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EIGRP and OSPF Lab/Assignment 2 - Part 1

The second part of this lab will form part of your second assignment. The following IP address assignments/networks will be used for both parts of this lab:

Int. Router 1 Router 2 Router 3 Router 4
E0/0 192.168.100.200/24 192.168.100.201/24 192.168.100.202/24 192.168.100.203/24
E1/0 192.168.10.254/27 192.168.20.254/27 192.168.30.254/27 192.168.40.254/27
E1/1 192.168.11.254/27 192.168.21.254/27 192.168.31.254/27 192.168.41.254/27
E1/2 192.168.12.254/27 192.168.22.254/27 192.168.32.254/27 192.168.42.254/27
E1/3 192.168.13.254/27 192.168.23.254/27 192.168.33.254/27 192.168.43.254/27

Part 1

This part is purely for your own amusement and is not assessable. If you have not yet fully completed parts 1 and 2 for assignment one, then you should do that instead. You will however need to complete part 2 of this lab (at the same time as everyone else).

You are required to configure your router so that it will participate in an EIGRP process domain.

  1. Configure each of the interfaces on your router.
  2. Configure your router to participate in the EIGRP process domain number 10. Ensure that you add appropriate network statements.
  3. Confirm that your router is learning routes via EIGRP - you should have some EIGRP routes in your routing table (show ip route).
  4. Ensure that you can reach appropriate parts of the network (eg. try pinging from your host to the central computer and to other routers).
  5. Try adjusting the bandwidth or delay in a particular interface - how does this effect the metrics calculated for each route?
  6. Investigate the operation of EIGRP. In particular try some or all of the following commands: 
    R1#show ip eigrp neighbors
R1#show ip eigrp interfaces
R1#show ip eigrp topology
R1#show ip eigrp traffic

You should disable EIGRP prior to doing part 2 of this lab. Likewise, you should be able to skip step one of part 2 since your interfaces have already been configured.

Part 2

Each group is to configure one router so it will participate in the following simple OSPF network:

Network diagram

Laboratory Tasks

  1. Configure each of the interfaces on your router.
  2. Configure your router to participate in the appropriate OSPF areas.
  3. Disable network telnet access (as per the previous assignment).
  4. Confirm that you can reach the central computer from each of your (four) networks. Record evidence of this - one PING reply from each destination is sufficient ("ping -c 1").
  5. See if you can reach (ping) the other group's routers and computers.
  6. Liase with other groups in an attempt to get the entire network working correctly.
  7. Capture some packets off the central hub and see how the routers are communicating.
  8. Disconnect one of your subnets by disconnecting the Ethernet cable. Sniff a copy (or copies) of the packet(s) sent by your router to the others in Area 0 when the "plug is pulled", then again when it is replaced. Note which subnet you disconnected. You will need this information later.
  9. Record your router configuration (eg. a copy of the running configuration).
  10. Record a copy of your routing table.

Analysis

Disassemble the sniffed packets to discover:

  1. What addresses are the routers using to communicate?
  2. How often are the routers communicating and "what do they say?" (some research is required here).
  3. What happens when you disable one of your subnets by "pulling the plug". What message does your router send to the others and what information does this message contain?