**2.4. Experimental facilities**

The HypeRSimRIP program has a series of experimental facilities that allow modifications of some standard parameters of the RIP protocol. These include


These changes can be done during the network design stage from the Settings window (see Figure 5).


**Figure 5.** Settings window—Default-Start values.

For the infinite value change facility, the most suggestive examples are those with chain-linked routers. By default, the application comes with two such predefined examples: one with 20 chain-linked routers and another with 30 chain-linked routers.

For the facility in which you can change the randomization interval of the automatic updates trigger, the user can repeat rather interesting experiments, such as the one done by Floyd and Jacobson [17], which was the one that initially highlighted the need of a stochastic period. For this facility, an optimal experiment consists in the predefined network topology of 10 routers that generate a full graph. These experiments will be presented in detail in Section 3 of this paper.
