Configuring the Automatic Clock Source Selection Mode and Reference Factors

Context

The NetEngine 8000 F supports three clock source selection modes: automatic clock source selection, manual clock source selection, and forcible clock source selection. By default, the NetEngine 8000 F works in automatic clock source selection mode.

In automatic clock source selection mode, three reference factors may affect the final clock source selection. The three reference factors are priorities, synchronous status message (SSM) levels, and clock IDs of clock sources.

By default, the automatic clock source selection algorithm selects a clock source based on priorities of clock sources.
If you have configured SSM levels to participate in clock source selection, the automatic clock source selection algorithm selects a clock source based on priorities and SSM levels of clock sources.
If the extended SSM function is enabled, clock IDs of clock sources also participate in clock source selection. The participation of clock IDs prevents clock loops.

Procedure

Run system-view
The system view is displayed.
(Optional) Run clock clear
The clock source selection mode is restored to automatic clock source selection.

If the command clock { manual | force } source {bits0 | ptp | interface interface-type interface-number } has been run, a clock source is manually or forcibly specified for system clocks.

Then you can run this command to restore the clock source selection mode from manual or forcible clock source selection to automatic clock source selection.
Run clock ssm-control { on | off }
SSM levels are configured to participate in automatic clock source selection.
(Optional) Run clock extend-ssm-control { on | off }
The extended SSM function is enabled so that clock IDs participate in automatic clock source selection.
(Optional) Run clock enhanced-ssm-control { on | off }
The enhanced SSM is enabled or disabled.
Run commit
The configuration is committed.