As for now , the LAN NTP service will work as below:
Client devices → LAN NTP → System Time (Router)
System time have 2 sources:
-
RTC - Battery powered time storage to keeps time running even router is power off.
-
System (Router) synced with External NTP server
- Depend on System Time Server settings : LAN/WAN/SpeedFusion
For you requirements above, please send me your project info and we can discuss what we can help for that.