4-21z Default Hello and Dead timer values will be restored once the network type is changed.z Do not set an LSA retransmission interval that is too short. Otherwise, unnecessary retransmissionwill occur. LSA retransmission interval must be greater than the round trip time of a packet betweentwo routers.Configuring the LSA transmission delayFollow these steps to configure the LSA transmission delay:To do... Use the command... RemarksEnter system view system-view —Enter interface view interface interface-typeinterface-number —Configure the LSAtransmission delay ospf trans-delay seconds Required1 second by defaultThe transmission of OSPF packets on a link also takes time. Therefore, a transmission delay should beadded to the aging time of LSAs before the LSAs are transmitted. For a low-speed link, pay closeattention on this configuration.Configuring the SPF Calculation IntervalWhenever the LSDB of OSPF is changed, the shortest paths need to be recalculated. When thenetwork changes frequently, calculating the shortest paths immediately after LSDB changes willconsume enormous resources and affect the operation efficiency of the router. By adjusting theminimum SPF calculation interval, you can lighten the negative affect caused by frequent networkchanges.Follow these steps to configure the SPF calculation interval:To do... Use the command... RemarksEnter system view system-view —Enter OSPF view ospf [ process-id [ router-idrouter-id ] ] —Configure the SPFcalculation interval spf-schedule-interval interval Required5 seconds by default
