VR2R-0664_r1

VR2R-0664

① SA Source

• Source: 開啟完整 SA 文章
• Section: Ethernet-Based Cluster Deployments
• Line hint: 573

Context Before

The catch is that 102.4T Minipack-4 switches may not be shipped in time for Vera Rubin NVL72 rack deployments, and if this were to be the case, some NSF clusters will be shipped using 51.2T Minipack-3 switches instead.

Evidence

This means that gearboxes within the AECs will have to be used to convert 200G per lane SerDes speed at the NIC to 100G per lane SerDes speed at the switch.

Context After

Meta will not be the only hyperscaler using 1.6T AECs for its VR200 deployments. We think xAI will use 1.6T AECs for both NIC-to-TOR and switch-to-switch connectivity at the leaf, spine and core layers. It will be a single-plane network replacing most 1.6T transceivers at the switch boxes—and this can give Credo plenty of pricing power.

② Atomic Claim

這表示 AEC 內的 gearboxes 必須把 NIC 端每 lane 200G 的 SerDes speed，轉換成 switch 端每 lane 100G 的 SerDes speed。

• Epistemic Mode: INFERRED
• Mapping Status: COMPLETE

③ Semantic Frame

{
  "frame_type": "NARY_RELATION",
  "participants": [
    {
      "node": {
        "id": "04_knowledge_base/Active electrical cable",
        "label": "AEC"
      },
      "role": "cable"
    },
    {
      "node": {
        "id": "04_knowledge_base/NIC",
        "label": "NIC"
      },
      "role": "network_interface"
    },
    {
      "node": {
        "id": "04_knowledge_base/SerDes",
        "label": "SerDes"
      },
      "role": "signaling"
    }
  ],
  "qualifiers": {
    "condition_text": "gearbox and switch endpoint are plain text",
    "numeric_mentions": [
      "200G",
      "100G"
    ],
    "temporal_mentions": []
  },
  "relation_type": "AEC_GEARBOX_CONVERTS_NIC_SERDES_200G_TO_SWITCH_100G"
}

④ Canonical Entity Mapping

Role	Surface Label	Canonical Target
cable	AEC	04_knowledge_base/Active electrical cable
network_interface	NIC	NIC
signaling	SerDes	SerDes

⑤ Human Review

請在 Properties 逐項確認：

• 原文 → Atomic Claim 是否忠實
• Atomic Claim → Semantic Frame 是否忠實
• Canonical Entity mapping 是否正確
• Epistemic mode 是否保留原文語氣
• 最後選擇 review_action

Review state

Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。