Command Manual - Routing Protocol
Quidway S6500 Series Ethernet Switches Chapter 4 Integrated IS-IS Configuration Commands
Huawei Technologies Proprietary
4-36
Example
# Set the LSP refresh interval of the current system to 25 minutes, i.e., 1500 seconds.
[Quidway-isis] timer lsp-refresh 1500
4.1.44 timer spf
Syntax
timer spf seconds [ level-1 | level-2 ]
undo timer spf [ level-1 | level-2 ]
View
IS-IS view
Parameter
seconds: Specifies the SPF calculation interval, ranging from 1 to 120 and measured in
seconds. The default value is 10 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 setting both Level-1 and level-2 intervals.
Description
Using timer spf command, you can configure the interval for the SPF calculation of
corresponding level. Using undo timer spf command, you can restore the system
default value, that is, 5 seconds.
Usually, when the LSDB of the corresponding level is changed, SPF calculation is
required. However, when the network is unstable and LSDB changes frequently, if the
SPF calculation is performed too frequently, the system efficiency will be lowered. In a
severe condition, other services will be affected. By setting proper interval for
performing SPF calculation, you can avoid the above situation. Certainly, the interval
for SPF calculation cannot be set too long, because a long interval will prevent the
current routing table from showing the actual network condition. This sitting must be
made according to actual conditions.
Example
# Set the SPF calculation interval of the router to 3 seconds.
[Quidway-isis] timer spf 3
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