Emulate the TG13 network on your own computer

To help you get started on your lab environment, we built the IPv4 topology implemented at The Gathering in GNS3 for you to play with!

The Gathering topology

We did not include MPLS, VRFs and multicast in this lab configuration because it is not relevant to the CCNA objectives. The physical topology is already set up and cabled, so feel free to configure this on your own! We will upload our configs at http://ftp.gathering.org after TG13 if you want some reference.

These are the steps you need to follow in order to get this up and running on windows:

Download GNS3 from sourceforge

  1. After the installation is complete, get a hold of the Cisco images. In this project, the following images were used:
    - c7200-advipservicesk9-mz.124-15.T10.image (ISP)
    - c3725-adventerprisek9-mz.124-15.T14.image (everything else)
  2. Unfortunately we cannot provide these images on our website due to licensing issues.

  3. Download the GNS3 project from our FTP server, extract it and place it on your C:\ drive
  4. Place the Cisco IOS images in C:\GNS3\IOS\
  5. Start GNS3 and make sure that you idle PC values are set. You do this by right-clicking the router after it has been powered on, and then click “idle pc”. This will make GNS3 calculate the values for you. Read more about how to do this on http://www.gns3.net/gns3-simplest-topology/

  6. Click file->open and select “C:\GNS3\The Gathering 2013\topology.net”

This should get you up and running. Have fun – and don’t be afraid to ask questions!

This entry was posted in certifications, cisco, configuration, crew, design, fun. Bookmark the permalink.

10 Responses to Emulate the TG13 network on your own computer

  1. zerox129 says:

    Can you put out with vrf and mpls?

    • Martin Karlsen says:

      We will upload our configuration files soon. You can use them as a reference to set up MPLS and VRFs in this GNS3 topology if you want.

    • Håvard Staub Nyhus says:

      There isn’t a huge use case for MPLS/VRF in the TG network, we only deployed it on the hop from Nocgw to Telegw, and the usage was very limited. No boxes used this year except the 6500s and the ASR1k (ipv6 multicast RP) even support MPLS.

      There are other excellent sources of reference on mpls/vrf configuration that will get you much much further than our setup.

  2. Hvor finner man images?

  3. Uhm, Cisco IOS images, where to get them? I guess I got to buy them?

  4. Hmm, can’t seem to find “c7200-adventerprisek9-mz.124-15.T10″ – not even on Cisco’s website…

    • Martin Karlsen says:

      There is only one C7200 series router in this topology, so if you’re not able to get a hold of the C7200 image, you could always set up a C3725. Just copy the configuration from the C7200 configuration file and you should be good to go!

  5. wayshot says:

    Downloading IOS images through the Cisco website requires a Smartnet contract for the chosen hardware.
    Paste the IOS image name on Google, and you may be able to find it through various “unofficial” sources – at your own risk!

  6. Marius Hole says:

    A tip for those who want a switch in the GNS lab. Use an switch service module in a ISR router:

    Good luck with training and certifications! :)

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