| 30 | 30 | Once we have installed the software on the VM, we may need to configure the software, and automate the configuration process for every node used in an experiment. For this tutorial, since we are setting a virtual routing environment, we will need to configure the routing protocol (e.g., OSPF protocol) for `XORP`. Again, let's start with the smallest reasonable topology, which is a four-router virtual topology as shown below. The reason that we chose the four-router topology is that we need at least one pair of routers that are not directly connected to each other and each router must have at least two virtual interfaces. |
