Command Reference Guide

3Com Router 5000 Family and Router 6000 Family timer spf ● 283
Command Reference
timer spf
Purpose Use the timer spf command to configure the interval for the SPF calculation.
Use the undo timer spf command to restore the default setting.
Syntax timer spf seconds [ level-1 | level-2 ]
undo timer spf [ level-1 | level-2 ]
Parameters seconds
Specifies the SPF calculation interval (in seconds). Valid
values are 1 to 120.
If no value is specified, the default value is 5 seconds.
level-1
Sets Level-1 SPF calculation interval only.
level-2
Sets Level-2 SPF calculation interval only.
If the level is not specified, it defaults to SPF interval of
Level-1.
Example Set the SPF calculation interval of the router to 3 seconds.
[3Com -isis] timer spf 3
View This command can be used in the following views:
■ IS-IS view
Description In IS-IS protocol, when the LSDB of the corresponding level is changed, SPF
calculation is required. However, if the SPF calculation is performed too frequently, the
system efficiency will be lowered and a great number of resources on the network will
be occupied. SPF calculation interval can improve its calculation efficiency to some
degree. This setting can be made according to actual conditions.