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S12700 V200R010C00 Configuration Guide - Device Management

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.

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Configuring PTP Globally

Configuring PTP Globally


In actual networking, a device may need to transmit multi-channel clock signals but does not need to synchronize with multiple clock sources. You can configure the device as a transparent clock (TC), which then transmits clock signals and measures the link delay without having to synchronize with the clock signals.


  1. Run:


    The system view is displayed.

  2. Run:

    ptp enable

    PTP is enabled.

    By default, PTP is disabled.

  3. (Optional) Run:

    ptp freq-sync

    Frequency synchronization is enabled.

    By default, time synchronization is enabled and frequency synchronization is disabled after PTP is enabled.

  4. Run:

    ptp device-type { e2etc | e2etcoc | p2ptc | p2ptcoc }

    The PTP device type is configured as TC.

    By default, no device type is configured for a PTP device.
    End to end transparent clock and ordinary clock (E2ETCOC) is a transparent ordinary clock that supports only the end-to-end delay mechanism. Peer to peer transparent clock and ordinary clock (P2PTCOC) is a transparent ordinary clock that supports only the peer-to-peer delay mechanism. TCOC is a special TC. It is an ordinary TC in terms of time synchronization but can recover the frequency based on PTP messages to synchronize with the upstream device.

  5. (Optional) Run:

    ptp domain domain-value

    The PTP domain to which the device belongs is configured.

    By default, a PTP device belongs to domain 0.
    Devices that perform clock synchronization through PTP messages must belong to the same PTP domain.

  6. (Optional) Run:

    ptp virtual-clock-id clock-id-value

    A virtual clock ID is set for the device.

    By default, no virtual clock ID is configured for a PTP device, and the system generates a clock ID based on the MAC address of the device. You can also configure a virtual clock ID to identify the device.

    When running the ptp virtual-clock-id command, ensure that the configured virtual clock ID is unique in the entire PTP domain.

Updated: 2019-12-28

Document ID: EDOC1000142080

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