This read-write value, in hundredths of a second, sets the rearm threshold used to compare successive alarm values, determining when a previously alarmed condition on this tunnel is considered cleared. Admins tune it to prevent an alarm from immediately re-triggering on borderline latency readings right after clearing. For example, setting a higher vpnPerformanceIfRearmThreshold than the alert threshold creates a buffer so latency has to clearly improve before the alarm is considered resolved.