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.
The system view is displayed.
An accumulative offset between the UTC and TAI time is set.
The configuration is committed.
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