)**.
Unlike standard Ethernet, which uses flow-based hashing (ECMP) and handles congestion poorly, UEC introduces **Packet-Level Spraying** and hardware-native reordering. This allows the network to treat every switch port as a single giant pipe, achieving near-perfect utilization for the world's largest GPU clusters.
Scalable Transport
Replaces the aging RoCE/TCP stack with a hardware-native transport that allows out-of-order delivery across multiple paths.
Multipath Flow
Automatically divides large 'Elephant Flows' into 'Mice-like Packets' and sends them simultaneously through every available switch path.