May 26, 2016 ยท A common problem when using Open Shortest Path First (OSPF) is routes in the database don't appear in the routing table. In most cases OSPF finds a discrepancy in the database so it doesn't install the route in the routing table. Often, you can see the Adv Router is not-reachable message (which means that the router advertising the LSA is not .... OSPF Link-State Database (LSDB) Each router stores it's LSA in it's LSDB. Each router within the same area should have the same LSDB information. SPF algortithm for each area it is connected to. The router thinks it's the root of the tree and draws branches via SPF. LSAs in OSPF LSDB are pieces that the SPF process uses. . "/>Lsdb ospf