First build the topology according to the diagram
Now go to the router R2 to configure EIGRP
R#conf t
R2(config)#router eigrp 1
R2(config-router)#network 10.0.0.0
R2(config-router)#no auto-summary
Now go to router R3
R3#conf t
R3(config)#router eigrp 1
R3(config-router)#network 10.0.0.0
R3(config-router)#no auto-summary
Now go to router BB
BB#conf t
BB(config)#router eigrp 1
BB(config-router)#network 10.0.0.0
BB(config-router)#network 172.30.0.0 0.0.255.255
BB(config-router)#no auto-summary
Troubleshooting and verification command of EIGRP
BB#show ip eigrp neighbour
BB#show ip eigrp topology (To verify active and passive path)
BB#show ip eigrp traffic (To check how much packet EIGRP send)
