Lab 2.2 OSPF Routing

*Lab Topology*

*Steps*
00:00 Step 1 Complete basic device configuration
09:50 Step 2 Complete the basic OSPF configuration
17:01 Step 3 Display the OSPF status
32:03 Step 4 Configure OSPF authentication
42:07 Step 5 Assume that R1 is the egress of all networks. Therefore, R1 advertises the default route to OSPF
46:01 Step 6 Change the cost values of interfaces on R1 so that LoopBack0 on R1 can reach LoopBack0 on R2 via R3

*About This Lab*
The Open Shortest Path First (OSPF) protocol is a link-state Interior Gateway Protocol (IGP) developed by the Internet Engineering Task Force (IETF). Currently, OSPF Version 2 (RFC2328) is used for IPv4. As a link-state protocol, OSPF has the following advantages:
● Multicast packet transmission to reduce load on the switches that are not
running OSPF
● Classless Inter Domain Routing (CIDR)
● Load balancing among equal cost routes
● Packet authentication
With the preceding advantages, OSPF is widely accepted and used as an IGP.
In the lab activity, you will understand basic OSPF configurations and principles by configuring single-area OSPF.

*Objectives*
Upon completion of this task, you will be able to:
● Learn the basic commands of OSPF
● Learn how to check the OSPF running status
● Learn how to control OSPF route selection using costs
● Understand the advertisement of default routes in OSPF
● Learn how to configure OSPF authentication