NOKIAData Center Fabric
GPU Compute Fabric BOM Calculator
2-Tier Backend Fabric · Nokia 7220 IXR-H5-64O · 8 GPUs/Server · 32 Servers/SU
NIC & GPU Configuration
Per-GPU NIC / Fabric Plane Mode
NIC Vendor (within mode)
GPU Platform
Vera Rubin NVL72 · Compute Fabric Spec
Octal-plane (8-plane) backend over Nokia 7220 IXR-H6-64O. Each Rubin compute tray has 4 GPU packages and 8 ConnectX-9 SuperNICs (2 per GPU). 18 trays per NVL72 rack · 14 racks per Scalable Unit.
Per Compute Tray
4 GPUs
8x CX-9 SuperNIC · 4 OSFP cages
Per NVL72 Rack
72 GPUs
18 trays · 144 SuperNICs
Per Scalable Unit
1,008 GPUs
14 racks · 32 leaves + 16 spines
Per-GPU Bandwidth
1.6 Tb/s
2x 800G CX-9 SuperNIC · 8 lanes x 200G
Cluster Size
Custom (any ×256)
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Architecture Summary
Bill of Materials
| Component | Role / Side | Qty |
|---|
Per-Plane Breakdown (Single Plane View)
GPU × NIC Compatibility Matrix (Nokia 7220 IXR-H5-64O fabric · Tomahawk 5 ASIC)
| GPU Platform | BCM Thor2 (400G, PCIe Gen5) | NVIDIA CX7 (400G, PCIe Gen5) | NVIDIA CX8 (800G, PCIe Gen6) | BCM 800G (future / TBD) |
|---|
✓ Vendor-validated pairing△ Feasible · suboptimal (over- or under-provisioned)… Future / not generally shipping
All combinations are SerDes-compatible with the H5-64O (Tomahawk 5): 800G OSFP cages run 4×200G PAM4 (CX8) or break out to 2×400G as 4×100G PAM4 (CX7 / Thor2). Compatibility is about vendor validation, host PCIe generation, and bandwidth balance — not signaling.
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