Sets the maximum delay, in milliseconds (default 5000), the router waits after a Link State Database change before recalculating its routing table, a throttle that reduces how often expensive SPF recalculations run during bursts of topology change. An admin lowers this for faster convergence at the cost of more frequent recalculation, or raises it on a large, frequently-changing network to reduce CPU load from recalculation storms; a value of 0 means recalculation happens immediately on every database update.