Command Reference Guide

3Com Router 5000 Family and Router 6000 Family spf-slice-size ● 291
Command Reference
spf-slice-size
Purpose 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.
Syntax spf-slice-size seconds
undo spf-slice-size
Parameters seconds
Duration time for SPF calculation each time (in
seconds). Valid values are 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.
If no value is specified, the default value is 0.
Example Set the SPF duration time to 1 second.
[3Com -isis] spf-slice-size 1
View This command can be used in the following views:
■ IS-IS view
Description When there are 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. Each time the router processes some route information, it
will free CPU to process other things, and process route information after 1 second.
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