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Precision Time Protocol (PTP)

  • Synchronous Ethernet with G.8262 Standard Support (MIC-3D-10GE-SFP-E)—Starting in Junos OS Release 24.2R1, MIC-3D-10GE-SFP-E for MPC2E-3D and MPC3E-3D line cards of MX240, MX480, MX960, MX2010, and MX2020 routers support synchronous Ethernet features compliant with the following International Telecommunication Union Telecommunication Standardization (ITU-T) standard. This facilitates the transference of clock signals over the Ethernet physical layer:

    Synchronous Ethernet (G.8262)—Timing and synchronization aspects in packet networks. Specifies timing characteristics of synchronous Ethernet equipment clock (EEC).

    [See Synchronous Ethernet]

  • Support for Precision Time Protocol with G.8275.1 Standard Support (MIC-3D-10GE-SFP-E)—Starting in Junos OS Release 24.2R1, MIC-3D-10GE-SFP-E for MPC2E-3D and MPC3E-3D line cards of MX240, MX480, MX960, and MX2020 routers support Precision Time Protocol (PTP) features compliant with the following International Telecommunication Union Telecommunication Standardization (ITU-T) standards. This facilitates the distribution of precise time and frequency over packet-switched Ethernet networks:

    • G.8275.1—PTP profile for phase and time (full timing support)

    • G.8275.1—PTP profile for phase and time over link aggregation group (LAG)

    [See Precision Time Protocol]

  • Support for Precision Time Protocol with Media Access Control Security encryption (MIC-3D-10GE-SFP-E)—Starting in Junos OS Release 24.2R1, MIC-3D-10GE-SFP-E for MPC2E-3D and MPC3E-3D line cards of MX240, MX480, MX960, and MX2020 routers support Precision Time Protocol (PTP) with Media Access Control Security (MACsec) encryption enabled on the same port at the same time.

    Note:

    The following limitations are applicable:

    1. The maximum limit for MACsec-enabled logical interfaces (IFL) is 200 per system.

    2. The maximum limit for MACsec-enabled ports with physical interfaces (IFDs) and IFLs where MACsec and PTP are enabled together on different ports is 200 per system.

    3. The maximum number of IFLs that can be supported on both 1G and 10G ports is 128.

    4. PTP in clear text mode is not supported.

    [See Guidelines to Configure PTP over Ethernet.]

  • Support for PTP Default profile over IPv4 unicast (MIC-3D-10GE-SFP-E on MX240, MX480, MX960, and MX2020)—Starting in Junos OS Release 24.2R1, the MX240, MX480, MX960, and MX2020 routers support the PTP default profile (IEEE1588). IEEE1588 defines best master clock algorithm options, configuration management options, and path delay mechanisms (peer delay or delay request-response). The following key features are supported:

    • Support for distribution of phase and time in 1G and 10G speeds.
    • Support for default profile in IPv4 unicast mode.

    [See PTP Profiles.]