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.	system-view	N/A
2. Enter OSPF view.	ospf [ process-id \| router-id router-id \| vpn-instance vpn-instance-name ] *	N/A
3. Specify the SPF calculation interval.	spf-schedule-interval maximum-interval [ minimum-interval [ incremental-interval ] ]	By default: The maximum interval is 5 seconds. The minimum interval is 50 milliseconds. The incremental interval is 200 milliseconds.

Step

Command

Remarks

1. Enter system view.

system-view

N/A

2. Enter OSPF view.

ospf [ process-id | router-id router-id | vpn-instance vpn-instance-name ] *

N/A

3. Specify the SPF calculation interval.

spf-schedule-interval maximum-interval [ minimum-interval [ incremental-interval ] ]

By default:

The maximum interval is 5 seconds.
The minimum interval is 50 milliseconds.
The incremental interval is 200 milliseconds.

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