H3C Technologies H3C S3600 Series Switches - Manual (Page 349)

4-22
Configuring the SPF Calculation Interval
Whenever the LSDB of OSPF is changed, the shortest paths need to be recalculated. When the
network changes frequently, calculating the shortest paths immediately after LSDB changes will
consume enormous resources and affect the operation efficiency of the router. By adjusting the
minimum SPF calculation interval, you can lighten the negative affect caused by frequent network
changes.
Follow these steps to configure the SPF calculation interval:
To do... Use the command... Remarks
Enter system view system-view —
Enter OSPF view
ospf [ process-id [ router-id
router-id ] ]
—
Configure the SPF
calculation interval
spf-schedule-interval interval
Required
5 seconds by default
Disabling OSPF Packet Transmission on an Interface
To prevent OSPF routing information from being acquired by the routers on a certain network, use the
silent-interface command to disable OSPF packet transmission on the corresponding interface.
Follow these steps to disable OSPF packet transmission on an interface:
To do... Use the command... Remarks
Enter system view system-view —
Enter OSPF view
ospf [ process-id [ router-id
router-id ] ]
—
Disable OSPF packet
transmission on a specified
interface silent-interface
silent-interface-type
silent-interface-number
Required
By default, all the interfaces are
allowed to transmit OSPF
packets.
z On the same interface, you can disable multiple OSPF processes from transmitting OSPF packets.
The silent-interface command, however, only applies to the OSPF interface on which the
specified process has been enabled, without affecting the interface for any other process.
z After an OSPF interface is set to be in silent status, the interface can still advertise its direct route.
However, the Hello packets from the interface will be blocked, and no adjacencies can be
established on the interface. This enhances OSPF networking adaptability, thus reducing the
consumption of system resources.
Configuring OSPF Authentication
Follow these steps to configure OSPF authentication: