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Meta Networking at the 2026 OCP Global Summit: Open Innovation for Scale-Up, Scale-Out, and Scale-Across AI Networks

·2026.10.27 01:00

Key point

The announcement covers new hardware for the Prometheus cluster, including a petabit-scale BAG super-spine and the Tahan Ethernet scale-up switch for MTIA 300.

Details

  • Meta introduced IcePack and IceCube, its first liquid-cooled network rack featuring 102.4T switch blades with 128x800G capacity based on Broadcom Tomahawk 6C and NVIDIA Spectrum-6 ASICs.
  • The company launched Flattened Planar Fabric (FPF) for scale-out, a multi-plane architecture that reduces the Clos topology from 3-tier to 2-tier and uses NIC-level packet spraying, built with NVIDIA.
  • Meta shared MetaRoCE, its RDMA transport for AI networks, as open source, starting with a user-space version on GitHub and a DPDK-based version coming soon.
  • New initiatives include OSPA, a unified switch platform reference design co-led by Meta, Microsoft, and Alibaba, and Tahan, an Ethernet scale-up switch for the MTIA 300 system.
  • Scale-across networking is supported by BAG, a petabit-scale super-spine connecting buildings and regions in the gigawatt-scale Prometheus cluster, and SRv6 regional backbones running on FBOSS + SAI.
  • ESUN (Ethernet for Scale-up Networking) progressed from version 1.0 to 1.1, with a preview of 72 accelerators per rack on 102.4T silicon.
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