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NE20E-S2 V800R010C10SPC500 Configuration Guide - System Management 01

This is NE20E-S2 V800R010C10SPC500 Configuration Guide - System Management
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Configuring UTC Time Correction

Configuring UTC Time Correction

This section describes how to configure UTC time correction. This function helps ensure time signal accuracy on a 1588v2 network and a fix offset between the UTC and TAI time.


The UTC time is Greenwich Mean Time (GMT) that is displayed on a 1588v2 device, There is a fixed offset between the UTC time and TAI time. The International Earth Rotation Service (IERS) advertises the offset.

When a 1588v2 device tracks a BITS, the device uses the offset provided by the BITS by default. If the BITS clock signals are lost, the 1588v2 uses the previous offset, which may change. An offset change causes inaccurate time signals on the 1588v2 network.

To manually set the offset between the UTC time and TAI time, run the ptp utc-offset command only on the grandmaster.


  1. Run system-view

    The system view is displayed.

  2. Run ptp utc-offset utc-offset

    An accumulative offset between the UTC and TAI time is set.

  3. Run commit

    The configuration is committed.

Checking the Configuration

Run the following command to check the previous configuration.

Run the display ptp utc command to check the UTC time. For example:

<HUAWEI> display ptp utc
  • If the system time does not synchronize with the UTC time, the following information is displayed:
    Non-UTC Time:2000-01-04 09:56:24
  • If the system time is synchronized with the UTC time, the UTC time of the grandmaster clock that the system tracks is displayed. For example:
    UTC Time:2012-07-01 00:41:45
Updated: 2019-01-02

Document ID: EDOC1100055400

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