Huawei Quidway S6500 Series Operation Manual page 219

Operation Manual - Routing Protocol
Quidway S6500 Series Ethernet Switches
Table 5-25 Setting SPF calculation in slice
Set the duration of one cycle in second
of SPF calculation
Restore the default configuration
By default, SPF calculation does not divide into slices but runs to the end once, which
can also be implemented by setting the parameter seconds to 0.
After slice calculation is set, the routes that are not processed once will be calculated in
one second.
Normally, the user is not recommended to modify the default configuration. When the
number of routes is between 150,000 and 200,000, it is recommended to set the
parameter seconds to 1, that is, the duration time for SPF calculation each time is 1
second.
5.2.24 Setting SPF to Release CPU Actively
To prevent SPF calculation from occupying the system resources for a long time, which
has impact on the response speed of the console, SPF can be set to automatically
release the system CPU resources after processing a certain number of routes and the
unprocessed routes will be calculated in one second.
Perform the following configurations in IS-IS view.
Table 5-26 Setting SPF to release CPU actively
Specify the number of routes to process
before releasing CPU
Restore the default configuration
By default, CPU is released once when every 5000 routes are processed by the SPF of
IS-IS.
5.2.25 Setting SPF Computing Interval
When IS-IS LSDB changes, the router will compute the shortest path again. However,
the immediate calculation upon every change will occupy too many resources and
affect the efficiency of the router. In the case that SPF computing interval is set, when
LSDB changes, SPF algorithm will be run after the SPF interval times out.
Operation
Operation
Huawei Technologies Proprietary
5-18
Chapter 5 Integrated IS-IS Configuration
Command
spf-slice-size seconds
undo spf-slice-size
Command
spf-delay-interval number
undo spf-delay-interval