Lightweight time synchronization implements automatic identification and switching within a device, loosening the requirements on time synchronization precision and simplifying the configuration process.
The system preferentially uses hop-by-hop 1588v2 time synchronization in In-situ Flow Information Telemetry (iFIT) delay measurement scenarios. Hop-by-hop 1588v2 time synchronization requires that all devices on the network support 1588v2 in order to achieve delay measurement in the sub-microsecond range. If some devices on the network do not support 1588v2, you can enable lightweight and sub-millisecond-level time synchronization on downstream devices to achieve delay measurement in the sub-millisecond range.
This command does not need to be configured in non-iFIT scenarios. Otherwise, the time synchronization precision is affected.