Specifying An Lsa Transmission Delay; Specifying Spf Calculation Interval - HP 4800G Series Configuration Manual

The hello and dead intervals restore to default values after you change the network type for an
interface.
The dead interval should be at least four times the hello interval on an interface.
The poll interval is at least four times the hello interval.
The retransmission interval should not be so small for avoidance of unnecessary LSA
retransmissions. In general, this value is bigger than the round-trip time of a packet between two
adjacencies.

Specifying an LSA Transmission Delay

Since OSPF packets need time for traveling on links, extending LSA age time with a delay is necessary,
especially for low speed links.
Follow these steps to specify an LSA transmission delay on an interface:
To do...
Enter system view
Enter interface view
Specify an LSA transmission
delay

Specifying SPF Calculation Interval

The LSDB changes lead to SPF calculations. When an OSPF network changes frequently, a large
amount of network resources will be occupied, reducing the working efficiency of routers. You can
adjust the SPF calculation interval for the network to reduce negative influence.
Follow these steps to configure SPF calculation interval:
To do...
Enter system view
Enter OSPF view
Specify SPF calculation
interval(s)
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
| vpn-instance instance-name ] *
spf-schedule-interval
maximum-interval [ minimum-interval
[ incremental-interval ] ]
1-34
Remarks
—
—
Optional
1 second by default
Remarks
—
—
Optional
By default, the interval is 5
seconds.