Exchange Routing information is exchanged using DD and LSR packets.
Loading Link State Request packets are sent to neighbors to request any new LSAs that were found while in the Exchange state.
Full All LSA information is synchronized among adjacent neighbors.
To gain a better understanding of how an adjacency is formed, let's con-
sider the formation of an adjacency in a broadcast multi-access environment. Figure 4.1 displays a flow chart that depicts each step of the initialization process. The process starts by sending out Hello packets. Every listening router will then add the originating router to the neighbor database. The responding routers will reply with all of their Hello information so that the originating router can add them to its own neighbor table.