The Database Exchange Process
Every router in an area, when OSPF stabilizes after topology changes occur, should have an identical LSDB for that area. Internal routers (routers inside a single area) have only that area’s LSAs, but an ABR’s LSDB will contain LSAs for each area to which it connects. The ABR does, however, know which LSAs exist in each area.
OSPF routers flood both the LSAs they create, and the LSAs they learn from their neighbors, until all routers in the area have a copy of each of the most recent LSAs for that area. To manage and control this process, OSPF defines several messages, processes, and neighbor states that indicate the progress when flooding LSAs to each neighbor. This section begins by listing reference information ...
Get CCNP Routing and Switching ROUTE 300-101 Official Cert Guide now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
