128
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
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
backbone area. Without this keyword, the ABR advertises a default route in a Type-3 LSA into the stub
area only when at least one
FULL
-state neighbor exists in the backbone area.
no-summary
: Used only on a stub ABR. With this keyword, the ABR advertises only a default route in a
Type-3 LSA into the stub area without advertising any other Type-3 LSAs (such a stub area is a totally stub
area).