Setting Lsa Transmission Delay; Setting Spf Calculation Interval - HP FlexFabric 12900E Series Configuration Manual

Step
5. Set the dead interval.
6. Set the retransmission
interval.

Setting LSA transmission delay

To avoid LSAs from aging out during transmission, set an LSA retransmission delay especially for
low speed links.
To set the LSA transmission delay on an interface:
Step
1. Enter system view.
2. Enter interface view.
3. Set the LSA transmission
delay.

Setting 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.
For a stable network, the minimum interval is used. If network changes become frequent, the SPF
calculation interval is incremented by the incremental interval × 2
maximum interval is reached. The value n is the number of calculation times.
To set the SPF calculation interval:
Step
1. Enter system view.
2. Enter OSPF view.
Command
ospf timer dead seconds
ospf timer retransmit interval
Command
system-view
interface
interface-number
ospf trans-delay seconds
Command
system-view
ospf [ process-id |
router-id | vpn-instance
vpn-instance-name ] *
85
Remarks
By default:
•
The dead interval on P2P and
broadcast
seconds.
•
The dead interval on P2MP and
NBMA interfaces is 120 seconds.
The dead interval must be a minimum of
four times the hello interval on an
interface.
The default dead interval is restored
when the network type for an interface is
changed.
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.
Remarks
N/A
interface-type
N/A
The default setting is 1 second.
n-2
for each calculation until the
Remarks
N/A
router-id
N/A
interfaces is 40