How the OSPF works

OSPF (Open Shortest Path First) is the most commonly used routing protocol in enterprise networks. It is important to understand how it works in order to use OSPF effectively. This section explains how the OSPF works.

OSPF Router ID : Identify OSPF routers

OSPF allows each router to be identified by its router ID. the OSPF notation is the same as the IP address.
This section explains in detail how to determine the router ID and the confirmation command on a Cisco router.

OSPF Basic Configuration and Verification Commands

There are two basic configuration procedures for OSPF
1. Enable the OSPF routing process.
2. Enable OSPF on the interface

OSPF Cost Configuration and Verification

The metric for determining the best route in OSPF is the path cost. It is the cumulative cost of an interface on a route.
This section explains the concept of path cost and how to change and check the cost on a Cisco router.