Unit 1: Network Infrastructure
This will allow you to demonstrate your networking skills, knowledge, and abilities, with a focus on enterprise-level switching, routing, and multicast components that support cross-platform (inter)operability and integration with the most recent software-defined technologies.
OSPF is responsible for listening to its neighbors and collecting the link-state data from them in order to construct a topology map that includes all of the routers that are part of the network. This information is then saved in the Link-State Database. Utilizing the SPF algorithm, which stands for “Shortest Path First,” it determines the most efficient and effective route to access a certain network by utilizing the information that is kept in the Link-State Database.
Tables for OSPF:
- Neighbor Table: The neighbor table shows all the neighbors whose link-state data is being shared.
- Topology Table (Database Table): This table shows where all the OSPF routers are placed and what the best way is to get to them.
- Routing Table: This is where the best path to send traffic between neighbors is stored.
OSPF Area:
- To be more precise, an OSPF Area is a group of routers that are conceptually connected through their interfaces. Each interface is limited to a single OSPF area.
- In an OSPF Area, all routers use the same Link-State Database.
- A router will have numerous Link-State Databases, one for each area, if its interfaces are located in separate areas.
Backbone area:
Area 0 is a unique region that is referred to as the Backbone area, and all other areas are required to connect to the Backbone area. Each and every OSPF area is obligated to transmit its routing information to the Backbone Area, and the Backbone Area is responsible for advertising these routers to other areas for distribution. This Backbone area is responsible for preventing routing loops.
