PTP accuracy held across an NVIDIA Spectrum switch (one-step boundary clock, sustained across link speeds and FEC configurations)
~10 nsobserved
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | End-to-end PTP accuracy across the switch. The sub-4 ns figure is the internal Spectrum ASIC synchronization error and ConnectX-class NIC timestamp variance, carried as its own register entry (internal-asic-sync-error-spectrum-and-connectx) — do not read it off this tile. |
| As of | 2022-09 |
| Source | NVIDIA Technical Blog, 'Calculating and Synchronizing Time with the Precision Timing Protocol on the NVIDIA Spectrum Switch' (developer.nvidia.com, 2022) · PTP accuracy section; overall accuracy around 10 ns, maintained across all speeds and FEC configurations; ASIC synchronization error below 4 ns |
| Review | checking…review by 2026-11-23 · standard cadence |
| Recorded changes | last 2026-09-16 · 3 revisions tracked |
| Claim id | ptp-accuracy-held-across-a-spectrum-switch |
Where the guide uses it
- 8.7 Management, Out-of-Band Fabric & PTP/IEEE-1588 Timing
- 13.7 Network Fabric Commissioning & Validation
← Full numbers register — every date-stamped figure in the guide, with revision history.