Lab 4.2.2 OSPF Routing Protocol

Objective:

Enable OSPF routing protocol in Area 0 only.

Scenario:

You have been hired by the BubbaGump ISP to setup a fast Ethernet core for their WAN.

(Note: Erase all routers before beginning)

Tasks:

From the "Router A" console

  1. Cable the lab as shown above.
  2. To configure the fastethernet interfaces and turn on the OSPF routing protocol issue the following commands:
  • router-a(config)#interface fastethernet 0/0
  • router-a(config-if)#ip address 206.202.16.1 255.255.255.0
  • router-a(config-if)#no shutdown
  • router-a(config-if)#router ospf 1
  • router-a(config-router)#network 206.202.16.0 0.0.0.255 area 0

What does the 0.0.0.255 represent?

What does the area 0 represent?

  1. Follow the same procedure with different addresses on the other two router Fastethernet interfaces. Note: The OSPF network, wildcard mask, and area # does not change.

From the "Router C" console

  1. Enter show running-config command:
  2. Verify that the router has the OSPF protocol turned on and advertising the networks you defined. Check the syntax of the network statement in OSPF.
  3. Enter show ip ospf command:

What is the current LSA sequence number in area 0?

  1. Enter show ip ospf interface
  1. Enter show ip protocols

Why are updates sent every 0 seconds?

  1. Which router is the DR and which router is the BDR?

  1. What is the default administrative distance of OSPF and how does it compare to RIP?