PTP Slave with Failover between GPS, PTP and Local Oscillator

Time-Stamping and Time Synchronization
Platform
Napatech SmartNIC
Content Type
User Guide
Capture Software Version
Link™ Capture Software 12.2

Illustration

The figure shows a configuration where the primary reference is GPS via a time server and the secondary reference is a PTP grandmaster. If all external references fail, the time stamp clock fails over to the local oscillator (FreeRun).
Note: On NT200A02 and NT200A01 SmartNICs the RJ45 and SMA ports on the external time synchronization connector are replaced by separate RJ45 and SMA time synchronization connectors.
Page-1 Sheet.1 Sheet.2 Sheet.3 Sheet.4 Sheet.5 Sheet.6 Sheet.7 Sheet.8 Napatech Accelerator Napatech SmartNIC Sheet.9 PTP Slave PTP Slave Sheet.10 Sheet.11 TS TS Sheet.12 Clk Clk Sheet.13 Sheet.14 Sheet.15 Sheet.16 Sheet.17 Sheet.18 Sheet.19 PTP Grandmaster PTP Grandmaster Sheet.20 Sheet.21 Ref Ref Sheet.22 Clk Clk Sheet.23 Sheet.24 Sheet.25 Sheet.26 SMA SMA Sheet.27 Sheet.28 Sheet.29 Sheet.30 Sheet.31 Sheet.32 Sheet.33 Sheet.34 Sheet.35 Sheet.36 Time Server Time Server Sheet.37 Sheet.38 Sheet.39 Ref Ref Sheet.40 Clk Clk Sheet.41 PTP PTP Sheet.42 PPS PPS Sheet.43 Sheet.44 Sheet.45 Primary Reference Primary Reference Sheet.46 Secondary Reference Secondary Reference Sheet.47 Sheet.48 Sheet.49 Sheet.50 Sheet.51 Sheet.52 Sheet.53 Sheet.54 PTP PTP Sheet.55 Network Network Sheet.56 Sheet.57 Sheet.58 TS Con TS Con Sheet.59 Sheet.60 Sheet.61 Sheet.62 Sheet.63 Sheet.64 Sheet.65 Sheet.66 Sheet.67 RJ45 RJ45 Sheet.68 TCXO TCXO Sheet.69 Sheet.70

ntservice.ini configuration

These ntservice.ini code lines configure the NT SmartNIC (Napatech SmartNIC PTP Slave) for the setup in Illustration and to permanently run in PTP slave-only mode (clock class 255).

TimeSyncConnectorExt1 = PpsIn
TimeSyncReferencePriority = Ext1, PTP, FreeRun