Configuring a basic EIGRP network:

Network Design (I’m using sub-interfaces on my equipment, as I have other traffic on other sub-interfaces):

Step 1) Enable EIGRP on every router:

Router 1:

Router1#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router1(config)#router eigrp 1
Router1(config-router)#network 192.168.60.0 0.0.0.255
Router1(config-router)#network 172.16.1.1 0.0.0.255

Router 2:

Router2#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router2(config)#router eigrp 1
Router2(config-router)#network 192.168.60.0 0.0.0.255
Router2(config-router)#network 172.17.1.0 0.0.0.255

Router 3:

Router3#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router3(config)#router eigrp 1
Router3(config-router)#network 192.168.60.0 0.0.0.255
Router3(config-router)#network 172.18.1.0 0.0.0.255

Step 2) Verify that you have EIGRP Neighbors:

Router1#show ip eigrp interfaces (shows which interfaces are enabled for eigrp)

Router1#show ip protocols (shows the details of the network configuration commands)

Router1#show ip eigrp neighbors (shows the eigrp neighbors, interfaces, and uptime of those neighborships)

Router1#show ip eigrp topology (shows the eigrp topology table and all the metric calculations for all routes which are being exchanged between neighbors)

Router1#show ip route eigrp (shows an output of the global routing table and all the eigrp routes used for routing between neighbors)

Step 3) Enjoy the simple setup.