3Com Switch 7757, Configuration Manual

Page: 344 / 940

344 C
HAPTER
35: IS-IS C
ONFIGURATION
Configuring SPF to release CPU resources automatically
In IS-IS, SPF calculation may occupy system resources for a long time and slow
down console response. To avoid this, you can configure SPF to automatically
release CPU resources each time a specified number of routes are processed and
continue to calculate the remaining routes after one second.
Enabling/Disabling
Packet Transmission
Through an Interface
To prevent IS-IS routing information from being accessed by a router on another
network, use the
silent-interface command to configure the VLAN interface
containing the network segment to receive, but not to send, IS-IS packets.
Resetting all IS-IS
Configuration Data
Perform the following configuration in user view to refresh LSPs immediately.
Enter IS-IS view isis [ tag ] Required
Configure SPF
calculation duration spf-slice-size seconds Optional
By default, SPF calculation is not
sliced.
Table 283 Configure SPF to release CPU resources automatically
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Configure the interval at
which SPF releases CPU
resources spf-delay-interval number Optional
By default, in IS-IS, SPF releases
CPU resources each time it has
finished processing 5,000
routes.
Table 282 Configure SPF calculation durations
Operation Command Description
Table 284 Enable/disable packet transmission through an interface
Operation Command Description
Enter system view system-view -
Enter IS-IS view isis [ tag ] Required
Disable an interface from
sending IS-IS packets silent-interface
interface-type
interface-number
Optional
By default, an interface is
enabled to receive and send IS-IS
packets.
Table 285 Reset all IS-IS configuration data
Operation Command Description
Enter system view system-view -
Reset all IS-IS configuration
data reset isis all Optional
By default, IS-IS configuration
data is not cleared.