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request chassis clock master switch



(PTX Series Packet Transport Routers only) Control which Centralized Clock Generator (CCG) is the primary.


This command has no options.

Additional Information

By default, the CCG in slot 0 (CCG0) is the primary and the CCG in slot 1 (CCG1) is the backup. If you use this command to change the primary, and then restart the chassis software for any reason, the primary reverts to the default setting. To change the default primary CCG, include the ccg statement at the [edit chassis redundancy] hierarchy level in the configuration. For more information, see the Junos OS Administration Library.

The configurations on the two CCGs do not have to be the same, and they are not automatically synchronized. If you configure both CCGs as primaries, when the chassis software restarts for any reason, the CCG in slot 0 becomes the primary and the one in slot 1 becomes the backup.

The switchover from the primary CCG to the backup CCG is immediate.

Required Privilege Level


Output Fields

When you enter this command, you are provided feedback on the status of your request.

Sample Output

request chassis clock primary switch

Release Information

Command introduced in Junos OS Release 12.1.