--- title: "MetaRoCE: A New RDMA Transport Built for AI-Scale Ethernet" url: https://daily.dev/posts/metaroce-a-new-rdma-transport-built-for-ai-scale-ethernet-4rzmhaxu4 source_url: https://engineering.fb.com/2026/08/24/networking-traffic/metaroce-rdma-transport-ai-ethernet type: article source: "Facebook Engineering\n" published: 2026-08-24T18:05:38.872Z updated: 2026-08-24T18:06:12.994Z tags: ["networking", "ai-infrastructure"] reading_time: 8 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # MetaRoCE: A New RDMA Transport Built for AI-Scale Ethernet **[Facebook Engineering ](https://daily.dev/sources/facebook_code)** · 8 min read · 0 upvotes · 0 comments ## Summary Meta introduces MetaRoCE, a clean-sheet RDMA transport protocol designed for AI workloads on commodity Ethernet at million-GPU scale. Unlike standard RoCE, which relies on in-order delivery and PFC-based losslessness, MetaRoCE moves intelligence to the NIC, embracing native out-of-order delivery, multipathing with per-path telemetry, loss tolerance without pause frames, and dual-sided congestion control. Tested on a 64-node AMD GPU cluster with Pensando NICs, it showed higher throughput and lower flow completion times than RoCEv2, maintaining ~86% throughput at 1% packet loss and degrading gracefully even at 10% loss. Meta is contributing the specification, a compliance suite, and a software reference implementation (libsoftmetaroce) to the Open Compute Project, with a full release planned at the 2026 OCP Global Summit in October. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is MetaRoCE and how does it differ from standard RoCEv2? MetaRoCE is a clean-sheet RDMA transport protocol built by Meta for AI workloads on commodity Ethernet. Unlike standard RoCEv2, which requires in-order packet delivery and PFC-based losslessness, MetaRoCE tolerates loss and out-of-order arrival by design, sprays packets across many per-connection paths with individual telemetry, and moves congestion and ordering intelligence to the NIC instead of the switch fabric. _Track emerging RDMA transport designs like MetaRoCE as AI network architectures evolve, via daily.dev._ ### How does MetaRoCE perform under packet loss compared to RoCEv2? MetaRoCE maintains roughly 86% throughput at 1% packet loss and continues delivering useful bandwidth even at 10% loss, converging gracefully instead of collapsing. Tests ran on a 64-node AMD GPU cluster using RCCL collectives with AMD Pensando programmable NICs, comparing all-reduce and all-to-all operations against RoCEv2, which degrades sharply under similar loss conditions. _Compare network transport resilience benchmarks like these on daily.dev when evaluating AI infrastructure choices._ ### When will Meta release the MetaRoCE specification and reference implementation publicly? Meta plans to release the MetaRoCE specification, a DPDK-optimized software reference implementation, and a production compliance framework in October at the 2026 OCP Global Summit. The specification is being contributed to the Open Compute Project for multi-vendor adoption, alongside the libsoftmetaroce software reference stack that runs on commodity Linux over standard UDP sockets. _Follow open networking standard releases such as this one on daily.dev to plan infrastructure adoption timelines._ ## Similar posts on daily.dev - [What is RDMA over Converged Ethernet \(RoCE\)?](https://daily.dev/posts/what-is-rdma-over-converged-ethernet-roce--rjpagkmdv) · Ubuntu · 0 upvotes · 0 comments - [NVIDIA Spectrum-X — the Open, AI-Native Ethernet Fabric — Sets the Standard for Gigascale AI, Now With MRC](https://daily.dev/posts/nvidia-spectrum-x-the-open-ai-native-ethernet-fabric-sets-the-standard-for-gigascale-ai-now-wi-8nauo5ewr) · NVIDIA · 0 upvotes · 0 comments --- Tags: [#networking](https://daily.dev/tags/networking), [#ai-infrastructure](https://daily.dev/tags/ai-infrastructure) [View this post on daily.dev](https://daily.dev/posts/metaroce-a-new-rdma-transport-built-for-ai-scale-ethernet-4rzmhaxu4)