Specifying SPF calculation interval
LSDB changes result in SPF calculations. When the topology changes frequently, a large amount of network and router resources are occupied by SPF calculation. You can adjust the SPF calculation interval to reduce the impact.
For a stable network, the minimum interval is used. If network changes become frequent, the SPF calculation interval is incremented by the incremental interval × 2^{n}^{2} for each calculation until the maximum interval is reached. The value n is the number of calculation times.
To configure the SPF calculation interval:
Step  Command  Remarks 

1. Enter system view.  systemview  N/A 
2. Enter OSPF view.  ospf [ processid  routerid routerid  vpninstance vpninstancename ] *  N/A 
3. Specify the SPF calculation interval.  spfscheduleinterval maximuminterval [ minimuminterval [ incrementalinterval ] ]  By default:
