Found. Thanks for the reply.
The LSDB is a database of all OSPF router LSAs, summary LSAs, and external route LSAs. The LSDB is compiled by an ongoing exchange of LSAs between neighboring routers so that each router is synchronized with its neighbor. When the AS has converged, all routers have the appropriate entries in their LSDB.
To create the LSDB, each OSPF router must receive a valid LSA from each other router in the AS. This is performed through a procedure called flooding. Each router initially sends out an LSA which contains its own configuration. As it receives LSAs from other routers, it propagates those LSAs to its neighbor routers.
In this way, an LSA from a given router is flooded across the AS so that each other router contains that router's LSA. While it appears that the flooding of LSAs across the AS causes a large amount of network traffic, OSPF is very efficient in the propagation of LSA information. Figure 3.11 shows a simple OSPF AS, the flooding of LSAs between neighboring routers, and the LSDB.
The exact details of the synchronization of the LSDB between neighboring routers are discussed in the section on creating adjacencies.
The LSDB is a database of all OSPF router LSAs, summary LSAs, and external route LSAs. The LSDB is compiled by an ongoing exchange of LSAs between neighboring routers so that each router is synchronized with its neighbor. When the AS has converged, all routers have the appropriate entries in their LSDB.
To create the LSDB, each OSPF router must receive a valid LSA from each other router in the AS. This is performed through a procedure called flooding. Each router initially sends out an LSA which contains its own configuration. As it receives LSAs from other routers, it propagates those LSAs to its neighbor routers.
In this way, an LSA from a given router is flooded across the AS so that each other router contains that router's LSA. While it appears that the flooding of LSAs across the AS causes a large amount of network traffic, OSPF is very efficient in the propagation of LSA information. Figure 3.11 shows a simple OSPF AS, the flooding of LSAs between neighboring routers, and the LSDB.
The exact details of the synchronization of the LSDB between neighboring routers are discussed in the section on creating adjacencies.
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