Explain and configure the three mechanisms that make Spectrum-X different from a stock RoCE fabric — per-packet adaptive routing, SuperNIC reordering, and telemetry-based congestion control — and know exactly when each is ineligible.

1. 4.1 Adaptive routing: per-packet spraying and its eligibility rulesThe register that says yes and means noAn
2. 4.2 Why spraying needs a SuperNIC: reordering and direct data placementThe line item the server team wants to changeU
3. 4.3 Telemetry-based congestion control: three loops, not oneHigh pause, low marks, at ten past twoAn
4. 4.4 Programmable congestion control with DOCA PCCCoffee, a laptop, and a customer who wants their own algorithmAp
5. 4.5 Multiplane fabrics and multi-tenant performance isolationQuad-plane on the hardware they already ownAn
6. Checkpoint