Chapter 3. OSPF Communication

Believe in yourself. You gain strength, courage, and confidence by every experience in which you stop to look fear in the face... You must do that which you think you cannot do.

—Eleanor Roosevelt

This chapter introduces you to how OSPF communicates among routers running OSPF. Chapter 2, “Introduction to OSPF,” introduced the components and roles that the routers play when using OSPF and how routes are calculated through the SPF algorithm. When discussing the SPF operations, you were presented with a case study that outlined entry processing in the OSPF link-state database and how routes were determined. This chapter covers how the link-state information is then entered into the link-state database through OSPF’s ...

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