R3303-HP HSR6800 Routers Layer 3 - IP Routing Configuration Guide

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Ste
p
Command Remarks
3. Specify the hello
interval.
ospf timer hello seconds
Optional.
The hello interval defaults to 10 seconds on P2P
and broadcast interfaces, and defaults to 30
seconds on P2MP and NBMA interfaces.
The default hello interval is restored when the
network type for an interface is changed.
4. Specify the poll
interval.
ospf timer poll seconds
Optional.
The poll interval defaults to 120 seconds.
5. Specify the dead
interval.
ospf timer dead seconds
Optional.
The default dead interval is 40 seconds on P2P
and broadcast interfaces and 120 seconds on
P2MP and NBMA interfaces.
The default dead interval is restored when the
network type for an interface is changed.
6. Specify the
retransmission
interval.
ospf timer retransmit interval
Optional.
The retransmission interval defaults to 5
seconds.
Specifying LSA transmission delay
Each LSA in the LSDB has an age that is incremented by 1 every second, but the age does not change
during transmission. Therefore, it is necessary to add a transmission delay into the age time, especially
for low-speed links.
To specify the LSA transmission delay on an interface:
Ste
p
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
Optional.
One second by default.
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 not frequent, 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) each time a calculation occurs until the maximum-interval is reached.
To configure SPF calculation interval: