PTP phase alignment and hybrid mode enhancements

The Precision Timing Protocol (PTP) feature includes the following enhancements:

• After PTP is phase-aligned, if the system up time is less than 30 minutes and the PTP source is lost before 30 minutes, the PTP state will be moved to free run. On the other hand, if the system up time is more than 30 minutes and the PTP source is lost, the PTP state will move to holdover. 
• If PTP is never phase-aligned and PTP source is lost, the PTP state shall move to free run. 
• While operating in PTP Hybrid mode, the state of PTP will be in holdover for 8 days after a PTP clock source is lost but a valid high stratum SyncE source is present. 
• PTP state will transition to holdover irrespective of the current state of acquiring or phase aligned as long as PTP was phase-aligned once and system uptime was more than 30 minutes.