Turn a GPU count into leaf, spine, optics and BOM arithmetic you can do out loud in front of a customer and defend line by line.

1. 2.1 Rail-optimized design and what breaks itThe pod that passed every testAn
2. 2.2 Dual plane: two fabrics, not a bondThe bond with no partnerAn
3. 2.3 The sizing chain: GPUs, NICs, planes, leaves, spinesThe quote that fit in half a chassisAp
4. 2.4 The other three networks: converged, storage, out-of-bandThe call at 02:10Ap
5. 2.5 Optics, cables and the power nobody budgetedWhere are the optics?E
6. Checkpoint