80
Step Command
Remarks
6.
Specify the
retransmission
interval.
ospf timer retransmit
interval
The default setting is 5 seconds.
A retransmission interval setting that is too small
can cause unnecessary LSA retransmissions.
This interval is typically set bigger than the
round-trip time of a packet between two
neighbors.
Specifying LSA transmission delay
To avoid LSAs from aging out during transmission, set an LSA retransmission delay especially for low
speed links.
To specify the LSA transmission delay on an interface:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Specify the LSA transmission
delay.
ospf trans-delay
seconds
The default setting is 1 second.
Specifying SPF calculation interval
LSDB changes result in SPF calculations. When the topology changes frequently, a large amount of
network and router resources are occupied by SPF calculation. You can adjust the SPF calculation interval
to reduce the impact.
When network changes are infrequent, the
minimum-interval
is adopted. If network changes become
frequent, the SPF calculation interval is incremented by
incremental-interval
× 2
n-2
(n is the number of
calculation times) for each calculation until the
maximum-interval
is reached.
To configure the SPF calculation interval:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter OSPF view.
ospf
[
process-id
|
router-id
router-id
|
vpn-instance
vpn-instance-name
] * N/A
3.
Specify the SPF
calculation interval.
spf-schedule-interval
maximum-interval
[
minimum-interval
[
incremental-interval
] ]
By default:
•
The maximum interval is 5 seconds.
•
The minimum interval is 50
milliseconds.
•
The incremental interval is 200
milliseconds.
