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Hierarchy Level

Release Information

Statement introduced in Junos OS Release 12.2.


Configure the clock step that determines whether the timing information is sent along with the synchronous message (one-step) only or a subsequent follow-up message (two-step) is received for the sent synchronous message.


one-step—One clock step to send timing information along with the synchronous message.

two-step—Two clock steps to send timing information and receive a subsequent follow-up message.


On MX Series routers, the two-step option is supported only for MPC1E and MPC2E line cards. This option is not supported for MPC5E, MPC6E, MPC7E, MPC8E, and MPC9E line cards.

Required Privilege Level

routing—To view this statement in the configuration.

routing-control—To add this statement to the configuration.