Lab 5.1.2.1 Multi-Area OSPF Routing

Objective:

Enable OSPF routing protocol for Multiple areas.

Scenario:

You have been hired by the BubbaGump ISP to setup and add on to their WAN.

(Note: Erase all routers before beginning)

Tasks:

1. Cable the lab as shown above.

  • From the "Router A" console
  • Configure OSPF routing in Area 0
  • From the "Router B" console

2. To configure the interfaces and setup multi-area OSPF issue the following commands:

  • router-b(config)#interface loopback 0
  • router-b(config-if)#ip address 2.0.202.206 255.255.255.0
  • router-b(config-if)#interface fastethernet 0/0
  • router-b(config-if)#ip address 206.202.0.2 255.255.255.0
  • router-b(config-if)#no shutdown
  • router-b(config-if)#interface serial 0/0
  • router-b(config-if)#ip address 206.202.1.1 255.255.255.0
  • router-b(config-if)#clockrate 56000
  • router-b(config-if)#router ospf 1
  • router-b(config-router)#network 206.202.0.0 0.0.0.255 area 0
  • router-b(config-router)#network 206.202.1.0 0.0.0.255 area 1
  • router-b(config-router)#^Z

3. Enter show ip ospf and show ip ospf border-routers. Report your findings below:

From the "Router C" console

4. Issue the following commands:

  • router-c(config)#interface loopback 0
  • router-c(config-if)#ip address 1.2.202.206 255.255.255.0
  • router-c(config-if)#interface fastethernet 0/0
  • router-c(config-if)#ip address 206.202.2.1 255.255.255.0
  • router-c(config-if)#no shutdown
  • router-c(config-if)#interface serial 0/0
  • router-c(config-if)#ip address 206.202.1.2 255.255.255.0
  • router-c(config-if)#router ospf 1
  • router-c(config-router)#network 206.202.1.0 0.0.0.255 area 1
  • router-c(config-router)#network 206.202.2.0 0.0.0.255 area 1
  • router-c(config-router)#^Z

5. Enter show ip ospf interface

Is the OSPF protocol turned on the correct interfaces that you defined?

  • From the "Router D" console
  • Configure OSPF routing in Area 1 only.
  • After you have configured "Router D" go back to each router and verify that ospf is turned on and advertising the correct networks. Ping all interfaces.

6. Enter show ip ospf neighbor and report your findings below:

7. Enter show ip ospf border-router and show ip route

What information did the router respond with?

8. Enter show ip ospf interface and debug ip ospf events

What routers are sending hellos and from what area? Why?

9. Enter undebug all