I give new users a simple Lab with all configs of routers and „workstations“. I used OSPF-Routing protocol.
You can observe how routers R1 and R2 communicate to change routing information about all of the connected networks. In a proper routing environment no static route is needed to find foreign networks.

Keep hands on this step-by-step manual to find out how routing works. The attached file ospf-lab.zip gifes you a detailled instruction manual how you use this lab and also an example how to sniff traffic with wireshark.

Ueli