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.

When network changes are not frequent, the minimum-interval is adopted. If network changes become frequent, the SPF calculation interval is incremented by incremental-interval × 2^n-² (n is the number of calculation times) each time a calculation occurs until the maximum-interval is reached.

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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