Lab 22

Lab Objective:

The focus of this lab is to understand OSPF implementation and configuration in Cisco IOS routers. Additional technologies tested include authentication and backbone connectivity.

Lab Topology:

The lab network topology is illustrated below:

Task 1

Configure hostnames and IP addressing on all routers as illustrated in the network topology.

Task 2

Using interface-based configuration, configure OSPF area 0 on the LAN segment connecting R1 and R4. To allow for faster convergence, configure OSPF to detect neighbor failure within one second. The OSPF Dead Interval should be set to 1 second. The routers should send four Hellos every second. Verify your configuration using the appropriate commands.

Task 3

Using interface-based configuration, configure OSPF area 1 between R1 and R2. This area should be configured as a Totally Stubby area. Verify your configuration.

Task 4

Using interface-based configuration, configure OSPF area 2 between R2 and R3. Ensure that this area is able to communicate with the OSPF backbone. Verify your configuration.

Task 5

To allow for area 2 resiliency, configure your network so that the WAN link between R1 and R3 is used to allow reachability to and from R3 as well as to the 150.3.3.0/24 subnet should the WAN link between R2 and R3 fail. You are permitted to use TWO static routes to complete this task. Test your solution by shutting down the WAN link between R2 and R3.

Task 6

Configure plain text authentication for the OSPF backbone area. Ensure that all routing still works following your configuration. Use the password 'CCNP' for authentication.