The Management Unit synchronizes the SVP clock to its own time.
If no other synchronization instance is present in BS2000, on SU /390 the system time is synchronized with the SVP clock, and thus implicitly with the time of the Management Unit. This is achieved by performing a periodic time comparison in BS2000 between the SVP time and the BS2000 system time, and the BS2000 system time is then adapted as necessary.
> | The corresponding information can be found in the SYSTEM-TIME-PARAMETER section of the SHOW-SYSTEM-INFORMATION command’s output: |
The MU can be connected to an external timer. The MU shows the BS2000 that an external timer exists if the NTP time has a stratum <= 4.
> | The corresponding information can be found in the SYSTEM-TIME-PARAMETER section of the SHOW-SYSTEM-INFORMATION command’s output: |
In addition, in BS2000 you can configure an NTP network with an external timer which then constitutes the highest synchronization instance (see section "synchronization in an NTP network".