Configure an S series switch to accelerate OSPF route convergence

The following network changes affect OSPF route convergence.
A device detects that the peer link is down and the neighbor relationship becomes invalid.
A new link-state advertisement (LSA) is generated and flooded.
The Link State Database (LSDB) is updated. A new route is calculated through the Shortest Path First (SPF) routing algorithm and delivered to the Forwarding Information Base (FIB) table.

To accelerate OSPF aggregation, you can perform the following operations on a switch:
Set a Hello interval and a Dead interval on the peer device or configure the BFD to rapidly detect failures.
Set spf-schedule-interval (of which the default value is 5, in seconds) to a smaller value to shorten the SPF calculation interval.
Set the LSA generation interval to a smaller value.
Set the LSA arrival check interval to a smaller value.
Run the ospf trans-delay command in an interface view to speed up LSA flooding.

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