R0106-HP MSR Router Series Layer 3 - IP Routing Command Reference(V7)

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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.
When network changes are infrequent, OSPF performs SPF calculations at the minimum-interval. If
network changes become frequent, the SPF calculation interval is incremented by incremental-interval ×
2
n-2
(n is the number of calculation times) for each calculation 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
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
Parameters
default-route-advertise-always: Used only on a stub ABR. With this keyword, the ABR advertises a
default route in a Type-3 LSA into the stub area regardless of whether FULL-state neighbors exist in the