In Junos Evolved PTX platforms Zarlink read can fail which causes phy-sync failure in PTP.
 



The output of the following command from FPC shell displays state FALSE:

user@router-fpc0:pfe> show timingd phydriver sync_state 

Current PHY DRIVER state: FALSE

As a result, time of the day (TOD) is not updated on the affected FPC:

user@router-re0> show ptp time detail 

Since 1/1/1970 : 1694673867 seconds 
Calendar Time : Thu Sep 14 08:44:27 2023
BMC Slot : CB0 
BMC TOD : 1694673860 

Slot level info:
Slot PTP-state DPLL lock PhySync TOD seconds
FPC0 NA TRUE FALSE 1694665758    <<<<<<<
FPC1 NA TRUE TRUE 1694673860
CB0 PHASE ALIGNED TRUE NA 1694673860

root@router-fpc0:pfe> show timingd ptp nbr-upd-info 

Failed to get TOD time! Error: 11     <<<<<<<

The issue fixed. The fixed releases can be checked by contacting JTAC.

As a workaround (temporary), from FPC shell type below commands:

test clockd zarlink read 0x38a 1
test clockd zarlink write 0x38a 0x8
test clockd zarlink read 0x38a 1