1] Each router discovers its neighbors on each interface. The list of neighbors is kept in a
neighbor table.
2] Each router uses a reliable protocol to exchange topology information (LSAs) with its
neighbors.
3] Each router places the learned topology information in its topology database.
4] Each router runs the SPF algorithm against its own topology database to calculate the
best routes to each subnet in the database.
5] Each router places the best route to each subnet in the IP routing table.
