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OSPF 2
The document explains the creation of neighbor, topology, and routing information tables in a network, detailing neighbor IDs and link IDs for various networks. It also discusses the impact on these tables when network links go down, affecting the best path for data transmission. Additionally, the document illustrates the costs associated with different paths and how they change under various network conditions.
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OSPF 2
- 1. How Neighbor Tableis created ? S1 S0 KOL E0 - 192.168.4.0 S1 S0 HYD S0 S1 10.0.0.0 E0 E0 - 192.168.1.0 1.150 S0 CHE S1 BAN 11.0.0.0 E0 E0 - 192.168.2.0 2.150 E0 E0 - 192.168.3.0 3.150 Neighbor ID Int Neighbor ID Int Neighbor ID Int 192.168.2.150 S0 192.168.1.150 S1 192.168.2.150 S1 192.168.4.150 S1 192.168.3.150 S0 192.168.4.150 S0 LAN - 192.168.1.0/24 LAN - 192.168.2.0/24 LAN - 192.168.3.0/24 1
- 2. How Topology Tableis created ? S1 S0 KOL E0 - 192.168.4.0 S1 S0 HYD S0 S1 10.0.0.0 S0 CHE S1 BAN 11.0.0.0 E0 E0 - 192.168.1.0 1.150 E0 E0 - 192.168.2.0 2.150 E0 E0 - 192.168.3.0 3.150 Link ID Link ID Link ID 192.168.4.150 192.168.4.150 192.168.1.150 192.168.1.150 192.168.1.150 192.168.3.150 192.168.2.150 192.168.2.150 192.168.2.150 192.168.3.150 192.168.3.150 192.168.4.150 LAN - 192.168.1.0/24 LAN - 192.168.2.0/24 LAN - 192.168.3.0/24 2
- 3. How Routing Information Tableis created ? S1 Cost = 10 S0 Cost = 15 KOL E0 - 192.168.4.0 S1 S0 HYD Cost = 10 S1 10.0.0.0 S0 CHE S0 Cost = 10 S1 BAN 11.0.0.0 E0 E0 - 192.168.1.0 1.150 E0 E0 - 192.168.2.0 2.150 E0 E0 - 192.168.3.0 3.150 Best path Best path Best path 192.168.2.0 = H C 192.168.1.0 = C H 192.168.1.0 = B C H 192.168.3.0 = H C B 192.168.3.0 = C B 192.168.2.0 = B C 192.168.4.0 = H K 192.168.4.0 = C H K 192.168.4.0 = B K LAN - 192.168.1.0/24 LAN - 192.168.2.0/24 LAN - 192.168.3.0/24 3
- 4. If, Link goesdown ? S1 S0 KOL E0 - 192.168.4.0 S1 S0 HYD E0 1.150 S0 S1 10.0.0.0 LAN - 192.168.1.0/24 S0 CHE E0 2.150 S1 BAN 11.0.0.0 LAN - 192.168.2.0/24 E0 3.150 LAN - 192.168.3.0/24 4
- 5. Effect on NeighborTable ? S1 S0 KOL E0 - 192.168.4.0 S1 S0 HYD S0 S1 10.0.0.0 E0 E0 - 192.168.1.0 1.150 S0 CHE S1 BAN 11.0.0.0 E0 E0 - 192.168.2.0 2.150 E0 E0 - 192.168.3.0 3.150 Neighbor ID Int Neighbor ID Int Neighbor ID Int 192.168.2.150 S0 192.168.1.150 S1 192.168.2.150 S1 192.168.4.150 S1 192.168.3.150 S0 192.168.4.150 S0 LAN - 192.168.1.0/24 LAN - 192.168.2.0/24 LAN - 192.168.3.0/24 5
- 6. Effect on TopologyTable ? S1 S0 KOL E0 - 192.168.4.0 S1 S0 HYD S0 S1 10.0.0.0 S0 CHE S1 BAN 11.0.0.0 E0 E0 - 192.168.1.0 1.150 E0 E0 - 192.168.2.0 2.150 E0 E0 - 192.168.3.0 3.150 Link ID Link ID Link ID 192.168.4.150 192.168.4.150 192.168.4.150 192.168.1.150 192.168.1.150 192.168.3.150 192.168.2.150 192.168.2.150 192.168.2.150 192.168.3.150 192.168.3.150 192.168.1.150 LAN - 192.168.1.0/24 LAN - 192.168.2.0/24 LAN - 192.168.3.0/24 6
- 7. Effect on RoutingInformation Table ? S1 Cost = 10 S0 Cost = 15 KOL E0 - 192.168.4.0 S1 S0 HYD Cost = 10 S1 10.0.0.0 S0 CHE S0 Cost = 10 S1 BAN 11.0.0.0 E0 E0 - 192.168.1.0 1.150 E0 E0 - 192.168.2.0 2.150 E0 E0 - 192.168.3.0 3.150 Best path Best path Best path 192.168.2.0 = H C 192.168.1.0 = C H 192.168.1.0 = B C H 192.168.1.0 = B C H 192.168.3.0 = H C B 192.168.3.0 = C B 192.168.2.0 = B C 192.168.4.0 = H K 192.168.4.0 = C H K 192.168.4.0 = B K LAN - 192.168.1.0/24 LAN - 192.168.2.0/24 LAN - 192.168.3.0/24 7
- 8. Effect on RoutingInformation Table ? S1 Cost = 10 S0 Cost = 15 KOL E0 - 192.168.4.0 S1 S0 HYD Cost = 10 S1 10.0.0.0 S0 CHE S0 Cost = 10 S1 BAN 11.0.0.0 E0 E0 - 192.168.1.0 1.150 E0 E0 - 192.168.2.0 2.150 E0 E0 - 192.168.3.0 3.150 Best path Best path Best path 192.168.2.0 = HKBC 192.168.1.0 = CBKH 192.168.1.0 = B K H 192.168.3.0 = H K B 192.168.3.0 = C B 192.168.2.0 = B C 192.168.4.0 = H K 192.168.4.0 = C B K 192.168.4.0 = B K LAN - 192.168.1.0/24 LAN - 192.168.2.0/24 LAN - 192.168.3.0/24 8