If aluPtpParentSyncCertaintyState is supported by the PTP profile it is set based on the following rules: 1) a clock acting as a Grandmaster Clock (eg. T-GM) the aluPtpParentSyncCertaintyState will be set based on the value of aluPtpClockSyncCertaintyState. 2) a Boundary clock or an Ordinary Slave clock acting as a slave will set aluPtpClockParentSyncCertainty based on aluPtpPeerSyncCertainty that is associated with the aluPtpPortDSPortState that is in the 'slave (9)' state. The aluPtpParentSyncCertaintyState values 'certain(1)' and 'uncertain(2)' are only supported when the aluPtpClockProfile is 'g8275dot1-2014 (3)'. For all other profiles only 'unknown(0)' is supported.