This object specifies the preemption delay, in seconds from 0 to 300, that the Smart Link group waits before switching traffic back to a preferred port after preemption conditions are met. Admins tune this delay to avoid flapping when a recovering link is still stabilizing before it's trusted to carry traffic again. Setting this to 30 seconds means the group waits half a minute after the primary port comes back up before failing traffic back to it.