Configure PHY Timestamping

date_range 10-Jan-25

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You can configure timestamping either at the physical layer or at the nonphysical layer on the 10-Gigabit Ethernet and 100-Gigabit Ethernet ports. The PHY timestamping updates the correction field of the packet. PHY timestamping is supported in ordinary clock and boundary clock modes.

The following points need to be considered while configuring PHY timestamping:

PHY timestamping is enabled or disabled on all the PHYs. You cannot selectively enable or disable PHY timestamping on a particular interface.

Note:

The PHYs on ACX do not support PHY timestamping functionality for PTP-over-MPLS. You should not enable PHY timestamping if PTP is transported over MPLS.

To enable PHY timestamping, configure clock-mode (ordinary clock or boundary clock) along with the phy-timestamping CLI statement at the [edit protocols ptp] hierarchy.

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[edit protocols ptp]
user@host# set clock-mode (boundary | ordinary)

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[edit protocols ptp]
user@host# set phy-timestamping

Note:

Starting in Junos OS Release 17.1 onwards, to configure transparent clock, include the e2e-transparent CLI command at the [edit protocols ptp] hierarchy level. Prior to Junos OS Release 17.1, to configure transparent clock, include the transparent-clock CLI command at the [edit protocols ptp] hierarchy level.

On Junos Evo platforms, PHY timestamping is enabled by default and the phy-timestamping configuration option is unavailable.

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Timing and Synchronization Guide

Configure PHY Timestamping

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