Configuring The Lsa Transmission Delay; Configuring The Spf Calculation Interval - H3C S5600 SERIES Operation Manual

To do...
Configure the interval for
retransmitting an LSA on an
interface
Default Hello and Dead timer values will be restored once the network type is changed.
Do not set an LSA retransmission interval that is too short. Otherwise, unnecessary retransmission
will occur. LSA retransmission interval must be greater than the round trip time of a packet between
two routers.

Configuring the LSA transmission delay

Follow these steps to configure the LSA transmission delay:
To do...
Enter system view
Enter interface view
Configure the LSA
transmission delay
The transmission of OSPF packets on a link also takes time. Therefore, a transmission delay should be
added to the aging time of LSAs before the LSAs are transmitted. For a low-speed link, pay close
attention on this configuration.

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...
Enter system view
Enter OSPF view
Use the command...
ospf timer retransmit interval
Use the command...
system-view
interface interface-type
interface-number
ospf trans-delay seconds
Use the command...
system-view
ospf [ process-id [ router-id
router-id ] ]
4-21
Remarks
Optional
5 seconds by default
Remarks
—
—
Required
1 second by default
Remarks
—
—