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3Com Switch 7750 Series
Command Reference Guide – Routing Protocol Chapter 4 Integrated IS-IS Configuration Commands
4-34
View
IS-IS view
Parameter
seconds: Duration time in milliseconds during SPF calculation, ranging from 150 to
50,000. A calculation is ended when the duration time is reached or exceeded. If the
second argument is set to 0, then the SPF calculation will continue until it finishes. It is
0 by default.
Description
Use the spf-slice-size command to configure whether the SPF routing calculation is
fragmented and the duration time for each fragment.
Use the undo spf-slice-size command to resume the default configuration.
When there are too many routes in the routing table, you can use this command to
fragment the SPF calculation to avoid taking up the system resources for too long.
You are not recommended to change the default configuration.
If the spf-delay-interval command is configured at the same time, the SPF
calculation will be paused if the SPF calculation matches any of the setting.
Related command: spf-delay-interval.
Example
# Set SPF duration time to one second.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] isis
[3Com-isis] spf-slice-size 1
4.1.40 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
Parameter
ip-address: Address range to generate summarized routes.
mask: Mask of an aggregate route.
level-1: Specifies to summarize only the routes imported to level-1 area.