The IEEE-1588 specification proposes a PTP message-based mechanism for application-independent monitoring of the timing information from PTP nodes.
sfptpd supports the standard and the sfptpd PTP slave includes the optional three data sets TLVs
in PTP Signaling messages (message type 0xc) sent from the sfptpd slave server to a remote monitoring station:
- SLAVE_RX_SYNC_TIMING_DATA TLV
- The slave reports the timestamp for received Sync messages.
- SLAVE_RX_SYNC_COMPUTED_DATA TLV
- The slave reports the calculated offset and one-way-delay values.
- SLAVE_TX_EVENT_TIMESTAMPS TLV
- The slave reports the timestamp for sent Delay_Request messages.
For further details of the IEEE specification you should refer to the specification documentation.