Switch 7700 Command reference Guide, v2.0

Integrated IS-IS Configuration Commands 185
Example
Set IS-IS to release CPU once after processing every 3000 pieces of routes.
[SW7700-isis]spf-delay-interval 3000
spf-slice-size Syntax
spf-slice-size seconds
undo spf-slice-size
View
IS-IS view
Parameter
seconds: Duration time in second for SPF calculation each time in the range from
0 to 120. When the calculation duration time reaches or exceeds the set value, the
calculation of this time ends. If seconds is set to 0, it indicates that SPF calculation
is not divided into slices and it will operate until the end. By default, the value is 0.
Description
■ Use the spf-slice-size command to configure whether to set slice and the
duration time each time when IS-IS performs SPF route calculation.
■ Use the undo spf-slice-size command to restore the default setting.
When there is a large number of routes in the routing table, this command can be
used to enable the SPF calculation in slices to prevent it from occupying the system
resources for a long time.
The user is recommended to use the command when the number of routes
reaches 150,000 or 200,000 and the value of seconds is recommended as 1. In
other cases, the default setting should be used, that is, SPF runs to the end with
no slice.
If the spf-delay-interval command is also configured, when SPF calculation is
run, the SPF calculation will be paused if any setting item is met.
Related command: spf-delay-interval.
Example
Set the SPF duration time to 1 second.
[SW7700-isis]spf-slice-size 1
summary Syntax
summary ip-address mask [ level-1 | level-1-2 | level-2 ]
undo summary ip-address mask [ level-1 | level-1-2 | level-2 ]
View
IS-IS view