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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


On a network, a device needs to be used by multiple carriers. If the carriers need to synchronize clocks with clients, you can configure the device as a TCandBC. On a TCandBC, a BC interface receives clock signals from the master clock and sends the clock signals to a downstream device, a TC interface only transmits clock signals. A TC interface on a TCandBC is responsible for forwarding PTP messages of PTP domains.


  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 tcandbc

    The device type is configured as TCandBC.

    By default, no device type is configured for a PTP device.

  5. Run:

    ptp domain domain-value

    The domain to which the BC interface of the TCandBC 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.

  7. (Optional) Run:

    ptp acl enable

    Access control of the clock source is enabled.

    By default, access control of the clock source is disabled.

  8. (Optional) Run:

    ptp acl-permit-clockid clockid-value

    A specified master clock source is added to the clock source whitelist.

    By default, no clock source whitelist is configured.

Updated: 2019-12-28

Document ID: EDOC1000142080

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