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.
- OSPF poisons LSA by setting max-age (3600).
OSPF types of Link State Advertisement (LSA)
- Type 1: Router LSA
- Type 2: Network LSA
- Type 3: Summary LSA
- Type 4: Summary ASBR LSA
- Type 5: Autonomous system external LSA
- Type 6: Multicast OSPF LSA
- Type 7: Not-so-stubby area LSA
- Type 8: External attribute LSA for BGP
