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Precision Time Protocol (PTP)

  • Support for SyncE MIB and PTP MIB (ACX7024, ACX7024X, ACX7100-32C, ACX7100-48L, ACX7332, and ACX7348)—Starting in Junos OS Evolved Release 24.2R1, the listed ACX Series devices support:

    • Defect and event management capabilities for timing features.

    • SNMP get, get-next, and walk management capabilities for timing features. These capabilities are enabled through the Synchronous Ethernet MIB (SyncE MIB) and Precision Time Protocol MIB (PTP MIB) timing objects.

    [See Timing Defects and Event Management on Routing Platforms and SNMP MIB for Timing on Routing Platforms.]

  • Support for frequency and phase offset relaxation (ACX7024, ACX7100-32C, and ACX7100-48L)—Starting in Junos OS Evolved Release 24.2R1, you can relax the frequency and phase offsets required for a PTP lock on the listed ACX Series devices. To configure, use the frequency-lock-threshold and phase-adjust-threshold options of the ptp statement. You can also relax the maximum phase offset to adjust in a phase-aligned state by configuring the phase-adjust-threshold statement in the PTP configuration.

    [See ptp.]

  • Support for clearing PTP stream statistics (ACX7024, ACX7100-32C, ACX7100-48L, ACX7332, and ACX7348)—Starting in Junos OS Evolved Release 24.2R1, you can clear the stream statistics for primary, client and stateful interfaces on the listed ACX Series devices. To clear the stream statistics, use the newly introduced clear ptp statistics stream command.

    [See clear ptp statistics stream.]

  • Automatic client support using subnet mask (ACX7100-32C and ACX7100-48L)—Starting in Junos OS Evolved Release 24.2R1, the listed ACX Series devices support clients over subnet masks automatically over both IPv4 and IPv6.

    [See Clock Clients.]

  • Support for PTP G.8275.2 over LAG (ACX7100-32C, ACX7100-48L, ACX7024)—Starting in Junos OS Release 24.2R1, the ACX7100-32C, ACX7100-48L, and ACX7024 routers support PTP G.8275.2 enhanced profile features compliant with the International Telecommunication Union Telecommunication Standardization (ITU-T) G.8273.4 standards. The following key features are supported:

    • Support for ordinary clocks and boundary clocks.
    • Support for the alternate best master clock algorithm.
    • Support for full domain and packet-rate ranges.
    • Support for primary and secondary asymmetry values.
    • Support for manual mode (no unicast negotiation) and mixed mode.
    • Support for primary(active) and secondary link configuration.

    [See PTP Profiles.]