乙太網路是否已為 AI 做好準備？證據已在供貨

The hardware is here

Open 800G AI switches are not a preview. They are on the hardware compatibility list and shipping. OcNOS-DC runs on Broadcom Tomahawk 5 and Tomahawk 4 platforms from Edgecore and UfiSpace, the same merchant silicon the rest of the industry builds AI fabrics on, so you keep switch, NIC, and GPU choices open. These are on-chip, shared-buffer switches built for lossless RDMA at 800G.

The scale is proven

The most common objection to Ethernet for AI is scale, and the industry has already answered it in production. You do not have to take a switch vendor's word for it, because the hyperscalers publish their designs.

在 OcNOS-DC 上，同樣的物理規律也適用於您的構建。雙層 Tomahawk 5 設計在每 GPU 800G、1:1 收斂比下可達 4,096 個 GPU。超出後，super-spine 層可擴展至 16,000 個以上。請參閱 AI fabric 拓撲 for the port math behind each tier.

The utilization gap is closed

The old knock on Ethernet was load balancing: standard ECMP pins each large flow to one uplink, so during a collective some links jam while parallel paths sit idle and the sync waits on the slowest link. That gap is now closed on the same switches, and the proof is a hardware feature, not a promise.

The standard is moving

適用於 AI 的乙太網路並非單一廠商的專有岔路。 Ultra Ethernet Consortium 發布了 UEC 1.0 規範，使乙太網路傳輸適配 AI 與 HPC 的規模，並獲得晶片、NIC 與雲端運算企業的支援。IP Infusion 是 Ultra Ethernet Consortium 的 成員 。

UEC 1.0 定義了一種多路徑傳輸，將一條流分散到多條路徑上，而不是固定在單個 ECMP 雜湊上，這一端點行為執行於支援 UEC 的 NIC 上。OcNOS-DC 如今已在 Broadcom Tomahawk 4 和 Tomahawk 5 交換器上，於生產環境中執行基於 PFC、ECN 標記和 DLB 的無損 RoCEv2。DCQCN 執行於 NIC 上，並對這些 ECN 標記做出反應。請參閱 Ultra Ethernet 深度解析 for how packet spray and multi-path RDMA change the transport.

What OcNOS-DC ships today

Underneath the proof points is a fabric you can turn up now. OcNOS-DC provides the lossless Ethernet fabric that RoCEv2 requires, so your training collectives move GPU-to-GPU over RDMA without loss. DCQCN is the end-to-end loop between the NICs and the switches; the switch role in that loop is early ECN marking. Every primitive below is verified and shipping, not a roadmap item.

What is coming next

The items below are roadmap and upcoming-silicon, labeled as such. They are not shipping capabilities today, and none of the figures are IP Infusion performance numbers.