I have a similar issue using 200G-LC board with 10.6.2 version.
When I configure a new circuit, from time to time I have a Sync Loss alarm. For clearing the issue, I have many options, but none is 100% reliable :
- delete and recreate the PPM port
-configure fec none and no fec in the router
- shut / no shut in the router
- replace the CPAK SR4
- replace the 200G-LC board
I have the issue only with SR4, never with SR10
Router are NCS5k, NCS55A1, NCS55A2 and Nexus 7706.
