Three router topology for lab practice in Packet Tracer 3.5

RIPv2 Routing

Router_ATD:

router rip
version 2
network 172.16.0.0
network 172.16.1.0
no auto-summary
passive-interface f0/0

Router_ISB:

router rip
version 2
network 172.16.1.0
network 192.168.3.0
network 10.0.0.0
no auto-summary
passive-interface f0/0

Router_LHR:

router rip
version 2
network 10.0.0.0
network 192.168.4.0
no auto-summary
passive-interface f0/0