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GNS3 Lab & Exercise: OSPF Case Study & Lab Scenario 2

Written by LBSources from http://www.gns3-labs.com on June 19th, 2010 | 3 Comments

How are we doing? I’m continuing on working to complete this lab book and all the labs :)

This is another OSPF related lab from the Cisco Networking Academy Lab Portfolio. No EIGRP or other protocols involved. This lab involves the use of sub-interfaces, which changes your frame-relay statements – watch out and don’t get too confused :)

I perform all of these labs on my own using my own knowledge and experience (warning and disclaimer). They may very well be implemented differently than a method you might choose. So long as it meets the requirements and works, essentially it’s acceptable (In my feeble opinion). But if you notice a terribly or complicated method used by me to achieve the goals and you feel yours is much easier, makes sense or is the standard; please do share – I’m always open to learning :)

As mentioned before, these labs come from below. If you use the link below and purchase this book – you help me pay hosting bills :)

CCNP Building Scalable Internetworks (BSCI 642-901) Lab Portfolio (Cisco Networking Academy)

Instructions
Plan, design and implement the International Travel Agency network shown in
the diagram, and described below. Verify that all configurations are operational
and functioning according to the guidelines.


Scenario

The International Travel Agency needs its core network set up for OSPF with
the specifications indicated in the diagram and shown below.

  • Use the addressing scheme shown in the diagram.
  • Use OSPF with various networks shown in the diagram.
  • Configure the OSPF backbone area to be on Loopback0 on Headquarters.
  • Configure the Frame Relay subnets as point-to-point subinterfaces. The link between Headquarters and East should be in area 100, and the link between headquarters and West should be in area 300.
  • Area 300 should be configured as an NSSA.
  • Configure East’s loopback interfaces to be in area 200. Summarize this area with the most efficient summary.
  • Redistribute the loopback network on West into OSPF.
  • Create virtual links as necessary for full connectivity.
  • Make sure that all loopback interfaces get advertised with the correct subnet mask.

Routers Used:2691(Any router type should be fine)

IOS: c2691-adventerprisek9_sna-mz.124-13b

Feature of Topology: OSPF, Redistribution, Summarization, NSSA, Point-To-Point, Sub-interfaces, Virtual-links

Image:

Download: GNS3-Labs:: OSPF Case Study Lab Scenario 2

Enjoy .. LBS

P.S. If you would like to donate for the time it takes to do all of this, feel free to use the link below. Thank you in advance for any contribution you make :)





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3 Responses to “GNS3 Lab & Exercise: OSPF Case Study & Lab Scenario 2”

  1. avatar OmiBarbosa

    Good lab! – stars ****- (4/5)

    Thanx for the labs!

  2. avatar alex_c

    Hello,

    This lab is very good, just 2 things I would like to mention, regarding:
    ~~~~

    Configure East’s loopback interfaces to be in area 200. Summarize this area with the most efficient summary.
    Redistribute the loopback network on West into OSPF.

    ~~~~
    Summarization is being made per network, not per area. The networks are being summarized, so that the LSA containing those networks will be advertised by OSPF in the domain.
    And the other thing, redistributing the loopback network into OSPF domain. Redistribution into OSPF is being made only by ASBR or ABR. Until this task, East router is neither ABR or ASBR. Only after creating the virtual link, he can be considered ABR, and redistribution will work(before only the command will be accepted, but the LSA won't get redistributed). I think you should place the virtual link task above these 2 tasks.
    Please correct me if im wrong.
     
    Cheers.

  3. avatar Yatin

    Hi,
     
    Lab was good.
    I summarized the East router Loopback, under ospf process with network 10.1.1.101 0.0.0.31 a 200
    Is this the right way or am i doing something wrong, Because in answer configuration file individual Loopback network is introduced. I want the correct way of doing the Summarization.
    Thanks!!
    :)

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