Bài giảng Mạng máy tính nâng cao - Chương 12: Single-Area OSPF Implementation

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.
Nội dung trích xuất từ tài liệu:
Bài giảng Mạng máy tính nâng cao - Chương 12: Single-Area OSPF ImplementationMạng máy tính nâng cao-V11OSPF Overview◦ Creates a neighbor relationship by exchanginghello packets◦ Propagates LSAs rather than routing tableupdatesLink: Router interfaceState: Description of an interface and its relationship toneighboring routers◦ Floods LSAs to all OSPF routers in the area, notjust directly connected routers◦ Pieces together all the LSAs generated by theOSPF routers to create the OSPF link-statedatabase◦ Uses the SPF algorithm to calculate the shortestpath to each destination and places it in therouting tableOSPF Hierarchy ExampleMinimizes routing table entriesLocalizes the impact of a topology change within an areaNeighbor Adjacencies: The HelloPacketSPF Algorithm◦ Places each router at the root of a tree and calculates theshortest path to each destination based on the cumulativecost◦ Cost = Reference Bandwidth / Interface Bandwidth (b/s)