timers spf — router
delay-time hold-timeno timers spf
Delay time, 5 seconds; hold time, 10 seconds
This command sets the two types of timers that are important to the OSPF protocol.
delay-time is the interval in seconds between the arrival of a topology change and the time OSPF starts the shortest path first (SPF) calculation.
hold-time is the minimum interval between two consecutive SPF calculations. Both timers must be in the range 0 to 65,535. Reducing these values may cause the router to switch to a different path more quickly, but this may be a detriment to performance; the SPF calculation is CPU-intensive.