3Com 8807 Configuration Manual page 356

356 C 32: I
HAPTER NTEGRATED
Enabling/Disabling IS-IS
Packet Transmission
IS-IS C
ONFIGURATION
Table 339 Set SPF calculation in slice
Operation
Set the duration of one cycle in second of SPF calculation
Restore the default configuration
By default, SPF calculation is not divided into slices but runs to the end once,
which can also be implemented by setting the seconds argument 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 seconds argument to 1, that is, the duration time for SPF calculation each time
is 1 second.
Setting SPF to release CPU actively
To prevent SPF calculation from occupying the system resources for a long time,
which affects 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 configuration in IS-IS view.
Table 340 Set SPF to release CPU actively
Operation
Specify the number of routes to process before releasing CPU
Restore the default configuration
By default, CPU is released once when every 2500 routes are processed by the SPF
of IS-IS.
To prevent the IS-IS routing information from being obtained by some router in a
certain network, the silent-interface command can be used to prohibit sending
IS-IS packets via the interface connecting with the router.
Perform the following configuration in IS-IS view.
Table 341 Enable/Disable IS-IS packet transmission
Operation
Disable the interface from sending IS-IS
packets
Enable the interface to send IS-IS packets
By default, the interface is allowed to receive and send IS-IS packets.
The silent-interface command is only used to restrain the IS-IS packets not to be
sent on the interface, but the interface routes can still be sent from other
Command
spf-slice-size seconds
undo spf-slice-size
Command
spf-delay-interval number
undo spf-delay-interval
Command
silent-interface interface-type
interface-number
undo silent-interface interface-type
interface-number