3com 8807 Reference Guide

C

HAPTER

 26: I

NTEGRATED

 IS-IS C

ONFIGURATION

 C

OMMANDS

IS-IS view

seconds: Duration of one cycle in seconds of SPF calculation 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.

Use the spf-slice-size command to enable IS-IS to calculate SPF routes in slices 
and configure the duration of each calculation.

Use the undo spf-slice-size command to restore the default setting.

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.

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.

# Set the SPF duration time to one second.

[3Com-isis] spf-slice-size 1 

summary ip-address mask [ level-1 | level-1-2 | level-2 ]

undo summary ip-address mask [ level-1 | level-1-2 | level-2 ]

IS-IS view

ip-address: Summarized network segment address.

mask: Summarized network mask.

level-1: Summarizes the routes imported into Level-1.

level-1-2: Summarizes the routes imported into Level-1 and backbone area.