This object sets a minimum hold-down time, in seconds, that the accounting buffer must remain filled above the chasAccountThreshold2 level before the chassis is allowed to switch TCP connections to the alternate collection device again. An admin uses this to prevent rapid flapping between the primary and secondary collection devices when the buffer level oscillates right around the threshold2 boundary, which would otherwise generate excessive reconnection churn. With this object set to 120 seconds, the accounting buffer must stay above the threshold2 level continuously for a full 2 minutes before the chassis will switch collection devices again.