spf-schedule-interval

Use spf-schedule-interval to set the OSPF SPF calculation interval.

Use undo spf-schedule-interval to restore the default.

Syntax

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

undo spf-schedule-interval

Default

The maximum calculation interval is 5 seconds, the minimum interval is 50 milliseconds, and the incremental interval is 200 milliseconds.

Views

OSPF view

Predefined user roles

network-admin

mdc-admin

Parameters

maximum-interval: Specifies the maximum OSPF SPF calculation interval in the range of 1 to 60 seconds.

minimum-interval: Specifies the minimum OSPF SPF calculation interval in the range of 10 to 60000 milliseconds.

incremental-interval: Specifies the incremental OSPF SPF calculation interval in the range of 10 to 60000 milliseconds.

Usage guidelines

Based on the LSDB, an OSPF router uses SPF to calculate a shortest path tree with itself as the root. OSPF uses the shortest path tree to determine the next hop to a destination. By adjusting the SPF calculation interval, you can prevent bandwidth and router resources from being over-consumed due to frequent topology changes.

When network changes are not frequent, OSPF performs SPF calculations at the minimum-interval. If network changes become frequent, the SPF calculation interval is incremented by the incremental-interval each time a calculation happens until the maximum-interval is reached.

The minimum interval and the incremental interval cannot be greater than the maximum interval.

Examples

# Configure the maximum SPF calculation interval as 10 seconds, minimum interval as 500 milliseconds and incremental interval as 300 milliseconds.

<Sysname> system-view
[Sysname] ospf 100
[Sysname-ospf-100] spf-schedule-interval 10 500 300