Why cannot an OSPF route that exists in the LSDB be found in the routing table

Perform the following steps to solve this problem:

Check whether the IP address is valid.
Check whether the forwarding address is known and reachable.
Check whether the routes are summarized or redistributed correctly.
Check whether different masks or IP addresses are used in the Peer-to-peer (P2P) connection.
Check whether route lists are advertised.
Check whether the backbone area is disconnected.
Check whether OSPF is enabled on the secondary address but not on the primary address.
Parent topic: IP Routing

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