H3C SOHO IE4300, Command Reference Manual

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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
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 overconsumption of bandwidth and router resources due to
frequent topology changes.
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.
The minimum interval and the incremental interval cannot be greater than the maximum interval.
Examples
# Set the maximum SPF calculation interval to 10 seconds, minimum interval to 500 milliseconds,
and incremental interval to 300 milliseconds.
<Sysname> system-view
[Sysname] ospf 100
[Sysname-ospf-100] spf-schedule-interval 10 500 300
stub (OSPF area view)
Use
stub
to configure an area as a stub area.
Use
undo stub
to restore the default.
Syntax
stub [ default-route-advertise-always | no-summary ] *
undo stub
Default
No area is a stub area.
Views
OSPF area view
Predefined user roles
network-admin