2-tier-gpu-fabric-calculator

2-Tier / 2-Plane Compute Fabric

GPU Compute Fabric BOM Calculator

2-Tier / 2-Plane Backend Fabric · B300 Clusters · Nokia 7220 IXR-H5-64O · 8 GPUs/Server · 32 Servers/SU

Cluster Size
Number of GPUs 1024 GPUs
256 (1 SU) 1024 2048 4096 8192 (32 SU)
Custom (any ×256)
✅
Architecture Summary
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To alperen.akpinar@nokia.com
Subject [Nokia GPU Fabrics]
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Bill of Materials
Component Role / Side Qty
Per-Plane Breakdown (Single Plane View)
Nokia 7220 IXR-H5-64O · 64 OSFP ports (800G each) · 64 server-facing + 64 spine-facing per leaf · 1:1 ratio
Spine count is sized to the next valid power-of-2 tier to ensure uniform ECMP distribution across all leaf-spine paths.
2-Tier (Leaf-Spine) · 2-Plane · Max 8192 GPUs for this switch architecture (32 SU, 1 link/leaf-spine pair)
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