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Bài giảng Mạng máy tính nâng cao - Chương 12: Single-Area OSPF Implementation includes OSPF Overview, OSPF Hierarchy Example, Configuring Loopback Interfaces, Verifying the OSPF Configuratio, OSPF debug Commands, Load Balancing with OSPF. | Mạng máy tính nâng cao-V1 1 OSPF Overview ◦ Creates a neighbor relationship by exchanging hello packets ◦ Propagates LSAs rather than routing table updates Link: Router interface State: Description of an interface and its relationship to neighboring routers ◦ Floods LSAs to all OSPF routers in the area, not just directly connected routers ◦ Pieces together all the LSAs generated by the OSPF routers to create the OSPF link-state database ◦ Uses the SPF algorithm to calculate the shortest path to each destination and places it in the routing table OSPF Hierarchy Example Minimizes routing table entries Localizes the impact of a topology change within an area Neighbor Adjacencies: The Hello Packet SPF Algorithm ◦ Places each router at the root of a tree and calculates the shortest path to each destination based on the cumulative cost ◦ Cost = Reference Bandwidth / Interface Bandwidth .
