18 Open Shortest Path First
This chapter covers
- Open Shortest Path First link-state advertisements and database
- How OSPF routers calculate routes
- Configuring OSPF on Cisco routers
- How OSPF routers become neighbors and form adjacencies
Open Shortest Path First (OSPF) is an interior gateway protocol (IGP) that serves as a key building block of modern enterprise networks. In chapter 17, we covered dynamic routing protocols in general and also examined how to use the network command to activate OSPF on router interfaces. In this chapter, we will dig deeper into the topic of OSPF and see how it actually works, including how OSPF-enabled routers become neighbors with each other, share routing information, calculate routes, and many other details. ...
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