Ethernet · RoCE · InfiniBand
AI Fabric Spine-Leaf 計算ツール
GPU サーバーの接続要件を Leaf、Spine、Pod、媒体の検証可能な計画に変換し、物理ケージと論理 breakout ポートを分けて扱います。
算定結果
算定方法
pooled または rail で端点を配置し、物理ケージ単位の downlink/uplink 分割を列挙した上で、oversubscription、Spine radix、2-tier Pod 上限、Spine 1 台障害を検証します。
oversubscription = (D × endpoint rate) ÷ (U × uplink rate)
計画上の境界
発注可能な BOM ではありません。breakout、光学部品、距離、ファームウェア、電力、冷却、SKU はベンダー確認が必要です。
プラットフォーム根拠
仕様と提供状況はリンク先の公式資料に基づき、容量は片方向 line rate に統一しています。
プラットフォーム根拠 (2026-07-26)
| Vendor / model | Protocol | Line rate | Status |
|---|---|---|---|
| Broadcom Tomahawk 5 BCM78900 | ethernet | 51.2 Tb/s | Silicon reference — select a shipping system for procurement |
| Broadcom Tomahawk 6 family | ethernet | 102.4 Tb/s | Silicon reference — system profiles vary |
| Juniper QFX5240-64OD | ethernet | 51.2 Tb/s | Current documented platform |
| Juniper QFX5250-64OE-L | ethernet | 102.4 Tb/s | Shipping; confirm exact orderability |
| Arista 7060X6-64PE | ethernet | 51.2 Tb/s | Current product |
| Arista 7060XE7-64PS | ethernet | 102.4 Tb/s | Planning reference — announced availability Q4 2026 |
| Arista 7800R4-AI | ethernet | 460.8 Tb/s | Catalog reference — modular chassis solver required |
| Cisco N9364E-SG2-O | ethernet | 51.2 Tb/s | Current documented platform |
| Cisco N9364E-SP2R | ethernet | 51.2 Tb/s | Current documented spine |
| Cisco N9164E-NS4-O | ethernet | 51.2 Tb/s | Planning reference — confirm SKU lifecycle and orderability |
| Ruijie RG-S6990-64OC2XS | ethernet | 51.2 Tb/s | Current product page |
| Ruijie RG-S6990-128QC2XS | ethernet | 51.2 Tb/s | Current product |
| NVIDIA SN5400 | ethernet | 25.6 Tb/s | Current documentation; confirm exact SKU/NOS lifecycle |
| NVIDIA SN5600 | ethernet | 51.2 Tb/s | Current documentation; confirm exact SKU/NOS lifecycle |
| NVIDIA SN5610 | ethernet | 51.2 Tb/s | Current documentation; confirm exact SKU/NOS lifecycle |
| NVIDIA SN3420 | ethernet | 4.8 Tb/s | Model disambiguation only |
| NVIDIA QM9700 | infiniband | 25.6 Tb/s | Mass Production |
| NVIDIA QM9790 | infiniband | 25.6 Tb/s | Mass Production |
| NVIDIA Q3400-RA | infiniband | 115.2 Tb/s | Planning reference — NVIDIA lifecycle P-Rel |
| NVIDIA Q3450-LD | infiniband | 115.2 Tb/s | Prototype planning reference |