3com 8807 User Guide
356
C
HAPTER
32: I
NTEGRATED
IS-IS C
ONFIGURATION
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.
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.
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.
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.
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.
By default, CPU is released once when every 2500 routes are processed by the SPF
of IS-IS.
of IS-IS.
Enabling/Disabling IS-IS
Packet Transmission
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.
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.
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
sent on the interface, but the interface routes can still be sent from other
Table 339 Set SPF calculation in slice
Operation
Command
Set the duration of one cycle in second of SPF calculation
spf-slice-size seconds
Restore the default configuration
undo spf-slice-size
Table 340 Set SPF to release CPU actively
Operation
Command
Specify the number of routes to process before releasing CPU
spf-delay-interval number
Restore the default configuration
undo spf-delay-interval
Table 341 Enable/Disable IS-IS packet transmission
Operation
Command
Disable the interface from sending IS-IS
packets
packets
silent-interface interface-type
interface-number
interface-number
Enable the interface to send IS-IS packets
undo silent-interface interface-type
interface-number
interface-number