Missing Followup Messages

Enhanced PTP User Guide (UG1602)

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1.1 English
Figure 1. Flowchart for Missing Followup Messages

When the upstream master uses 2-step synchronization it should send periodic Sync messages. For every Sync there should be FollowUp message having the same sequence ID value.

Missing the occasional FollowUp message should not affect synchronization accuracy, but missing many of these messages or missing consecutive sequence IDs might harm the synchronization of the clocks.