Value of sysUpTime at the most recent event that caused a
discontinuity in the monotonic operation of any of the
counters in this entry. Such disruption might be caused by:
Hardware insertion/removal.
Reconfiguration of usdFrDlcmiState.
Reconfiguration of usdFrDlcmiRole.
Conclusions can be drawn from successive polls of an entry's
counters only if the value of this object, simultaneously
retrieved in those polls, remains unchanged.