Case Study from "Creating Repeatable Computer Science and Networking Experiments on Shared, Public Testbeds"

This page is under construction.

Reproduce the 4-router case study

1. Reserve the 4-router topology:
   1. If you do have a GENI account you can reserve the ​RSpec at any InstaGENI aggregate following these instructions.
      • In particular the 4-node, single aggregate topology is loaded in the portal as OSPF 4-node (InstaGENI)

        !#comment
           b. If you don't have a GENI account you can try [https://www.aptlab.net/instantiate.php?profile=OSRRepeatExp&project=geni instantiating a 4-node topology] using a guest account on [https://www.aptlab.net Apt] (this is under development; the topology loads but the experiment hasn't been fully tested on apt)
              * The exercise works better if you choose to upload your `SSH` public key and login to the router nodes using your own `SSH` client.
        

2. Follow the ​instructions on this page to send traffic and bring interfaces and nodes up and down.

Reproduce multi-site case study topologies

1. Using the same instructions as above, reserve the 7-router topology at either a ​single aggregate or spread across ​three-aggregates
   • The 7-node, single aggregate topology is loaded in the portal as OSPF 7-node (InstaGENI)
   • (under-test) The 7-node, three aggregate topology is loaded in the portal as OSPF 7-node 3-aggregate (InstaGENI)
2. Again, follow the ​instructions on this page to send traffic and bring interfaces and nodes up and down.

Step-by-Step: How to reconstruct the experiment artifacts

The following instructions assume you have a GENI account.

​Step-by-step instructions to recreate each step of the case study is broken into three parts:

• ​How to create the XORP VM image
• ​How to manually configure the trivial 4-node topology Note that the RSpecs shown in this section are bound.
• ​How to scale up the experiment

Other materials:

• ​How to create the XORP VM image
• ​Contents of repo containing experiment artifacts including:
  • ​start-xorp.sh - script to generate OSPF configuration file and start XORP Relies on:
    • ​ospfd-conf-gen.awk - script to generate OSPF configuration file on any node
    • ​example vm_info.txt input file
    • ​example OSPF config file output by the script
  • ​xorp_log.sh - script to periodically compare current routing table state to previous routing table state