This is a text timestamp recording exactly when the general life-to-date running counter for this metric, which an operator can zero with a manual clear -- which is why a clear-time field is defined alongside it began collecting its bytes and frames of broadcast, Layer-2 multicast, or unknown-unicast traffic that exceeded this port's flood/storm-control threshold and were dropped. On this element it is the anchor you need before trusting any of the accompanying flood-containment drop counters reported alongside it in this same bin, since without it you cannot tell whether a given count covers everything accumulated since the last manual clear or some other span entirely. For example, a start time of 2026-08-06 09:15 on this Stats bin tells you every flood-containment drop counter reported with it only reflects activity from that moment forward, not anything that happened earlier.