This read-write integer sets how long, from 10 to 1,000,000 seconds with a default of 300, a dynamically learned entry in the acquired database can remain inactive before the bridge drops it. An admin shortens this value on a busy, address-turnover-heavy network to free up table space faster, or lengthens it on a stable network to avoid unnecessary relearning churn. For example, lowering acqDynAgeTime from the 300-second default to 60 seconds would cause the bridge to forget inactive host mappings much faster, which helps on a segment with frequent device turnover like a guest network.