Configuring the Interval for Updating LSA

To promote the route aggregation rate on the network, you can configure the interval for updating LSAs as required.

Context

Complied with the OSPF protocol, the LSA update interval is five seconds. This prevents the flapping of network connection or routes from occupying too much bandwidth and resource.

In a stable network or a network that requires fast routing aggregation, you can set the LSA update interval to 0. Thus, once the topology or routes change, the change can be advertised to the network through LSA immediately. The speed of route aggregation on the network is increased.

Procedure

Access the system view.
system-view
Access the OSPF process view.
ospf [ process-id ]
Set an interval for updating the LSA.
lsa-originate-interval { 0 | intelligent-timer max-interval start-interval hold-interval [ other-type interval ] | other-type interval [ intelligent-timer max-interval start-interval hold-interval ] }

By default, the intelligent timer is enabled. The interval for updating LSAs is expressed in milliseconds. The maximum interval is 5000 milliseconds (ms), the initial interval is 500 ms, and the Holdtime interval is 1000 ms. After an intelligent timer is enabled, the interval for updating LSAs is as follows:
1. The initial interval for updating LSAs is specified by the parameter start-interval.
2. The interval for updating LSAs for the nth (n≥2) time is equal to hold-interval * 2(n-1).
3. When the interval specified by hold-interval * 2(n-1) reaches the maximum interval specified by max-interval, OSPF updates LSAs at the maximum interval for three consecutive times. Then, go back to Step 3.a, and OSPF updates LSAs at the initial interval specified by start-interval.