Meta unveils open networking infrastructure at OCP 2026: IcePack, IceCube and OSPA

Next-generation networking hardware

At the 2026 Open Compute Project (OCP) Global Summit, Meta shared the open networking infrastructure it has built for AI clusters. IcePack, the company's first liquid-cooled network rack, is based on OCP's ORV3-HPRv1 rack standard. Inside each rack sit IceCube switch blades with 102.4 Tbps capacity, delivering 128×800G non-blocking switching.

IceCube comes in two variants: one built on Broadcom's Tomahawk6C switch ASIC and one on NVIDIA's Spectrum-6 switch ASIC. Both run Meta's open-source FBOSS network operating system and leverage the OCP SAI interface. According to Meta, this generation doubles the bandwidth of its 51.2T platforms.

Fabrics and protocols

Meta introduced Flattened Planar Fabric (FPF), a multiplane backend fabric that changes how GPUs connect to the network. The company also detailed its petabit-scale backend aggregation (BAG) super-spine for multi-site clusters and its SRv6 regional backbones.

Open-source implementations of MetaRoCE, Meta's RDMA transport protocol for AI networks, were also released. Meta said its MTIA 300 system uses Tahan, an Ethernet-based 51.2T scale-up switch, delivering 6.4 Tbps per accelerator.

The OSPA initiative

A new OCP initiative called Open Switch Platform Architecture (OSPA) was announced, co-led by Meta, Microsoft and Alibaba. The initiative aims to standardize the switch platform layer, and specification v1.0 has been submitted to OCP. Meta is inviting engineers, silicon vendors and system integrators to join the open ecosystem.