# MetaRoCE

At the 2026 OCP Global Summit, Meta published the network designs behind its latest AI models and its gigawatt-scale Prometheus cluster. Scale-out had been organized as a three-tier Clos, and the switch platform layer stayed proprietary, with each new platform repeating months of bring-up work. Meta now connects each GPU to eight network planes and flattens Clos to two tiers, and shows IcePack, its first liquid-cooled network rack, holding IceCube, a 102.4T switch with 128 800G ports; MetaRoCE goes open source and the OSPA 1.0 specification goes to OCP.

At the 2026 OCP Global Summit, Meta published the network designs behind its latest AI models and its gigawatt-scale Prometheus cluster. Scale-out had been organized as a three-tier Clos, and the switch platform layer stayed proprietary, with each new platform repeating months of bring-up work. Meta now connects each GPU to eight network planes and flattens Clos to two tiers, and shows IcePack, its first liquid-cooled network rack, holding IceCube, a 102.4T switch with 128 800G ports; MetaRoCE goes open source and the OSPA 1.0 specification goes to OCP.