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'''[http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/SystematicExprCaseStudy#ATutorialonSystematicExperimentalDesign A Tutorial on Systematic Experimental Design]'''
'''[http://groups.geni.net/geni/wiki/GENIExperimenter/Tutorials/SystematicExprCaseStudy/InstallSoftware Step I: Single Node]'''
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= Small Topology Experimentation =
So far, we have created an InstaGENI custom image that has `XORP` installed. In order to configure and verify `OSPF` routing, we need to create a network where at least two routers are not directly connected.
We will test `OSPF` configuration and automation with a four-node topology in this part, and verify that the `OSPF` routing is working properly in this small network.
[[Image(GENIExperimenter/Tutorials/SystematicExprCaseStudy/SmallTopo:4node-config-add-endhosts.png)]]
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